SN55121, SN75121

DUAL LINE DRIVERS

SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998

3

POST OFFICE BOX 655303

6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage

6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage

6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation

See Dissipation Rating Table

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Case temperature for 60 seconds: FK package

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package

300

°C

. . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package

260

°C

. . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to both ground terminals connected together.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 125°C

POWER RATING

D

950 mW

7.6 mW/

°C

608 mW

—

FK‡

1375 mW

11.0 mW/

°C

880 mW

275 mW

J‡

1375 mW

11.0 mW/

°C

880 mW

275 mW

N

1150 mW

9.2 mW/

°C

736 mW

—

‡ In the FK and J packages, SN55121 chips are either silver glass or alloy mounted.

recommended operating conditions

SN55121

SN75121

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

4.75

5

5.25

V

High-level input voltage, VIH

2

2

V

Low-level input voltage, VIL

0.8

0.8

V

High-level output current, IOH

–75

–75

mA

Operating free-air temperature, TA

–55

125

0

70

°C