SN74HC251N Datasheet PDF - TI

The SN74HC251N is a Data Selector/Multiplexer with 3-state outputs. It contains full binary decoding to select 1-of-8 data sources and feature strobe-controlled complementary 3-state outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (in the high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Both outputs are controlled by the OE\ input. The outputs are disabled when OE\ is high.

● 3-state Version of HC151

● High-current 3-state outputs interface directly with system bus or can drive up to 15 LSTTL loads

● 80µA Maximum low power consumption

● 9ns Propagation delay (typical)

● ±6mA Output drive at 5V

● 1µA Maximum low input current

● Perform parallel-to-serial conversion

● Complementary outputs provide true and inverted data