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參數(shù)資料
| 型號： | HD74HC257 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Octal Buffers And Line Drivers With 3-State Outputs 20-CDIP -55 to 125 |
| 中文描述： | 四。 2比1線數(shù)據(jù)選擇器/多路轉(zhuǎn)換器（帶noninverted三態(tài)輸出） |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 52K |
| 代理商： | HD74HC257 |
HD74HC257
Quad. 2-to-1-line Data Selectors/Multiplexers
(with noninverted 3-state outputs)
Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with
bus lines in a bus organized system. When the output control input line is taken high, the outputs of all four
multiplexers are sent into a high impedance state. When the output control line is low, the select input
chooses whether the A or B input is used.
Features
High Speed Operation: t
pd
(Data to Y) = 10.5 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 μA max
Low Quiescent Supply Current: I
CC
(static) = 4 μA max (Ta = 25°C)
Function Table
Inputs
Outputs
Output Control
Select
A
B
Y
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
H
Notes H: high level, L: low level, X: irrelevant
X
X
X
High impedance
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD74HC258 | Octal Buffers And Line Drivers With 3-State Outputs 20-CFP -55 to 125 |
| HD74HC259 | Octal Bus Transceivers With 3-State Outputs 20-LCCC -55 to 125 |
| HD74HC273 | Octal Bus Transceivers With 3-State Outputs 20-CFP -55 to 125 |
| HD74HC279 | Octal Bus Transceivers With 3-State Outputs 20-CDIP -55 to 125 |
| HD74HC27 | Octal Bus Transceivers With 3-State Outputs 20-CDIP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD74HC258FP | 制造商:Renesas Electronics Corporation 功能描述:Multiplexer 1-Element CMOS 3-ST 8-IN 16-Pin SOP |
| HD74HC273FP-E | 制造商:Renesas Electronics Corporation 功能描述:Logic, 74HC series, SOP-20 |
| HD74HC273FPVEL-E | 制造商:Renesas Electronics Corporation 功能描述:Logic, 74HC series, SOP-20 |
| HD74HC279FP(E) | 制造商:Renesas Electronics Corporation 功能描述: |
| HD74HC27FP | 制造商:Renesas Electronics Corporation 功能描述:NOR Gate 3-Element 3-IN CMOS 14-Pin SOP |
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