5

LTC1232

sn1232 1232fas

TYPICAL PERFOR A CE CHARACTERISTICS

Reset Active Time vs Temperature

Time-Out Period vs Temperature

RST Output Voltage vs Supply Voltage

PI FU CTIO S

TOL is connected to GND, the reset pulse generator forces

pulse generator forces the reset outputs to active states as

TD: Time-Out Delay. TD is a three-level input to select three

different time-out periods. The time-out period is set by

the TD input to be 150ms with TD connected to GND,

600ms with TD left floating, and 1.2 seconds with TD

with a 0.1µF capacitor.

GND: Ground Pin.

PB RST: Logic Input to be Directly Connected to a Push-

Button. The PB RST input requires an active low signal

which is debounced and timed for a minimum of 40ms.

When this condition is satisfied, the reset pulse generator

forces the reset outputs to active states. The reset outputs

remain in active states for a minimum of 250ms after

PB RST is released from logic low level.

LTC1232 • TPC01

TEMPERATURE (˚C)

–50

4.61

4.62

4.63

25

75

4.60

4.59

–25

0

50

100

125

4.58

4.57

TOL = GND

LTC1232 • TPC02

TEMPERATURE (˚C)

–50

4.36

4.37

4.38

25

75

4.35

4.34

–25

0

50

100

125

4.33

4.32

LTC1232 • TPC03

TEMPERATURE (˚C)

–50

648

672

696

25

75

624

600

–25

0

50

100

125

576

552

LTC1232 • TPC04

TEMPERATURE (˚C)

–50

648

672

696

25

75

624

600

–25

0

50

100

125

576

552

TD = NO CONNECTION

LTC1232 • TPC05

SUPPLY VOLTAGE (V)

0

3

4

5

4

2

1

0

1

2

3

5

EXTERNAL PULL-UP = 10µA