AB08X5-RTC

AB08X5-RTC ABRACON | Alldatasheet

Document overview

• Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
• PDF pages: 33

Technical content

Features

• Ultra-low supply current (all at 3V): - 14 nA with RC oscillator - 22 nA with RC oscillator and Autocalibration - 55 nA with crystal oscillator
• Baseline timekeeping features: - 32.768 kHz crystal oscillator with integrated load capacitor/resistor - Counters for hundredths, seconds, minutes, hours, date, month, year, century, and week- day - Alarm capability on all counters - Programmable output clock generation (32.768 kHz to 1 year) - Countdown timer with repeat function - Automatic leap year calculation
• Advanced timekeeping features: - Integrated po wer optimized RC oscillator - Advanced crystal calibration to ± 2 ppm - Advanced RC calibration to ± 16 ppm - Automatic calibration of RC oscillator to crystal oscillator - Watchdog timer with hardware reset - 256 bytes of general purpose RAM
• Power management features: - Automatic switchover to VBAT - External interrupt monitor - Programmable low battery detection threshold - Programmable analog voltage comparator 2C (up to 400 kHz) and 3-wire or 4-wire SPI (up to 2 MHz) serial interfaces available
• Operating voltage 1.5-3.6 V
• Clock and RAM retention voltage 1.5-3.6 V
• Operating temperature –40 to 85 °C
• All inputs include Schmitt Triggers
• 3x3 mm QFN-16 package

Applications

• Smart cards
• Wireless sensors and tags
• Medical electronics
• Utility meters
• Data loggers
• Appliances
• Handsets
• Consumer electronics
• Communications equipment

Description

The ABRACON AB08X5 Real -Time Clock family provides a groundbreaking combination of ultra-low power coupled with a highly sophisticated feature set. With power requirements significantly lower than any other industry RTC (as low as 14 nA), these are the first semiconductors based on innovative SPOT TM (Subthreshold Power Optimized Technology) CMOS platform. The AB08X5 includes on-chip oscillators to provide minimum power consumption, full RTC functions including battery backup and programmable counters and alarms for timer and watchdog functi ons, and either an I 2C or SPI serial interface for communication with a host controller. Disclaimer: AB08X5 series of devices are based on innovative SPOT technology, proprietary to Ambiq Micro.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 2 of 33 Abracon Drawing #453567 Revision: C 1. Family Summary The AB08X5 family consists of several members (see Table 1). All devices are supplied in a standard 3x3 mm QFN-16 package. Members of the software and pin compatible AB18X5 RTC family are also listed. Table 1: Family Summary Part # Baseline Timekeeping Advanced Timekeeping Power Management Interface XT Osc Number of GP Outputs RC Osc Calib/ Auto- calib Watch- dog RAM (B) VBAT Switch Reset Mgmt Ext Int Power Switch and Sleep FSM Software and Pin Compatible AB18X5 Family Components

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 4 of 33 Abracon Drawing #453567 Revision: C The advanced timekeeping feature group supports two additional oscillation modes: 1) RC oscillator mode, and 2) Autocalibration mode. At only 14 nA, the temperature-compensated RC oscillator mode provides an even lower current draw than the XT oscillator for applic ations with reduced frequency accuracy requirements. A proprietary calibration algorithm allows the AB 08X5 to digitally tune the RC oscillator frequency and the XT oscillator frequency with accuracy as lo w as 2 ppm at a given temperature. In Autocalibration mode, the RC oscillator is used as the primary oscillation so urce and is periodically calibrated against the XT oscillator. Autocalibration may be don e automatically every 8.5 minutes or 17 minutes and may also be initiated via software. This mode enables average current draw of only 22 nA with frequency accuracy similar to the XT oscilla tor. The advanced timekeeping feature group also includes a rich set of input and output configurat ion options that enables the monitoring of external interrupts (e.g., pushbutton signals), the generation of clock outputs, and watchdog timer functionality. Power management features built into the AB08X5 enabl e it to operate as a backup device in both line- powered and battery-powered systems. An integrated power control module automatically detects when main power (VCC) falls below a threshold and switc hes to backup power (VBAT). 256B of ultra-low leakage RAM enable the storage of key parameters when operating on backup power. The AB08X5 also includes digitally-tunable voltage detection on the backup power supply.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 5 of 33 Abracon Drawing #453567 Revision: C 3. AB08X5 Example Applications

3.1 Battery Backed Up RTC

The most common AB08X5 application is a battery backed up RTC, which maintains time and may hold data in RAM. The AB08X5 is normally powered from a system power supply, which may be a larger battery. The AB08X5 is continuously charging a supercapacitor or rechargeable battery via the internal trickle charger. When the main power supply goes away, the AB08X5 automatically switches to the VBAT supply and maintains time and RAM data at very low battery supply currents.

3.2 RTC with Interrupt Aggregation

The flexible inputs of the AB08X5 can be used to aggregate a variety of interrupt sources, including external digital inputs, analog levels, timers and alarms into a single interrupt source to an MCU. VCC VSS FOUT/nIRQ IRQ VCC VSS AB08X5 MCU I2C/SPIVBAT System Power Battery/ Supercap XO XI 1.5k* * Total battery series impedance = 1.5k ohms, which may require an external resistor VCC VSS FOUT/nIRQ IRQ VCC VSS AB08X5 MCU I2C/SPI System Power XO XI WDI EXTI VBATAnalog Level Digital Inputs

4.1 Pin Configurat ion and Connections

left unconnected. The thermal pad, pin 17, on the QFN-16 packages must be connected to VSS. Figure 2. Pin Configuration Diagram

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 7 of 33 Abracon Drawing #453567 Revision: C

4.2 Pin Descriptions

Table 3 provides a description of the pin connections. Table 3: Pin Descriptions Pin Name Description VSS Ground connection. In the QFN-16 packages the ground slug on the bottom of the package must be connected to VSS. VCC Primary power connection. If a single power s upply is used, it must be connected to VCC. VBAT Battery backup power connection. If a backup battery is not present, VBAT must be connected directly to VSS, but it may also be used to provide the anal og input to the internal comparator (see Analog- Comparator). XI Crystal oscillator input connection. XO Crystal oscillator output connection. AF Autocalibration filter connection. A 47pF ceramic capacitor must be placed between this pin and VSS for improved Autocalibration mode timing accuracy. SCL I/O interface clock connection. It provides the SCL input in both I 2C and SPI interface parts. A pull-up resistor is required on this pin. SDA (only available in I2C environments) I/O interface I2C data connection. A pull-up resistor is required on this pin. SDO (only available in SPI environments) I/O interface SPI data output connection. SDI I/O interface SPI data input connection. nCE (only available in SPI environments) I/O interface SPI chip select input connection. It is an active low signal. A pul l-up resistor is recom- mended to be connected to this pin to ensure it is not floating. A pull-up resistor also prevents inadver- tent writes to the RTC during power transitions. EXTI External interrupt input connection. It may be used to generate an External 1 interrupt with polarity selected by the EX1P bit if enabled by the EX1E bit. The value of the EXTI pin may be read in the EXIN register bit. This pin does not have an internal pull-up or pull-down resistor and so one must be added externally. It must not be left floating or the RTC may consume higher current. Instead, it must be con- nected directly to either VCC or VSS if not used. WDI Watchdog Timer reset input connection. It may also be used to generate an External 2 interrupt with polarity selected by the EX2P bit if enabled by the EX2E bit. The value of the WDI pin may be read in the WDIN register bit. This pin does not have an internal pull-up or pull-down resistor and so one must be added externally. It must not be left floating or the RTC may consume higher current. Instead, it must be connected directly to either VCC or VSS if not used.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 8 of 33 Abracon Drawing #453567 Revision: C FOUT/nIRQ Primary interrupt output connection. This pin is an open drain output. An external pull-up resistor must be added to this pin. It should be connected to the ho st device and is used to indicate when the RTC can be accessed via the serial interface. FOUT/nIRQ may be configured to generate several signals as a function of the OUT1S field(see 0x11 - Control2). FOUT/nIRQ is also asserted low on a power up until the AB08X5 has exited the reset state and is accessible via the I/O interface. 1. FOUT/nIRQ can drive the value of the OUT bit. 2. FOUT/nIRQ can drive the inverse of the combined interrupt signal IRQ (see Interrupts). 3. FOUT/nIRQ can drive the square wave output (see 0x13 - SQW) if enabled by SQWE. 4. FOUT/nIRQ can drive the inverse of the al arm interrupt signal AIRQ (see Interrupts). nIRQ2 1. Secondary interrupt output connection. It is an open dr ain output. This pin can be left floating if not used. nIRQ2 may be configured to generate several signals as a function of the OUT2S field (see 0x11 - Control2). nIRQ2 can drive the value of the OUTB bit. 2. nIRQ2 can drive the square wave out put (see 0x13 - SQW) if enabled by SQWE. 3. nIRQ2 can drive the inverse of the combined interrupt signal IRQ(see Interrupts). 4. nIRQ2 can drive the inverse of the alarm interrupt signal AIRQ(see Interrupts). 5. nIRQ2 can drive either sense of the timer interrupt signal TIRQ. nTIRQ (only available in I 2C environments) Timer interrupt output connection. It is an open drain output. nTIRQ always drives the active low nTIRQ signal. If this pin is used, an external pull-up resistor must be added to this pin. If the pin is not used, it can be left floating. Table 3: Pin Descriptions Pin Name Description

1. Electrical Specifications

5.1 Absolute Maximum Ratings

Table 4 lists the absolute maximum ratings.

5.2 Power Supply Parameters

Switching for a detailed description of the operations. Figure 3. Power Supply Switchover

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 10 of 33 Abracon Drawing #453567 Revision: C  For Table 5, TA = -40 °C to 85 °C, TYP values at 25 °C. Table 5: Power Supply and Switchover Parameters SYMBO L PARAMETER PWR TYPE POWER STATE TEST CONDITIONS MIN TYP MAX UNIT VCC System Power Voltage VCC Static VCC Power Clocks operating and RAM and registers retained 1.5 3.6 V VCCIO VCC I/O Interface Voltage VCC Static VCC Power I2C or SPI opera- tion 1.5 3.6 V VCCST VCC Start-up Voltage(1) VCC Rising POR -> VCC Power 1.6 V VCCRST VCC Reset Voltage VCC Falling VCC Power -> POR VBAT < V BAT,MIN or no VBAT 1.3 1.5 V VCCSWR VCC Rising Switch-over Threshold Voltage VCC Rising VBAT Power -> VCC Power VBAT ≥ VBATRST 1.6 1.7 V VCCSWF VCC Falling Switch-over Threshold Voltage VCC Falling VCC Power -> VBAT Power VBAT ≥ VBATSW,MIN 1.2 1.5 V VCCSWH VCC Switchover Thresh- old Hysteresis(2) VCC Hyst. VCC Power <-> VBAT Power 70 mV VCCFS VCC Falling Slew Rate to switch to VBAT state(4) VCC Falling VCC Power -> VBAT Power VCC < VCCSW,MAX 0.7 1.4 V/ms VBAT Battery Voltage VBAT Static VBAT Power Clocks operating and RAM and reg- isters retained 1.4 3.6 V VBATSW Battery Switchover Volt- age Range(5) VBAT Static VCC Power -> VBAT Power 1.6 3.6 V VBATRST Falling Battery POR Volt- age(7) VBAT Falling VBAT Power -> POR VCC < VCCSWF 1.1 1.4 V VBMRG VBAT Margin above VCC (3) VBAT Static VBAT Power 200 mV VBATESR VBAT supply series resis- tance(6) VBAT Static VBAT Power 1.0 1.5 k  (1) VCC must be above VCCST to exit the POR state, independent of the VBAT voltage. (2) Difference between VCCSWR and VCCSWF. (3) VBAT must be higher than VCC by at least this voltage to ensure the AB08X5 remains in the VBAT Power state. (4) Maximum VCC falling slew rate to guarantee correct switchover to VBAT Power state. There is no VCC falling slew rate requirement if switching to the VBAT power source is not required. (5) VBAT voltage to guarantee correct transition to VBAT Power state when VCC falls. (6) Total series resistance of the power source attached to the VBAT pin. The optimal value is 1.5k, which may require an external resistor. VBAT power source ESR + external resistor value = 1.5k (7) VBATRST is also the static voltage required on VBAT for register data retention.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 11 of 33 Abracon Drawing #453567 Revision: C

5.3 Operating Parameters

Table 6 lists the operating parameters.  For Table 6, TA = -40 °C to 85 °C, TYP values at 25 °C. Table 6: Operating Parameters SYMBOL PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT VT+ Positive-going Input Thresh- old Voltage 3.0V 1.5 2.0 V 1.8V 1.1 1.25 VT- Negative-going Input Thresh- old Voltage 3.0V 0.8 0.9 V 1.8V 0.5 0.6 IILEAK Input leakage current 3.0V 0.02 80 nA CI Input capacitance 3 pF VOH High level output voltage on push-pull outputs 1.7V – 3.6V 0.8•VCC V VOL Low level output voltage 1.7V – 3.6V 0.2•VCC V IOH High level output current on push-pull outputs VOH = 0.8●VCC 1.7V -2 -3.8 mA 1.8V -3 -4.3 3.0V -7 -11 3.6V -8.8 -15 IOL Low level output current VOL = 0.2●VCC 1.7V 3.3 5.9 mA 1.8V 6.1 6.9 3.0V 17 19 3.6V 18 20 IOLEAK Output leakage current 1.7V – 3.6V 0.02 80 nA

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 12 of 33 Abracon Drawing #453567 Revision: C

5.4 Oscillator Parameters

Table 7 lists the oscillator parameters. For Table 7, TA = -40 °C to 85 °C unless otherwise indicated. VCC = 1.7 to 3.6V, TYP values at 25 °C and 3.0V. Table 7: Oscillator Parameters SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT FXT XI and XO pin Crystal Fre- quency 32.768 kHz FOF XT Oscillator failure detection frequency 8k H z CINX Internal XI and XO pin capac- itance 1p F CEX External XI and XO pin PCB capacitance 1p F OAXT XT Oscillation Allowance At 25°C using a 32.768 kHz crystal 270 320 k Ω FRCC Calibrated RC Oscillator Fre- quency(1) Factory Calibrated at 25°C, VCC = 2.8V 128 Hz FRCU Uncalibrated RC Oscillator Frequency Calibration Disabled (OFF- SETR = 0) 89 122 220 Hz JRCCC RC Oscillator cycle-to-cycle jitter Calibration Disabled (OFF- SETR = 0) – 128 Hz 2000 ppm Calibration Disabled (OFF- SETR = 0) – 1 Hz 500 AXT XT mode digital calibration accuracy(1) Calibrated at an initial tem- perature and voltage -2 2 ppm AAC Autocalibration mode timing accuracy, 512 second period, TA = -10°C to 60°C(1) 24 hour run time 35 ppm 1 week run time 20 1 month run time 10 1 year run time 3 TAC Autocalibration mode operat- ing temperature(2) -10 60 °C (1) Timing accuracy is specified at 25°C after digital calibration of the internal RC oscillator and 32.768 kHz crystal. A typical 32.768 kHz tuning fork crystal has a negative temperature coefficient with a parabolic frequency deviation, which due to the crystal alone can result in a change of up to 150 ppm across the entire operating temperature range of -40°C to 85°C in XT mode. Autocalibration mode timing accuracy is specified relative to XT mode timing accuracy from -10°C to 60°C. (2) Outside of this temperature range, the RC oscillator frequency change due to temperature may be outside of the allowable RC digital calibration range (+/-12%) for autocalibration mode.If this happens, an autocalibration failure will occur and the ACF interrupt flag is set. The AB08X5 should be switched to use the XT oscillator as its clock source. Please see the Autocalibration Fail section for more details.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 14 of 33 Abracon Drawing #453567 Revision: C

5.5 V CC Supply Current

Table 8 lists the current supplied into the VCC power input under various conditions. For Table 8, TA = -40 °C to 85 °C, VBAT = 0 V to 3.6 V TYP values at 25 °C, MAX values at 85 °C, VCC Power state Table 8: VCC Supply Current SYMBOL PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT IVCC:I2C VCC supply current during I 2C burst read/write 400kHz bus speed, 2.2k pull-up resistors on SCL/SDA(1) 3.0V 6 10 µA 1.8V 1.5 3 IVCC:SPIW VCC supply current during SPI burst write 2 MHz bus speed (2) 3.0V 8 12 µA 1.8V 4 6 IVCC:SPIR VCC supply current during SPI burst read 2 MHz bus speed (2) 3.0V 23 37 µA 1.8V 13 21 IVCC:XT VCC supply current in XT oscil- lator mode Time keeping mode with XT oscillator running(3) 3.0V 55 330 nA 1.8V 51 290 IVCC:RC VCC supply current in RC oscil- lator mode Time keeping mode with only the RC oscillator running (XT oscillator is off)(3) 3.0V 14 220 nA 1.8V 11 170 IVCC:ACAL Average V CC supply current in Autocalibrated RC oscillator mode Time keeping mode with only RC oscillator running and Auto- calibration enabled. ACP = 512 seconds(3) 3.0V 22 235 nA 1.8V 18 190 (1) Excluding external peripherals and pull-up resistor current. All other inputs (besides SDA and SCL) are at 0V or VCC. AB0805 only. Test conditions: Continuous burst read/write, 0x55 data pattern, 25 s between each data byte, 20 pF load on each bus pin. (2) Excluding external peripheral current. All other inputs (besides SDI, nCE and SCL) are at 0V or VCC. AB0815 only. Test conditions: Continuous burst write, 0x55 data pattern, 25 s between each data byte, 20 pF load on each bus pin. (3) All inputs and outputs are at 0 V or VCC

5.6 VBAT Supply Current

Table 9 lists the current supplied into the VBAT power input under various conditions. Figure 11 shows the typical VBAT power state operating current vs. temperature in XT mode. Figure 11. Typical VBAT Current vs. Temperature in XT Mode  For Table 9, TA = -40 °C to 85 °C, TYP values at 25 °C, MAX values at 85 °C, VBAT Power state. (1) Test conditions: All inputs and outputs are at 0 V or VCC.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 21 of 33 Abracon Drawing #453567 Revision: C

5.7 BREF Electrical Characteristics

Table 10 lists the parameters of the VBAT voltage thre sholds. BREF values other than those listed in the table are not supported.  For Table 10, TA = -20 °C to 70 °C, TYP values at 25 °C, VCC = 1.7 to 3.6V. Table 10: BREF Parameters SYMBOL PARAMETER BREF MIN TYP MAX UNIT VBRF VBAT falling threshold 0111 2.3 2.5 3.3 V 1011 1.9 2.1 2.8 1101 1.6 1.8 2.5 1111 1.4 VBRR VBAT rising threshold 0111 2.6 3.0 3.4 V 1011 2.1 2.5 2.9 1101 1.9 2.2 2.7 1111 1.6 VBRH VBAT threshold hysteresis 0111 0.5 V 1011 0.4 1101 0.4 1111 0.2 TBR VBAT analog comparator recom- mended operating temperature range All values -20 70 °C

5.8 I ²C AC Electrical Characteristics

Figure 16 and Table 11 describe the I2C AC electrical parameters. Figure 16. I²C AC Parameter Definitions

5.9 SPI AC Electrical Characteristics

Figure 17, Figure 18, and Table 12 describe the SPI AC electrical parameters. Figure 17. SPI AC Parameter Definitions – Input Figure 18. SPI AC Parameter Definitions – Output

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 24 of 33 Abracon Drawing #453567 Revision: C Table 12: SPI AC Electrical Parameters SYMBOL PARAMETER VCC MIN TYP MAX UNIT fSCL SCL input clock frequency 1.7V–3.6V 0.01 2 MHz tLOW Low period of SCL clock 1.7V–3.6V 200 ns tHIGH High period of SCL clock 1.7V–3.6V 200 ns tRISE Rise time of all signals 1.7V–3.6V 1 µs tFALL Fall time of all signals 1.7V–3.6V 1 µs tSU:NCE nCE low setup time to SCL 1.7V–3.6V 200 ns tHD:NCE nCE hold time to SCL 1.7V–3.6V 200 ns tSU:CE nCE high setup time to SCL 1.7V–3.6V 200 ns tSU:SDI SDI setup time 1.7V–3.6V 40 ns tHD:SDI SDI hold time 1.7V–3.6V 50 ns tSU:SDO SDO output delay from SCL 1.7V–3.6V 150 ns tHD:SDO SDO output hold from SCL 1.7V–3.6V 0 ns tHZ SDO output Hi-Z from nCE 1.7V–3.6V 250 ns tBUF nCE high time before a new transmission 1.7V–3.6V 200 ns

5.10 Power On AC Electrical Characteristics

Figure 19. Power On AC Electrical Characteristics

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 26 of 33 Abracon Drawing #453567 Revision: C 6. Tape and Reel Information D C B Detail A A G R = 4 mm R = 4 mm Detail B N L W2 (outer width at HUB) W3 (inner width at outer edge of reel) (thickness)T Detail A Detail B (inner width at HUB) REEL DRAWING R0.60REF 0.35REF R0.65 REF DETAIL A P2 P0 P1 A0 F W ø D0 ø D1 Detail A Y Y 3?REF SECTION Y‐Y CARRIER TAPE DRAWING

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 27 of 33 Abracon Drawing #453567 Revision: C Table 14: Tape and Reel Dimensions 330 x 178 x 12 mm Reel Dimensions 3x3 QFN Carrier Tape Dimensions Symbol MIN TYP MAX Units Symbol MIN TYP MAX Units T 2.3 2.5 2.7 mm B0 3.2 3.3 3.4 mm N 178.0 K0 0.9 1.0 1.1 L 330.0 K1 0.25 0.3 0.35 W2 18.4 D1 1.5 D 20.2 P2 1.9 2.0 2.1 A 10.0 A0 3.2 3.3 3.4 G 4.0 E1 1.65 1.75 1.85 B 1.5 F 5.4 5.5 5.6 W 11.7 12.0 12.3

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 29 of 33 Abracon Drawing #453567 Revision: C 8. Ordering Information Table 16: Ordering Information AB08X5 Orderable Part Numbers Package Temperature Range MSL Level(2) P/N Tape and Reel Qty AB0805-T3 3000pcs/reel Pb-Free(1) 16-Pin QFN 3 x 3 mm -40 to +85 °C 1 AB0815-T3 3000pcs/reel (1) Compliant and certified with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in raw homogeneous materials. The package was designed to be soldered at high temperatures (per reflow profile) and can be used in specified lead-free processes. (2) Moisture Sensitivity Level rating according to the JEDEC J-STD-020D.1 industry standard classifications.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 30 of 33 Abracon Drawing #453567 Revision: C 9. Notes i. The parts are manufactured in accordance with this specification. If other conditions and specifica- tions which are required for this specification, please contact ABRACON for more information. ii. ABRACON will supply the parts in accordance with this specification unless we receive a written request to modify prior to an order placement. iii. In no case shall ABRACON be lia ble for any product failure from inappropriate handling or operation of the item beyond the scope of this specification. iv. When changing your production proce ss, please notify ABRACON immediately. v. ABRACON Corporation’s products are COTS – Commercial-Off-The-Shelf products; suitable for Commercial, Industrial and, where designated, Automotive Applications. ABRACON’s products are not specifically designed for Military, Aviation, Aerospace, Life-dependant Medical applications or any application requiring high reliability where component failure could result in loss of life and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from ABRACON Corporation is required. Please contact ABRACON Cor- poration for more information. vi. All specifications and Marking will be subject to change without notice.

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 31 of 33 Abracon Drawing #453567 Revision: C 10. ABRACON CORPORATION – TERMS & CONDITIONS OF SALE The following are the terms and conditions under which Abracon Corporation (“AB”) agrees to sell, to the entity named on the face hereof (“Buyer”), the products specified on the face hereof (the “Products”). Notwithstanding Buyer’s desire to use standardized RFQs, purchase order forms, order forms, acknowledgment forms and other documents which may contain terms in addition to or at variance with these terms, it is expressly understood and agreed t hat other forms shall neither add to, nor vary, these terms whether or not these terms are referenced therei n. Buyer may assent to these terms by written acknowledgment, implication and/or by acceptance or payment of goods ordered any of which will constitute assent. Prices: Prices shown on the face hereof are in US dollars, with delivery terms specified herein and are exclusive of any other charges including, with out limitation, fe es for export, special packaging, freight, insurance and similar charges. AB reserves the right to increase the price of Products by writ- ten notice to Buyer at least thirty (30) days prior to the original date of shipment. When quantity price discounts are quoted by AB, the discounts are computed separately for each type of product to be sold and are based upon the quantity of each type and each size ordered at any one time. If any dis- counted order is reduced by Buyer with AB’s consent, the prices shall be adjusted to the higher prices, if applicable, for the remaining order. Taxes: Unless otherwise specified in the quotation, the prices do not include any taxes, import or export duties, tariffs, customs ch arges or any such other levies. Buyer agrees to reimburse AB the amount of any federal, state, county, municipal, or other taxes, duties, tariffs, or custom charges AB is required to pay. If Buyer is exempt from any su ch charges, Buyer must provide AB with appropriate documentation. 3. Payment Terms: For each shipment, AB will invoice Buyer for the price of the Products plus all appli- cable taxes, packaging, transportation, insurance and other charges. Unless otherwise stated in a separate agreement or in AB’s quotation, payments are due within thirty (30) days from the date of invoice, subject to AB’s approval of Buyer’s credit application. All invoicing disputes must be submit- ted in writing to AB within ten (10) days of the receipt of the invoice accompanied by a reasonably detailed explanation of the dispute. Payment of the undisputed amounts shall be made timely. AB reserves the right to require payment in advance or C.O.D. and otherwise modified credit terms. When partial shipments are made, payments for such shipments shall become due in accordance with the above terms upon submission of invoices. If, at the request of Buyer, shipment is postponed for more than thirty (30) days, payment will become due thirty days after notice to Buyer that Products are ready for shipment. An y unpaid due amounts will be subject to interest at one decimal five per- cent (1.5%) per month, or, if less, the maximum rate allowed by law. Delivery and Shipment : Shipment dates are estimates only. Failure to deliver by a specified date shall neither entitle Buyer to any compensation nor impose any liability on AB. AB reserves the right to ship and bill ten percent more or less than the exact quantity specified on the face hereof. All ship- ments will be made Ex Works as per Incoterms 2000 from AB’s place of shipment. In the absence of specific instructions, AB will select the carrier. Claims against AB for shortages must be made in writ- ing within ten (10) days after the arrival of the shipment. AB is not required to notify Buyer of the ship- ment. Buyer shall pay all freight charges, insurance and other shipping expenses. Freight charges, insurance and other shipping expenses itemized in advance of actual shipment, if any, are estimates only that are calculated on the basis of standard tariffs and may not reflect actual costs. Buyer must pay actual costs. Purchase Order Changes and Cancellations : Purchase orders for standard AB Products may not be canceled within sixty (60) days of the original shipping date. Purchase orders for non-standard AB Products are non-cancelable and non-returnable. All schedule changes must be requested at least thirty (30) days prior to original shipping date. Maximum schedule change “push-out” shall be no more than thirty (30) days from original shipping date. AB may terminate or cancel this order, in whole or in part, at any time prior to the completion of performance by written notice to Buyer without incur-

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 32 of 33 Abracon Drawing #453567 Revision: C ring any liability to Buyer fo r breach of contract or otherwise. AB reserves the right to allocate Prod- ucts in its sole discretion among Buyer and other po tential buyers, or defer or delay the shipment of any Product, which is in short supply due to any reason. 6. Title and Risk of Loss : AB’s responsibility for any loss or damage ends, and title passes, when Products are delivered Ex Works as per Incoterms 2 000 at AB’s designated shipping location to car- rier, to Buyer or to Buyer’s agent, whichever occurs first. 7. Packing: Packaging shall be AB’s standard shipping materials or as specified on the face hereof. Any cost of non-standard packaging and handling requested by Buyer shall be abided by AB provided Buyer gives reasonable prior notice and agrees in writing to pay additional costs. Security Interest: Buyer hereby grants AB a purchase money security interest in the Products sold and in the proceeds of resale of such Products until such time as Buyer has paid all charges. AB retains all right and remedies available to AB under the Uniform Commercial Code. Specifications: Specifications for each Product are the specifications specified in the published data- sheets of such Product, as of the date of AB’s quot ation (the “Specifications”). Except as otherwise agreed, AB reserves the right to modify the Specific ations at any time without adversely affecting the functionality. 10. Acceptance: Unless Buyer notifies AB in writing within ten (10) days from the date of receipt of Prod- ucts that the Products fail to co nform to the Specifications, the Products will be deemed accepted by Buyer. No such claim of non-conformity shall be valid if (i) the Products have been altered, modified or damaged by Buyer, (ii) the rejection notice fails to explain the non-conformance in reasonable detail and is not accompanied by a test report evidencing the non-conformity, or (iii) rejected Products are not returned to AB within thirty (30) days of rejection; provided, that no Product returns may be made without a return material authorization issued by AB. 11. Limited Warranties and Disclaimers: AB warrants to Buyer that each Product, for a period of twelve (12) months from shipment date thereof, will conform to the Specifications and be free from defects in materials and workmanship. AB’s sole liability and Buyer’s exclusive remedy for Products that fail to conform to this limited warranty (“Defective Product s”) is limited to repair or replacement of such Defective Products, or issue a credit or rebate of no more than the purchase price of such Defective Products, at AB’s sole option and election. This warranty shall not apply: (i) if Products have been damaged or submitted to abnormal conditions (mechani cal, electrical, or thermal) during transit, stor- age, installation, or use; or (ii) if Products are subject to Improper Use (as defined below); or (iii) if the non-conformance of Products results from misuse, neglect, improper testing, storage, installation, unauthorized repair, alteration, or excess usage at or beyond the maximum values (temperature limit, maximum voltage, and other Specification limits) defin ed by AB; (iv) to any other default not attribut- able to AB; or (v) removal, alteration, or tamperi ng of the original AB product labeling. This warranty does not extend to Products or components purchased from entities other than AB or AB’s authorized distributors or to third-party software or documentation that may be supplied with any Product. In the event no defect or breach of warranty is discovered by AB upon receipt of any returned Product, such Product will be returned to Buyer at Buyer’s expense and Buyer will reimburse AB for the transporta- tion charges, labor, and associated charges incurr ed in testing the allegedly Defective Product. The above warranty is for Buyer’s benefit only, and is non-transferable. OTHER THAN THE LIMITED WARRANTY SET FORTH ABOVE, AB MAKES NO WARRANTIES, EXPRESS, STATUTORY, IMPLIED, OR OTHERWISE AND SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICUL AR PURPOSE AND NON-INFRINGEMENT, TO THE MAXIMUM EXTENT PERMITTED BY LAW. WI THOUT LIMITING THE GENERALITY OF THE FOREGOING DISCLAIMERS, AB INCORPOR ATES BY REFERENCE ANY PRODUCT-SPECIFIC WARRANTY DISCLAIMERS SET FORTH IN THE PUBLISHED PRODUCT DATASHEETS. 12. Limitation of Liability : AB SHALL HAVE NO LIABILITY FOR LOSS ARISING FROM ANY CLAIM MADE AGAINST BUYER, OR FOR SPECIAL, INDIRECT, RELIANCE, INCIDENTAL, CONSEQUEN- TIAL, OR PUNITIVE DAMAGES INCLUDING, WITH OUT LIMITATION, LOSS OF USE, PROFITS, REVENUES, OR COST OF PROCUREMENT OF SUBSTITUTE GOODS BASED ON ANY BREACH

AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 33 of 33 Abracon Drawing #453567 Revision: C OR DEFAULT OF AB, HOWEVER CAUSED, AND UNDER ANY THEORY OF LIABILITY . BUYER’S SOLE REMEDY AND AB’S SOLE AND TOTAL LIABILITY FOR ANY CAUSE OF ACTION, WHETHER IN CONTRACT (INCLUDING BREACH OF WARRANTY) OR TORT (INCLUDING NEG- LIGENCE OR MISREPRESENTATION) OR UNDE R STATUTE OR OTHERWISE SHALL BE LIM- ITED TO AND SHALL NOT EXCEED THE AGGR EGATE AMOUNTS PAID BY BUYER TO AB FOR PRODUCTS WHICH GIVE RISE TO CLAIMS. BUYER SHALL ALWAYS INFORM AB OF ANY BREACH AND AFFORD AB REASONABLE OPPORT UNITY TO CORRECT ANY BREACH. THE FOREGOING LIMITATIONS SHALL APPLY REGARDLESS OF WHETHER AB HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND NOTWITHSTANDING THE FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY. 13. Improper Use: Buyer agrees and covenants that, without AB’s prior written approval, Products will not be used in life support systems , human implantation, nuclear fa cilities or systems or any other application where Product failure could lead to loss of life or catastrophic property damage (each such use being an “Improper Us e”). Buyer will indemnify and hold AB harmless from any loss, cost, or damage resulting from Improper Use of the Products. 14. Miscellaneous: In the event of any insolvency or inability to pay debts as they become due by Buyer, or voluntary or involuntary bankruptcy proceeding by or against Buyer, or appointment of a receiver or assignee for the benefit of creditors of Buyer, AB may elect to cancel any unfulfilled obligations. No Products or underlying information or technology ma y be exported or re-exported, directly or indi- rectly, contrary to US law or US Government export controls. AB will be excused from any obligation to the extent performance thereof is caused by, or ar ises in connection with, acts of God, fire, flood, riots, material shortages, strike s, governmental acts, disasters, earthquakes, inability to obtain labor or materials through its regular sources, delay in delivery by AB’s supplies or any other reason beyond the reasonable control of AB. In the event any one or more of the provisions contained herein shall for any reason be held to be invalid, illegal, or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other prov ision hereof and these term s shall be construed as if such invalid, illegal, or unenforceable provis ion had never been contained herein. A waiver of a breach or default under these terms shall not be a waiver of any subsequent default. Failure of AB to enforce compliance with any of these terms shall not constitute a waiver of such terms. These terms are governed by the laws of the State of California without reference to conflict of law principles. The federal and state courts located within the State of California will have exclusive jurisdiction to adjudi- cate any dispute arising out of these terms. END