TL145406

TRIPLE RS-232 DRIVERS/RECEIVERS

SLLS185D – DECEMBER 1994 – REVISED JULY 2001

2

POST OFFICE BOX 655303

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

1RY

15

2RY

13

3RY

11

1DA

14

2DA

12

3DA

10

1RA

2

2RA

4

3RA

6

1DY

3

2DY

5

3DY

7

logic diagram (positive logic)

Typical of Each Receiver

Typical of Each Driver

RA

DY

RY

DA

2, 4, 6

3, 5, 7

15, 13, 11

14, 12, 10

schematic (each driver)

DYx

Output

320

Ω

68.5

Ω

3.3 k

Ω

10.4 k

Ω

To Other Drivers

VSS

To Other

Drivers

GND

4.2 k

Ω

Input

DAx

VDD

75.8

Ω

9.4 k

Ω

11.6 k

Ω

To Other Drivers

Resistor values shown are nominal.

ESD

ESD

ESD

ESD