SN75C188

QUADRUPLE LOW-POWER LINE DRIVERS

SLLS033F – JANUARY 1988 – REVISED MARCH 1997

9

POST OFFICE BOX 655303

APPLICATION INFORMATION

SN75C188

SN75C188

Output

+15 V

VCC +

VCC –

VCC –

VCC +

NOTE A: External diodes placed in series with the VCC + and VCC – leads protect the SN75C188 in the fault condition where the device outputs

are shorted to

±15 V and the power supplies are at low voltage and provide low-impedance paths to GND.

Figure 13. Power Supply Protection to Meet Power-Off Fault Conditions of Standard EIA/TIA-232-E