SN75C188

QUADRUPLE LOW-POWER LINE DRIVERS

SLLS033F – JANUARY 1988 – REVISED MARCH 1997

2

POST OFFICE BOX 655303

4Y

3Y

2Y

1Y

13

12

10

9

5

4

2

4B

4A

3B

3A

2B

2A

1A

11

8

6

3

† This symbol is in accordance with ANSI/IEEE Std 91-1984

and IEC Publication 617-12.

&

logic diagram (positive logic)

4Y

3Y

2Y

1Y

13

12

10

9

5

4

2

4B

4A

3B

3A

2B

2A

1A

11

8

6

3

positive logic

Y = A (driver 1)

Y = AB or A + B (drivers 2 through 4)

schematics of inputs and outputs

EACH OUTPUT‡

GND

VCC –

74

Ω

160

Ω

72

Ω

Output

VCC +

(driver 1 only)

Internal

1.4-V Ref

to GND

VCC +

Input A

Input B

(drivers 2, 3

and 4 only)

GND

VCC –

EACH INPUT

‡ All resistor values shown are nominal.