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參數資料
| 型號： | KK74AC257D |
| 廠商： | KODENSHI CORP. |
| 英文描述： | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
| 中文描述： | 四2輸入數據選擇器/多路與三態輸出的高速硅柵CMOS |
| 文件頁數： | 1/6頁 |
| 文件大小： | 214K |
| 代理商： | KK74AC257D |
TECHNICAL DATA
K K
74AC257
Quad 2-Input Data Selector/Multiplexer
with 3-State Outputs
High-Speed Silicon-Gate CMOS
ORDERING INFORMATION
KK
74AC257N Plastic
KK
74AC257D SOIC
T
A
= -40
°
to 85
°
C for all packages
The
KK
74AC257 is identical in pinout to the LS/ALS257,
HC/HCT257. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
This device selects a (4-bit) nibble from either the A or B inputs as
determined by the Select input. The nibble is presented at the outputs in
noninverted from when the Output Enable pin is at a low level. A high
level on the Output Enable pin switches the outputs into the high-
impedance state.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
μ
A; 0.1
μ
A @ 25
°
C
High Noise Immunity Characteristic of CMOS Devices
Output Source/Sink 24 mA
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Output
Enable
Select
Y0-Y3
H
X
Z
L
L
A0-A3
L
H
B0-B3
X=don’t care
Z = high-impedance state
A0-A3,B0-B3=the levels of the respective
Nibble Inputs
1
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| KK74AC257N | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| KK74AC257N | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
| KK74AC258 | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
| KK74AC258D | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
| KK74AC258N | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS |
| KK74AC27 | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Triple 3-Input NOR Gate High-Speed Silicon-Gate CMOS |
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