IN

OUT

COMP

SENSE

INPUT

TIMER

SENSE

GND

SUPPLY

SUPPLY

GND

1

2

3

4

5

6

7

8

LM1949

SNLS349C – FEB 1995 – REVISED MARCH 2013

www.ti.com

Figure 2. Package Number P0008E

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings

(1) (2)

Supply Voltage

8V

Power Dissipation (3)

1235 mW

Input Voltage Range

−0.3V to VCC

Operating Temperature Range

−40°C to +125°C

Storage Temperature Range

−65°C to +150°C

Junction Temperature

150°C

Lead Temp. (Soldering 10 sec.)

260°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3)

For operation in ambient temperatures above 25°C, the device must be derated based on a 150°C maximum junction temperature and a

thermal resistance of 100°C/W junction to ambient.

Electrical Characteristics

(VCC = 5.5V, VIN = 2.4V, TJ = 25°C, Figure 1, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

ICC

Supply Current

Off

VIN = 0V

11

23

mA

Peak

Pin 8 = 0V

28

54

mA

Hold

Pin 8 Open

16

26

mA

VOH

Input On Level

VCC = 5.5V

1.4

2.4

V

VCC = 3.0V

1.2

1.6

V

VOL

Input Off Level

VCC = 5.5V

1.0

1.35

V

VCC = 3.0V

0.7

1.15

V

IB

Input Current

−25

3

+25

µA

IOP

Output Current

Peak

Pin 8 = 0V

−10

−22

mA

Hold

Pin 8 Open

−1.5

−5

mA

VS

Output Saturation Voltage 10 mA, VIN = 0V

0.2

0.4

V

VP

Sense Input

Peak Threshold

VCC = 4.75V

350

386

415

mV

VH

Hold Reference

88

94

102

mV

t

Time-out, t

t ÷ RTCT

90

100

110

%

2

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