INPUT / OUTPUT DESCRIPTION:
A/B/ C/D
These are CMOS / TTL data inputs that can also operate with input levels up to the V
DD
power supply. All data input blocks contain hysteresis.
AO / BO / CO / DO / AO / BO / CO / DO
These outputs are open-drain.
ENA
A logic low on this CMOS / TTL compatible input enables the output drivers while logic high forces them into a high-impedance state. This input is
also used to enable / disable the output short circuit thermal protection.
Applying a voltage between 7.5V and 12.5V to the ENA input will disable the thermal shutdown protection function. When using this feature, the Line
Driver Outputs are enabled but no longer protected.
7273N-013113-2
LSI [ LSI COMPUTER SYSTEMS ]
