CAT811(2012) データシートの表示（PDF） - ON Semiconductor

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CAT811
(Rev.:2012)

4-Pin Microprocessor Power Supply Supervisors with Manual Reset

ON Semiconductor 

CAT811, CAT812

Table 1. THRESHOLD SUFFIX SELECTOR DESCRIPTION

Nominal Threshold Voltage

Threshold Suffix Designation

4.63 V

L

4.38 V

M

4.00 V

J

3.08 V

T

2.93 V

S

2.63 V

R

2.32 V

Z

Table 2. PIN DESCRIPTION

Pin Number

CAT811

CAT812

1

1

2

−

Pin Name

GND

RESET

−

2

RESET

3

3

MR

4

4

VCC

Description

Ground.

Active LOW reset. RESET is asserted if VCC falls below the reset threshold and re-

mains low for at least 140 ms after VCC rises above the reset threshold.

Active HIGH reset. RESET is asserted if VCC falls below the reset threshold and re-

mains high for at least 140 ms after VCC rises above the reset threshold.

Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains active as

long as MR is LOW and for 140 ms after MR returns HIGH. The active low input has

an internal 20 kW pull−up resistor. The input should be left open if not used.

Power supply voltage that is monitored.

MR

VCC

VCC

TOLERANCE

+

BIAS

–

VCC

RESET

&

DIGITAL

DELAY

VOLTAGE

REFERENCE

GND

CAT811

RESET

MR

VCC

VCC

TOLERANCE

+

BIAS

–

RESET

&

DIGITAL

DELAY

VCC

RESET

VOLTAGE

REFERENCE

GND

CAT812

Figure 1. Block Diagrams

http://onsemi.com

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