M62023L_07 Datasheet, PDF (1/13 Pages) Renesas Technology Corp – System Reset IC with Switch for 3V Memory Back-up

M62023L/P/FP
System Reset IC with Switch for 3V Memory Back-up
REJ03D0528-0200
Rev.2.00
Jun 15, 2007
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 backup power supply to RAMs
• Small difference between input and output voltages (I_OUT = 80mA, V_IN=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.
Block Diagram
VIN 3
R1
R2
SW
Com
Reset Circuit
1.24V
1 VOUT
D1
2 VBAT
8 CS
RES 7
RES 5
Delay Circuit
6
GND
4 ^Ct
REJ03D0528-0200 Rev.2.00 Jun 15, 2007
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