SP703

SP703 SIPEX | Alldatasheet

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SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation SP703/SP704 Low Power Microprocessor Supervisory with Battery Switch-Over The SP703/704 devices are 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 SP703/704 devices include a manual reset input, a µP reset and backup-battery switchover, and power- failure warning. The series is ideal for applications in computers, controllers, intelligent instruments and automotive systems. All designs where it is critical to monitor the power supply to the µP and its related digital components will find the series to be an ideal solution. n Precision Voltage Monitor: SP703 at 4.65V SP704 at 4.40V n Reset Time Delay - 200ms n Debounced TTL/CMOS - Compatible Manual - Reset Input n Minimum component count n 60µA Maximum Operating Supply Current n 0.6µA Maximum Battery Backup Current n 0.1µA Maximum Battery Standby Current n Power Switching 250mA Output in V CC Mode (0.6Ω ) 25mA Output in Battery Mode (5Ω ) n Voltage Monitor for Power Fail or Low Battery Warning n Available in 8 pin SO and DIP packages n RESET asserted down to VCC = 1V n Pin Compatible Upgrades to MAX703/MAX704

DESCRIPTION

1.25V 1.25V BATTERY SWITCHOVER CIRCUITRY PFI MR VCC VBATT RESET GENERATOR VOUT RESET PFO

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation 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: SPECIFICATIONS SRETEMARAP. NIM. PYT. XAMS TINUS NOITIDNOC ,egnaRegatloVgnitarepO0 5 .5s tloV V CC Vro TTAB 1ETON, I,tnerruCylppuS YLPPUS ,5 30 6 µAI gnidulcxe TUO I YLPPUS ,edoMpukcaByrettaBni V CC V,V0= TTAB V8.2= 100.06 .0 µA V TTAB 2ETON,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 56.4 04.4 57.4 05.4 stloV 307PS 407PS

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation 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 1.0 400.0 4.0 3.0 stloVI KNIS Am2.3= I KNIS 05= µ V,A CC V0.1= dlohserhTtupnIRM WOL HGIH0 .2 8.0V htdiWesluPmuminiMRM0 51s n yaleDTESERotRM0 52s n tnerruCpUlluPRM0 010 520 06A µV 0=RM dlohserhTtupnIIFP0 02.10 52.10 03.1s tloV 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: Either VCC or VBATT can go to 0V if the other is greater than 2.0V. NOTE 2: "-" equals the battery-charging current, "+" equals the battery-discharging current. SPECIFICATIONS (continued)

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation PIN ASSIGNMENTS Pin 1 —VOUT — Output Supply Voltage. VOUT connects to VCC when VCC is greater than V BATT and VCC is above the reset thresh- old. When VCC falls below VBATT and V CC is below the reset threshold, VOUT connects to VBATT . Connect a 0.1µF ca- pacitor from VOUT to GND. Pin 2 — VCC — +5V Supply Input Pin3 — GND — Ground reference for all signals Pin 4 — PFI — Power-Fail Input. This is the noninverting input to the power-fail com- parator. When PFI is less than 1.25V, PFO goes low. Connect PFI to GND or V OUT when not used. Pin 5 — PFO — Power-Fail Output. Pin 6 — MR — Manual Reset Input. This input generates a reset pulse when pulled below 0.8V. This active LOW input is TTL/ CMOS compatible and can be shorted to ground with a switch. It has an internal 250µA (typical) pull-up current. Leave this pin floating when not used. Pin 7 — RESET (Active Low)– Reset Output. RESET Output goes low whenever V CC falls below the reset threshold or whenever MR is pulled below 0.8V for longer than 150nS. RESET remains low for 200ms after V CC crosses the reset threshold voltage on power-up or after being triggered by MR. Pin 8 — V BATT — Backup-Battery Input. When V CC falls below the reset threshold, VBATT will be switched to VOUT if VBATT is 20mV greater than VCC . When VCC rises 20mV above VBATT , VOUT will be recon- nected to VCC . The 40mV hysteresis pre- vents repeated switching if VCC falls slowly. PINOUT INTERNAL BLOCK DIAGRAM VOUT VCC GND PFI VBATT RESET MR PFO 4 5 1.25V 1.25V BATTERY SWITCHOVER CIRCUITRY PFI MR VCC VBATT RESET GENERATOR VOUT RESET PFO

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation VCC Supply Current vs. Temperature (Normal Mode) Battery Supply Current vs. Temperature (Backup Mode) -60 -30 0 30 60 90 120 150 VCC Current (µA) Temperature Deg. C 2.9 2.4 1.9 1.4 0.9 0.4 -0.1 VBATT Current (µA) -60 Temperature Deg. C -40 -20 0 20 40 60 80 100 120140 VCC=5V VBATT=2.8V VCC=0V VBATT=2.8V TYPICAL CHARACTERISTICS (25oC, unless otherwise noted) -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 VBATT Current(µA) Log Scale .0000 5.000 VCC (0.5V/div) Battery Current vs. VCC Voltage VBATT=2.8V SP703 -60 -30 0 30 60 90 120 150 -60 -30 0 30 60 90 120 150

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation THEORY OF OPERATION 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 SP703/704 assert reset during power-up and prevent code execution errors during power- down or brownout conditions. On power-up, once VCC 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 VCC dips below the reset threshold, RESET is triggered. Each time RESET is trig- gered, 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 manual reset

FEATURES

The SP703/704 devices provide four key func- tions: 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 manual reset has been pulled below 0.8V for at least 150ns. 4. A 1.25V threshold detector for power-fail warning, low battery detection, or to monitor a power supply other than +5V. The SP703/704 devices differ only in their supply voltage monitor level. The SP703 generates a reset when V CC drops below 4.65V while the SP704 generates a reset below 4.4V. The SP703/704 devices 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 its related digital components will find the SP703/704 ideal. Figure 8. Typical Operating Circuit

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 9. BACKUP-BATTERY Switchover Block Diagram

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation D ALTERNATE END PINS (BOTH ENDS) D1 = 0.005" min. (0.127 min.) E PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) A = 0.210" max. (5.334 max). C ØL A1 = 0.015" min. (0.381min.) B e = 0.100 BSC (2.540 BSC) eA = 0.300 BSC (7.620 BSC) B C D E L Ø 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 8–PIN

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) 8–PIN A Ø LBe h x 45° A B D E e H h L Ø 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988)

0.050 BSC

(1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)

SP703/704DS/07 SP703/704 Low Power Microprocessor Supervisory © Copyright 2000 Sipex Corporation

ORDERING INFORMATION

Model Temperature Range Package Types Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising 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. Please consult the factory for pricing and availability on a Tape-On-Reel option. Sipex Corporation Headquarters and Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600