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參數資料
| 型號： | 74VHC257M |
| 廠商： | 意法半導體 |
| 英文描述： | Quadruple 2-Input Positive-AND Gates 14-SOIC -40 to 85 |
| 中文描述： | 四2通道多路復用三態 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 70K |
| 代理商： | 74VHC257M |
74VHC257
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
June 1999
I
HIGHSPEED:t
PD
=3.7ns(TYP.)at V
CC
=5V
I
LOWPOWER DISSIPATION:
I
CC
= 4
μ
A (MAX.)at T
A
=25
o
C
I
HIGHNOISEIMMUNITY:
V
NIH
=V
NIL
=28%V
CC
(MIN.)
I
POWERDOWNPROTECTIONON INPUTS
I
SYMMETRICALOUTPUTIMPEDANCE:
|I
OH
|= I
OL
=8 mA(MIN)
I
BALANCEDPROPAGATIONDELAYS:
t
PLH
t
PHL
I
OPERATINGVOLTAGERANGE:
V
CC
(OPR)= 2V to 5.5V
I
PINAND FUNCTIONCOMPATIBLEWITH
74 SERIES257
I
IMPROVEDLATCH-UP IMMUNITY
I
LOWNOISEV
OLP
=0.8V(Max.)
DESCRIPTION
The 74VHC257 is an advanced high-speed
CMOS QUAD
2
CHANNEL
(3-STATE) fabricated with sub-micron silicon gate
and
double-layer
metal
technology.
It is composed of four independent 2 channel
multiplexers with common SELECT and ENABLE
INPUT.
MULTIPLEXER
wiring
C
2
MOS
The 74VHC257is a non inverting multiplexer.
When the ENABLE INPUT is held ”High”, all
outputs
become
high
SELECT INPUT is held ”Low”, ”A” data is
selected, when SELECT INPUT is ”High”, ”B”
datais chosen.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface5V to 3V.
All
inputs
and
outputs are
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
impedance
state.
If
equipped with
PIN CONNECTION AND IEC LOGIC SYMBOLS
M
(Micro Package)
T
(TSSOPPackage)
ORDER CODES :
74VHC257M
74VHC257T
1/9
相關PDF資料 |
PDF描述 |
|---|---|
| 74VHC257T | Quadruple 2-Input Positive-AND Gates 14-SOIC -40 to 85 |
| 74VHC273 | Quadruple 2-Input Positive-AND Gates 14-SOIC -40 to 85 |
| 74VHC273M | Quadruple 2-Input Positive-AND Gates 14-PDIP -40 to 85 |
| 74VHC273T | OCTAL D-TYPE FLIP FLOP WITH CLEAR |
| 74VHC273SJ | Octal D-Type Flip-Flop |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 74VHC257MTC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
| 74VHC257MTR | 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 |
| 74VHC257N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
| 74VHC257SJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
| 74VHC257T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD 2 CHANNEL MULTIPLEXER 3-STATE |
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