M62021FP Datasheet PDF

MITSUBISHI M62021L,P,FP SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP DESCRIPTION The M62021 is a s...

MITSUBISHI M62021L,P,FP SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP DESCRIPTION The M62021 is a system IC that controls the memory backup function of SRAM and 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. The M62021 contains,in a single chip,power supply monitor and RAM backup functions needed for a microcomputer system,so that the IC makes it possible to construct a system easily and with fewer components compared with a conventional case that uses individual ICs and discrete components. PIN CONFIGURATION (TOP VIEW) 8 7 6 5 4 3 2 1 CS RES GND RES Ct(DELAY CAPACITANCE) VIN VBAT VOUT FEATURES Built-in switch for selection between main power supply and backup power supply to RAM. Small difference between input and output voltage (IOUT=80mA,VIN=5V)0.2V typ Detection voltage (power supply monitor voltage)4.40V±0.2V 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 VOUT VBAT VIN Ct(DELAY CAPACITANCE) Outline 8P5(L) 1 2 3 4 8 7 6 5 CS RES GND RES Outline 8P4(P) 8P2S-A(FP) APPLICATION Power supply control systems for memory backup of microcomputer s...