SN65LBC174A, SN75LBC174A

QUADRUPLE RS485 DIFFERENTIAL LINE DRIVERS

SLLS446C − OCTOBER 2000 − REVISED MAY 2003

3

POST OFFICE BOX 655303

equivalent input and output schematic diagrams

VCC

A or EN Input

1 k

Ω

9 V

Input

100 k

Ω

VCC

Output

16 V

Y or Z Output

16 V

20 V

17 V

16 V

16 V

−0.3 V to 6 V

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

Voltage range at any bus (DC)

−10 V to 15 V

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

Voltage range at any bus (transient pulse through 100

Ω, see Figure 8)

−30 V to 30 V

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

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

Electrostatic discharge: Human body model (see Note 2)

Y, Z, and GND

13 kV

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

All pins

5 kV

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

Charged-device model (see Note 3) All pins

1 kV

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

−65

°C to 150°C

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

Continuous power dissipation

See Dissipation Rating Table

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

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

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.

NOTES:

1. All voltage values, except differential I/O bus voltages, are with respect to GND.

2. Tested in accordance with JEDEC standard 22, Test Method A114-A.

3. Tested in accordance with JEDEC standard 22, Test Method C101.

DISSIPATION RATING TABLE

PACKAGE

JEDEC

BOARD

MODEL

TA ≤ 25°C

POWER RATING

DERATING FACTOR‡

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

16-PIN DW

Low K

1200 mW

9.6 mW/

°C

769 mW

625 mW

16-PIN DW

High K

2240 mW

17.9 mW/

°C

1434 mW

1165 mW

20-PIN DW

Low K

1483 mW

11.86 mW/

°C

949 mW

771 mW

20-PIN DW

High K

2753 mW

22 mW/

°C

1762 mW

1432 mW

16-PIN N

Low K

1150 mW

9.2 mW/

°C

736 mW

598 mW

‡ This is the inverse of the junction-to-ambient thermal resistance when board-mounted with no air flow.