SN74ALS251DR.A中文资料德州仪器数据手册PDF规格书

3-State Version of the ′ALS151

3-State Outputs Interface Directly With

System Bus

Perform Parallel-to-Serial Conversion

Complementary Outputs Provide True and

Inverted Data

Package Options Include Plastic

Small-Outline (D) Packages, Ceramic Chip

Carriers (FK), and Standard Plastic (N) and

Ceramic (J) 300-mil DIPs

description

These data selectors/multiplexers contain full

binary decoding to select one-of-eight data

sources and feature 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 (at the

high-impedance state), the low impedance of the

signal-enabled output drives the bus line to a high

or low logic level. Both outputs are controlled by

the output-enable (OE) input. The outputs are

disabled when OE is high.

The SN54ALS251 is characterized for operation

over the full military temperature range of −55°C

to 125°C. The SN74ALS251 is characterized for

operation from 0°C to 70°C.