CAT811 Datasheet, PDF (3/11 Pages) Catalyst Semiconductor – 4-Pin Microprocessor Power Supply Supervisors

CAT811, CAT812
PIN DESCRIPTIONS
Pin Number
CAT811 CAT812
1
1
2
—
—
2
3
3
4
4
Name Description
GND Ground
RESET
RESET
Active LOW reset. RESET is asserted if V_CC falls below the reset threshold
and remains low for at least 140ms after V_CC rises above the reset threshold.
Active HIGH reset. RESET is asserted if V_CC falls below the reset
threshold and remains high for at least 140ms after V_CC rises above
the reset threshold.
MR
Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains
active as long as MR is LOW and for 140ms after MR returns HIGH. The
active low input has an internal 20kΩ pull-up resistor. The input should be left
open if not used. It can be driven by TTL or CMOS logic or shorted to ground
by a switch.
V_CC
Power supply voltage that is monitored.
Patent Pending
3
Doc. No. 3005, Rev. P