805L

SP690A_04 SIPEX | Alldatasheet

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Technical content

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation SP690A/692A/802L/ 802M/805L/805M Low Power Microprocessor Supervisory with Battery Switch-Over The SP690A/692A/802L/802M/805L/805M are a family of microprocessor (µP) supervisory circuits that integrate a myriad of components involved in discrete solutions to monitor power- supply and battery-control functions in µP and digital systems. The series will significantly improve system reliability and operational efficiency when compared to discrete solutions. The features of the SP690A/692A/802L/802M/805L/805M include a watchdog timer, a µP reset and backup-battery switchover, and power-failure warning, a complete µP monitoring and watchdog solution. The series is ideal for applications in automotive systems, computers, controllers, and intelligent instruments. All designs where it is critical to monitor the power supply to the µP and it’s related digital components will find the series to be an ideal solution.

FEATURES

■ Precision Voltage Monitor: SP690A/SP802L/SP805L at 4.65V SP692A/SP802M/SP805M at 4.40V ■ Reset Time Delay - 200ms ■ Watchdog Timer - 1.6 sec timeout ■ Minimum component count ■ 60µA Maximum Operating Supply Current ■ 0.6µA Maximum Battery Backup Current ■ 0.1µA Maximum Battery Standby Current ■ Power Switching 250mA Output in V CC Mode (0.6Ω) 25mA Output in Battery Mode (5Ω) ■ Voltage Monitor for Power Fail or Low Battery Warning ■ Available in 8 pin SO and DIP packages ■ RESET asserted down to VCC = 1V

DESCRIPTION

dlohserhTd lohserhT dlohserhT dlohserhTd lohserhT TESER ycaruccAy caruccA ycaruccA ycaruccAy caruccA evitcATESER ycaruccAIFP A096PSV 56.4V m521W OL% 4 A296PSV 04.4V m521W OL% 4 L208PSV 56.4V m57W OL% 2 M208PSV 04.4V m57W OL% 2 L508PSV 56.4V m521H GIH% 4 M508PSV 04.4V m521H GIH% 4 4 5

8 PIN NSOICVOUT

RESET (RESET)* WDI PFO *SP805 only Now Available in Lead Free Packaging ■ Pin Compatible Upgrades to MAX690A/692A/802L/802M/805L

APPLICATIONS

■ Critical µP Power Monitoring ■ Intellegent Instruments ■ Computers ■ Controllers

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifica- tions below is not implied. Exposure to absolute maxi- mum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. V Input Current: Output Current:

ELECTRICAL CHARACTERISTICS

unless otherwise noted. SRETEMARAP. NIM. PYT. XAMS TINUS NOITIDNOC ,egnaRegatloVgnitarepO0 5 .5s tloV V CC Vro TTAB 2etoN, I,tnerruCylppuS YLPPUS ,5 30 6 µA Ignidulcxe TUO I YLPPUS ,edoMpukcaByrettaBni V CC V,V0= TTAB V8.2= 100.06 .0 µA V TTAB 3ETON,tnerruCybdnatS1 .0- 20.0 µA V CC V> TTAB V2.0+ V TUO tuptuOV CC 1.0-V CC 30.0- V CC 51.0- stloV I TUO Am05= I TUO Am052= V TUO edoMpukcaB-yrettaBni V CC V< TTAB V2.0- V TTAB 51.0-V TTAB 40.0- V TTAB 02.0- stloV I TUO Am5= I TUO Am52= ,dlohserhThctiwSyrettaB V CC Vot TTAB 02- Vm pu-rewoP nwod-rewoP siseretsyHrevohctiwSyrettaB0 4V mk aePotkaeP dlohserhTteseR0 5.4 52.4 55.4 03.4 56.4 04.4 57.4 05.4 07.4 54.4 stloV L508PS,L208PS,A096PS M508PS,M208PS,A296PS T,L208PS A V,C°52+= CC gnillaf T,M208PS A V,C°52+= CC gnillaf

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation SRETEMARAP. NIM. PYT. XAMS TINUS NOITIDNOC siseretsyHdlohserhTteseR0 4V mk aePotkaeP t,htdiWesluPteseR SR 0410 020 82s m ,egatloVtuptuOTESERV CC 5.1-I ECRUOS 008= µA 5ETON1 .04 .0s tloVI KNIS Am2.3= 400.03 .0I KNIS 05= µ V,A CC 0.1= ,egatloVtuptuOTESER8 .0I ECRUOS 4= µ V,A CC ,V0.1= 6ETONV CC 5.1-s tloVI ECRUOS 008= µA 1.04 .0I KNIS Am2.3= t,tuoemiTgodhctaW DW 00.10 6.15 2.2c es t,htdiWesluPIDW PW 05s nV LI V,V4.0= HI V()8.0(= CC ) ,dlohserhTtupnIIDW V CC 4ETON,V5=5 .3 8.0 stloV wolcigoL hgihcigoL tnerruCtupnIIDW 051- 05- 051 µA V=IDW CC V0=IDW dlohserhTtupnIIFP0 02.1 522.1 052.1 052.1 003.1 572.1 stloV M/L508PS,A296/A096PS M/L208PS tnerruCtupnIIFP5 2-1 0.05 2A n egatloVtuptuOOFPV CC 5.1- 1.04 .0 stloV I ECRUOS 008= µA I KNIS Am2.3= NOTE 1: The input voltage limits on PFI (pin 4) and WDI (pin 6) may be exceeded if the current into these pins is limited to less than 10 mA. NOTE 2: Either V CC or VBATT can go to 0V if the other is greater than 2.0V. NOTE 3: "-" equals the battery-charging current, "+" equals the battery-discharging current. NOTE 4: WDI is guaranteed to be in an intermediate, non-logic level state if WDI is floating and VCC is in the operating voltage range. WDI is internally biased to 35% of VCC with an input impedance of 50K Ω. NOTE 5: SP690A, SP692A, SP802L, and SP802M only. NOTE 6: SP805L and SP805M only. NOTE 7: WDI Minimum Rise/Fall time is 2µs. unless otherwise noted. NOTE 7

Pin 5 — PFO — Power-Fail Output. buffer, the watchdog feature is disabled. Figure 10. Pinout

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation VCC Supply Current vs. Temperature (Normal Mode) Battery Supply Current vs. Temperature (Backup Mode) -60 -30 0 30 60 90 120 150 V CC Current ( µA) Temperature Deg. C 2.9 2.4 1.9 1.4 0.9 0.4 -0.1 V BATT Current ( µA) -60 Temperature Deg. C -40 -20 0 20 40 60 80 100 120 140 VCC=5V VBATT=2.8V VCC=0V VBATT=2.8V TYPICAL PERFORMANCE CHARACTERISTICS -60 -30 0 30 60 90 120 150 Temperature Deg. C PFI Threshold vs. Temperature 1.256 1.254 1.252 1.250 1.248 1.246 PFI Threshold (V) VCC=5V VBATT=0 NO LOAD ON PFO VBATT to VOUT ON Resistance vs. Temperature VCC to VOUT On Resistance vs. Temperature Resistance (ohms) -60 -30 0 30 60 90 120 150 Temperature Deg. C 0.9 0.8 0.7 0.6 0.5 0.4 0.3 Resistance (ohms) Temperature Deg. C VBATT=2.8V VBATT=4.5V VCC=0V VBATT=2V Reset Threshold vs. Temperature 4.70 4.69 4.68 4.67 4.66 4.65 4.64 4.63 4.62 4.61 4.60 Reset Threshold (V) Temperature Deg. C VBATT=0V Power Down VCC=5V VBATT=0V Reset Output Resistance vs. Temperature Reset Delay vs. Temperature 600 500 400 300 200 100 Resistance (ohms) -60 -30 0 30 60 90 120 150 Temperature Deg. C 212 210 208 206 204 202 200 Reset Delay (mS) -60 -30 0 30 60 90 120 150 Temperature Deg. C VCC=5V,VBATT=2.8V Soucing Current VCC=0V to 5V Step, VBATT=2.8V VCC=0V,VBATT=2.8V Sink Current IE+2 IE+1 IE+0 IE-1 IE-2 IE-3 IE-4 IE-5 IE-6 IE-7 IE-8 V BATT Current( µA) Log Scale .0000 5.000 VCC (0.5V/div) Battery Current vs. VCC Voltage VBATT=2.8V SP690A -60 -30 0 30 60 90 120 150 -60 -30 0 30 60 90 120 150 (25oC, unless otherwise noted)

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation THEORY OF OPERATION The SP690A/692A/802L/802M/805L/805M microprocessor (µP) supervisory circuits monitor the power supplied to digital circuits such as microprocessors, microcontrollers, or memory. The series is an ideal solution for portable, battery-powered equipment that requires power supply monitoring. Implementing this series will reduce the number of components and overall complexity. The watchdog functions of this product family will continuously oversee the operational status of a system. The operational features and benefits of the SP690A/692A/802L/802M/805L/805M are described in more detail below. Reset Output The microprocessor's (µP's) reset input starts the µP in a known state. When the µP is in an unknown state, it should be held in reset. The SP690A/SP692A/SP802 assert reset during power-up and prevent code execution errors during power-down or brownout conditions. On power-up, once V CC reaches 1V, RESET is guaranteed to be a logic low. As VCC rises, RESET remains low. When VCC exceeds the reset threshold, RESET will remain low for 200ms, Figure 9. If a brownout condition occurs and V CC dips below the reset threshold, RESET is triggered. Each time RESET is triggered, it stays low for the reset pulse width interval. If a brownout condition interrupts a previously initiated reset pulse, the reset pulse continues for another 200ms. On power-down, once V CC goes below the threshold, RESET is guaranteed to be logic low until VCC drops below 1V. RESET is also triggered by a watchdog timeout. If WDI remains either high or low for a period that exceeds the watchdog timeout period (1.6 sec), RESET pulses low for 200mS. As long as RESET is asserted, the watchdog timer remains clear. When RESET comes high, the watchdog resumes timing and must be serviced within 1.6sec. If WDI is tied high or low, a RESET pulse is triggered every 1.8sec (t WD plus tRS ). The SP690A/692A/802L/802M/805L/805M provide four key functions: 1. A battery backup switching for CMOS RAM, CMOS microprocessors, or other logic. 2. A reset output during power-up, power-down and brownout conditions. 3. A reset pulse if the optional watchdog timer has not been toggled within a specified time. 4. A 1.25V threshold detector for power-fail warning, low battery detection, or to monitor a power supply other than +5V. The parts differ in their reset-voltage threshold levels and reset outputs. The SP690A/802L/ 805L generate a reset when the supply voltage drops below 4.65V. The SP692A/802M/805M generate a reset below 4.40V. The SP690A/692A/802L/802M/805L/805M are ideally suited for applications in automotive systems, intelligent instruments, and battery- powered computers and controllers. All designs into an environment where it is critical to monitor the power supply to the µP and it’s related digital components will find the SSP690A/692A/802L/802M/805L/805M ideal. Figure 12. Typical Operating Circuit

SET output, and is valid with VCC down to 1V. The watchdog circuit monitors the µP's activity. (WDI) within 1.6sec, a reset pulse is triggered. is driven high or low, the timer starts counting. It can detect pulses as short as 50ns. to conserve backup-battery power. the RAM is assured to have power if VCC fails. reset threshold and VBATT is greater than VCC . off and the supply current falls to less than 0.6µA. Figure 13. BACKUP-BATTERY Switchover Block Diagram

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation INDEX AREA b N 1 23 N/2 c eA eB E SYMBOL MIN NOM MAX A- - 0.21 A1 0.15 - - A2 0.115 0.13 0.195 b 0.014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c 0.008 0.01 0.014 D 0.355 0.365 0.4 D1 0.005 - - E 0.3 0.31 0.325 E1 0.24 0.25 0.28 e eA eB - - 0.43 L 0.115 0.13 0.15 Note: Dimensions in (mm) .100 BSC .300 BSC

8 PIN PDIP JEDEC MS-001 (BA) Variation

D A L b e c PACKAGE: 8 PIN PDIP

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation A A1 A2 SIDE VIEW Seating Plane SECTION B-B WITH PLATING SYMBOL MIN NOM MAX A1 . 3 5 - 1.75 A1 0.1 - 0.25 A2 1.25 - 1.65 b0 . 3 1 - 0.51 c0 . 1 7 - 0.24 D E e L0 . 4 - 1 .27 ø0 º - 8 º ø1 5º - 15º Note: Dimensions in (mm)

8 Pin NSOIC JEDEC MO-012 (AA) Variation

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

1.04 REF

0.25 BSC

L ØØ1 Ø Seating Plane VIEW C TOP VIEW b SEE VIEW C B B E E/2 INDEX AREA (D/2 X E1/2) E1/2 D e c BASE METAL b PACKAGE: 8 PIN NSOIC

Date: 11/29/04 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2004 Sipex Corpor ation

ORDERING INFORMATION

Model Temperature Range Package Types Corporation ANALOG EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability aris ing out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. Sipex Corporation Headquarters and Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 /TR = Tape and Reel Pack quantity 2,500 for NSOIC. Available in lead free packaging. To order add “-L” suffix to part number. Example: SP802LCN/TR = standard; SP802LCN-L/TR = lead free CLICK HERE TO ORDER SAMPLES