SP791

The SP791 is a microprocessor (mP) supervisory circuit that monitors the power supplied to digital circuits such as microprocessors, microcontrollers, or memory. The SP791 is an ideal solution for portable, battery-powered equipment that require power supply monitoring. The SP791 watchdog functions will continuously oversee the operational status of a system. Implementing the SP791 will reduce the number of components and overall complexity in a design that requires power supply monitoring circuitry. The operational features and benefits of the SP791 are described in more detail below.

V_CC.........................................................-0.3V to +6V
VBATT.....................................................-0.3V to +6V
All Other Inputs .....................-0.3V to (VOUT + 0.3V)
Input Current
V_CC Peak........................................................... 1.0A
V_CC Continuous .............................................250mA
VBATT Peak ....................................................250mA
VBATT Continuous.............................................25mA
GND, BATT ON ................................................100mA
All Other Outputs .............................................25mA
Continuous Power Dissipation (TA = + 70)
Plastic DIP (derate 10.53mW/ above +70)
842mW
Narrow SO (derate 8.70mW/ above+70)
696mW
ESD Rating..........................................................4KV
Operating Temperature Ranges
SP791C ................................................0 to +70
SP791E .............................................-40 to +85
Storage Temperature Range...........-65 to +160
Lead Temperature (soldering,10sec).............+300

The SP791 is a microprocessor (mP) supervisory circuit that integrates a myriad of components involved in discrete solutions to monitor power-supply and battery-control functions in mP and digital systems. The SP791 offers complete mP 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 40mA. The 6ns chip-enable propagation delay, the 25mA current output in battery-backup mode, and the 250mA current output in standard operation also makes the SP791 suitable for larger scale, high-performance equipment.