M62021 Mitsubishi, M62021 Datasheet - Page 4

• Manufacturer Part Number: M62021
• Description: SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP
• Manufacturer: Mitsubishi

+5V
(MAIN POWER SUPPLY)
APPLICATION EXAMPLE
EXPLANATION OF TERMINALS
Pin No.
4
6
8
1
2
3
5
7
Symbol
V
V
GND
RES
V
RES
BAT
CS
Ct
OUT
CPU
IN
V
DD
C
IN
Power supply output
Power supply input
Delay capacitor connection pin
Positive reset output
Backup power supply input
Ground
Negative reset output
Chip select output
RES
RES
V
IN
7
5
3
Name
SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP
R1
R2
1.24V
+
-
Com
Reference for all signals
Connect to the negative reset input of a microcomputer.The pin is capable
of flowing 1mA sink current
V
through V
The pin is capable of outputting up to 100mA.Use it as V
and the like
Backup power supply is connected to this pin
If a lithium battery is used,insert a resistor in series for safety purposes
A delay capacitor is connected to this pin.By connecting a capacitor,it is
possible to delay each output
Connect to the positive reset input of a microcomputer.The pin is capable
of flowing 1mA sink current
Connect to the chip select of RAM.The CS output is at low level in normal
state thereby letting RAM be active.Under failure or backup condition,the CS
output is set to high level,then RAM enters standby state disabling read/write
function.The pin is capable of flowing a 1mA sink current
M62021
*Capacitance to be connected:C
*If connecting a zener diode,select one of VZ=2~3V
+5V input pin.Connect to a logic power supply.
IN
and V
RESET
CIRCUIT
MITSUBISHI
DELAY
CIRCUIT
6
BAT
OUT
ELECTRIC
GND
are controlled by means of an internal switch and output
D1
1
2
8
4
V
V
CS
Ct
BAT
OUT
MITSUBISHI<Dig.Ana.INTERFACE>
IN
M62021L,P,FP
Function
BATTERY
3V
:10µF;C
V
IN
OUT
CONT
CMOS
RAM
:4.7µF;Ct:4.7µF
V
DD
DD
(
of CMOS RAM
4
/ 9 )