GENERAL DESCRIPTION

The M62023L/P/FP is a system reset IC that controls the memory backup function of an SRAM and an embedded RAM of a microcontroller.

The IC outputs reset signals (RES/RES) to a microcontroller at power-down and power failure. It also shifts the power supply to RAMs from main to backup, outputs a signal (CS) that invokes standby mode, and alters RAMs to backup circuit mode.

FEATURES

• Built-in switch for selection between main power supply and back up power supply to RAMs

• Small difference between input and output voltages (IOUT=80mA, VIN=3V) : 0.15V typ

• Detection voltage (power supply monitor voltage) : 2.57V typ

• Chip select signal output (CS)

• Two channels of reset outputs (RES/RES)

• Power on reset circuit

APPLICATION

Power supply control systems for memory of microcontroller systems in electronic equipment such as OA equipment, industrial equipment, and home-use electronic appliances and SRAM boards with built-in backup function that require switching between external power supply and battery.