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參數資料
| 型號： | 74AC257B |
| 廠商： | 意法半導體 |
| 英文描述： | QUAD 2 CHANNEL MULTIPLEXER 3-STATE |
| 中文描述： | 四2通道多路復用三態 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 89K |
| 代理商： | 74AC257B |
74AC257
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
April 1997
I
HIGHSPEED: t
PD
=4.5ns (TYP.) at V
CC
=5V
I
LOWPOWER DISSIPATION:
I
CC
=8
μ
A (MAX.) at T
A
=25
o
C
I
HIGHNOISEIMMUNITY:
V
NIH
= V
NIL
=28%V
CC
(MIN.)
I
50
TRANSMISSIONLINEDRIVING
CAPABILITY
I
SYMMETRICALOUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN)
I
BALANCEDPROPAGATIONDELAYS:
t
PLH
t
PHL
I
OPERATINGVOLTAGERANGE:
V
CC
(OPR)= 2V to 6V
I
PIN AND FUNCTION COMPATIBLEWITH
74 SERIES257
I
IMPROVEDLATCH-UP IMMUNITY
DESCRIPTION
The AC257 is an advanced high-speed CMOS
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
fabricated with sub-micron silicon gate and
double-layermetal wiring C
2
MOS technology.
It is ideal for low power applications mantaining
high speed operationsimilar to equivalentBipolar
SchottkyTTL.
These IC’s are composed of an independent 2
channel multiplexer with common SELECT and
ENABLEINPUT.
The AC257 is a noninverting multiplexer.
When the ENABLE INPUT is held ”High”, outputs
of both IC’s become high impedance state. If
SELECT INPUT is held ”Low”, ”A” data is
selected, when SELECT INPUT is ”High”, ”B”
datais chosen.
All
inputs and
outputs
protectioncircuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
are
equipped with
PINCONNECTION AND IEC LOGICSYMBOLS
ORDER CODES :
74AC257B
M
(Micro Package)
B
(Plastic Package)
1/10
相關PDF資料 |
PDF描述 |
|---|---|
| 74AC257 | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74AC257MTC | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74AC257PC | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74AC257SC | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74AC257SJ | Quad 2-Input Multiplexer with 3-STATE Outputs |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 74AC257DC | 制造商:National Semiconductor Corporation 功能描述:LOGIC MUX, QUAD, 2-INPUT, AC-CMOS, 16 Pin, Ceramic, DIP |
| 74AC257DSC | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 74AC257M | 功能描述:編碼器、解碼器、復用器和解復用器 Quad 2-Ch Multiplexr RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74AC257MTC | 功能描述:編碼器、解碼器、復用器和解復用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74AC257MTC_Q | 功能描述:編碼器、解碼器、復用器和解復用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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