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M62021 데이터시트

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M62021 System Reset IC with Switch for Memory Backup Renesas
Renesas Electronics Renesas
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Description
The M62021 is a system IC that controls the memory backup function of microcomputer (internal RAM).
The IC outputs reset signals (RES/RES) to a microcomputer at power-down and power failure. It also shifts the power supply to RAM from main to backup, outputs a signal (CS) that invokes standby mode, and alters RAM to backup circuit mode.

Features
•  Built-in switch for selection between main power supply and backup power supply to RAM.
•  Small difference between input and output voltage (IOUT= 80 mA, VIN = 5 V) 0.2 V Typ
•  Detection voltage (power supply monitor voltage) 4.40 V ±0.2 V
•  Chip select signal output (CS)
•  Two channels of reset outputs (RES/RES)
•  Power on reset circuit built-in
•  Delay time variable by an external capacitance connected to Ct pin
•  Facilitates to form backup function with a few number of components

Application
•  Power supply control systems for memory backup of microcomputer system and SRAM boards with built-in backup function that require switching between external power supply and battery.

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