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54LS157 数据手册 ( 数据表 ) - National ->Texas Instruments

零件编号产品描述(功能)生產廠家
54LS157 Quad 2-Line to 1-Line Data Selectors/Multiplexers National-Semiconductor
National ->Texas Instruments National-Semiconductor
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54LS157 Datasheet PDF : 54LS157 pdf   
DM74LS158J image

General Description
These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The LS157 presents true data whereas the LS158 presents inverted data to minimize propagation delay time.

Features
● Buffered inputs and outputs
● Typical Propagation Time  LS157 9 ns  LS158 7 ns
● Typical Power Dissipation  LS157 49 mW LS158 24 mW
● Alternate Military/Aerospace device (54LS157, 54LS158) is available. Contact a National Semiconductor Sales Office/Distributor for specifications.

Applications
● Expand any data input point
● Multiplex dual data buses
● Generate four functions of two variables (one variable is common)
● Source programmable counters

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54LS157 有关数据资料列表

零件编号产品描述(功能)PDF生產廠家
DM74LS157 Quad 2-Line to 1-Line Data Selectors/Multiplexers DM74LS157 View Fairchild Semiconductor
SN54F257 QUADRUPLE 2-LINE TO 1-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SN54F257 View Texas Instruments
HD74HC157 Quad. 2-to-1-line Data Selectors/Multiplexers HD74HC157 View Renesas Electronics
HD74HC157 Quad. 2-to-1-line Data Selectors/Multiplexers HD74HC157 View Hitachi -> Renesas Electronics
HD74HC258 Quad. 2-to-1-line Data Selectors/Multiplexers (with 3-state outputs) HD74HC258 View Hitachi -> Renesas Electronics
SN54ALS352 DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SN54ALS352 View Texas Instruments
HD74LS253 Dual 4-line-to-1-line Data Selectors/Multiplexers (with three-state outputs) HD74LS253 View Hitachi -> Renesas Electronics
HD74LS158 Quadruple 2-line-to-1-line Data Selectors / Multiplexers (inverted outputs) HD74LS158 View Renesas Electronics
ACT151M 8-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS ACT151M View Texas Instruments
HD74LS253 Dual 4-line-to-1-line Data Selectors / Multiplexers (with three-state outputs) HD74LS253 View Renesas Electronics

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