OF

Copyright © 1994

Rev. 1.3

1/96

FOR FUR THER INFORMA TION CALL (714) 898-8121

SG3546

1

P ACKAGE ORDER INFORMA TION

T

Plastic SOIC

8-pin

0 to 70

SG3546DM

SG3546LP

DM

Plastic TO-92

3-pin

LP

DESCRIPTION

The SG3546 is an undervoltage sensing

circuit specifically designed for use as

a reset controller in 3.3V

microprocessor-based applications. Its

micropower operation makes this

device ideal for portable applications

where extended battery life is required.

The device offers a 1.2V temperature

compensated bandgap reference, a

KEY FEA TURES

s LOW STANDBY CURRENT

s INTERNAL VOLTAGE THRESHOLD AT 2.95V

s TEMPERATURE COMPENSATED BANDGAP

REFERENCE

s PRECISION COMPARATOR WITH 40MV OF

HYSTERESIS

s CLAMP DIODE FOR DISCHARGING DELAY

CAPACITOR

s OUTPUT CURRENT SINK CAPABILITY

(typ 5mA)

s 1-10V INPUT SUPPLY RANGE

s AVAILABLE IN 150MIL, 8-PIN SOIC AND

3-PIN TO-92 PACKAGES

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. SG3546DMT)

PRODUCT HIGHLIGHT

precision comparator with hysteresis

and a high-current open collector

output. This device operates from 1 to

10V input supply and drains <10µA in

the non-fault condition.

The SG3546 is available in an 8-pin

150mil SOIC package or a 3-pin TO-92

package and is rated for an ambient

temperature of 0°C to 70°C.

POWER

SUPPLY

1.2 V

REF

MICROPROCESSOR

CIRCUIT

RESET

C

DLY

R

2

1

3