SN74F253DR屬于集成電路（IC）的信號開關多路復用器解碼器。由美國德州儀器公司制造生產的SN74F253DR信號開關，多路復用器，解碼器邏輯型信號開關、多路復用器和編碼器 IC 可用于對以數(shù)字格式表示數(shù)據(jù)的電信號進行路由和選擇。這些器件與設計用于模擬信號的類似產品有所不同，它們保留的信息表示為兩個電狀態(tài)之一，而不是兩個外部界限內的無窮變化量。

? 3-State Versions of SN54F153 and

SN74F153

? Permits Multiplexing From N Lines to

One Line

? Performs Parallel-to-Serial Conversion

? Package Options Include Plastic

Small-Outline Packages, Ceramic Chip

Carriers, and Standard Plastic and Ceramic

300-mil DIPs

description

These data selectors/multiplexers contain

inverters and drivers to supply full binary decoding

data selection to the AND-OR gates. Separate

output-control inputs are provided for each of the

two 4-line sections.

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 a

high-impedance state), the low impedance of the

single enabled output will drive the bus line to a

high or low logic level. Each output has its own

strobe (G) inputs. The output is disabled when its

strobe is high.

The SN54F253 is characterized for operation over

the full military temperature range of ?55°C to

125°C. The SN74F253 is characterized for

operation from 0°C to 70°C.