CAT812 Catalyst Semiconductor, CAT812 Datasheet - Page 2

• Manufacturer Part Number: CAT812
• Description: 4-pin Microprocessor Voltage Supervisor
• Manufacturer: Catalyst Semiconductor

CAT811, CAT812
PIN DESCRIPTION
BLOCK DIAGRAM
Doc. No. MD-3005 Rev. S
CAT811
—
Pin Number
1
2
3
4
CAT812
—
1
2
3
4
V
V
MR
MR
CC
CC
¯¯¯¯¯¯
RESET
RESET
Name
GND
¯¯¯
MR
V
CC
TOLERANCE
TOLERANCE
BIAS
BIAS
Description
Ground
Active LOW reset. RESET
and remains low for at least 140ms after V
Active HIGH reset. RESET is asserted if V
and remains high for at least 140ms after V
threshold.
Manual Reset Input. A logic LOW on MR
active as long as MR
active low input has an internal 20kΩ pull-up resistor. The input should be
left open if not used.
Power supply voltage that is monitored.
V
V
CC
CC
REFERENCE
REFERENCE
VOLTAGE
VOLTAGE
+
–
+
–
¯¯¯ is LOW and for 140ms after MR
¯¯¯¯¯¯ is asserted if V
2
GND
GND
DIGITAL
DIGITAL
RESET
DELAY
RESET
DELAY
&
&
¯¯¯ asserts RESET. RESET remains
CAT811
CAT812
CC
V
V
CC
CC
CC
CC
CC
falls below the reset threshold
rises above the reset threshold.
falls below the reset threshold
rises above the reset
Characteristics subject to change without notice
¯¯¯ returns HIGH. The
RESET
RESET
© Catalyst Semiconductor, Inc.