SP791
SP791 is Low Power Microprocessor Supervisory with Battery Switch-Over manufactured by Sipex.
DESCRIPTION
The SP791 is a microprocessor (µP) supervisory circuit that integrates a myriad of ponents involved in discrete solutions to monitor power-supply and battery-control functions in µP and digital systems. The SP791 offers plete µP monitoring and watchdog functions. The SP791 is ideal for a low-cost battery management solution and is well suited for portable, battery-powered applications with its supply current of 40µA. The 6ns chip-enable propagation delay, the 25m A current output in battery-backup mode, and the 250m A current output in standard operation also makes the SP791 suitable for larger scale, high-performance equipment.
VOUT
15 RESET
1 VBATT 3 Vcc
_ 4.65V _ + + + 150m V
10 5
+ _
RESET GENERATION
_
LOWLINE BATT ON
+
_ SWT
V OUT
8 11
TIMEBASE FOR RESET AND WATCHDOG WATCHDOG TRANSITION DETECTOR
WATCHDOG TIMER
+ _
CHIP-ENABLE OUTPUT CONTROL
+ _ 1.25V
2V
CE OUT
CE IN
WDO WDPO
Figure 1. Block Diagram
SP791DS/08 SP791 Low Power Microprocessor Supervisory with Battery Switch-Over © Copyright 2000 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
Input Voltage (with respect to GND) VCC -0.3V to +6V VBATT -0.3V to +6V All Other Inputs -0.3V to (VOUT + 0.3V) Input Current VCC Peak 1.0A VCC Continuous 250m A VBATT Peak 250m A VBATT Continuous 25m A GND, BATT ON 100m A All Other Outputs 25m A Continuous Power Dissipation (TA = + 70o C) Plastic DIP (derate 10.53m W/o C above +70o C) 842m W Narrow SO (derate 8.70m W/o C above+70o C) 696m W ESD Rating 4KV Stresses beyond these listed...
