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參數(shù)資料
| 型號： | M74HC257 |
| 廠商： | 意法半導體 |
| 英文描述： | Quad 2 Channel Multiplexer (3-STATE)(四2通道多路復用器(三態(tài))) |
| 中文描述： | 四2通道多路復用器（3態(tài)）（四2通道多路復用器（三態(tài)）） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 258K |
| 代理商： | M74HC257 |
M54/M74HC257
M54/M74HC258
October 1992
HC258QUAD2CHANNEL MULTIPLEXER(3-STATE,INVERTING)
.
HIGH SPEED
t
PD
= 10 ns(TYP.) at V
CC
= 5 V
.
LOWPOWER DISSIPATION
I
CC
= 4
μ
A(MAX.) at T
A
= 25
°
C
.
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
.
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
IOH
= I
OL
= 6 mA(MIN.)
.
BALANCEDPROPAGATION DELAYS
t
PLH
= t
PHL
.
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V to 6 V
.
PIN ANDFUNCTION COMPATIBLE
WITH 54/74LS257/258
HC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXF1R
M74HCXXXB1R
M74HCXXXM1R
M74HCXXXC1R
F1R
(CeramicPackage)
M1R
(MicroPackage)
C1R
(Chip Carrier)
PIN CONNECTIONS
(top view)
DESCRIPTION
The M54/74HC257 and the M54/74HC258 are high
speed CMOS MULTIPLEXERs fabricated with sili-
con gate C
2
MOS technology.
They have the same high speed performance of
LSTTL combined with true CMOS low power con-
sumption.
These IC’s are composed of an independent 2-
channelmultiplexer with commonSELECT and EN-
ABLE INPUT.
The M54/74HC258 is an inverting multiplexer while
the M54/74HC257 is a non-inverting multiplexer.
WhentheENABLE INPUTisheld”High”, outputs of
bothIC’sbecome high-impedance state. IfSELECT
INPUTis held”Low”, ”A” data is selected, when SE-
LECT INPUT is high ”H”, ”B” datais chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
HC257
HC258
1/12
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M74HC257B1R | 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(shù): 線路數(shù)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 |
| M74HC257B1R | 制造商:STMicroelectronics 功能描述:IC 74HC CMOS 74HC257 DIP16 6V |
| M74HC257C1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE |
| M74HC257F1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE |
| M74HC257M1R | 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(shù): 線路數(shù)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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