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參數(shù)資料
| 型號： | 74F257A |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 中文描述： | 四2輸入多路復(fù)用器與三態(tài)輸出 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 79K |
| 代理商： | 74F257A |
Philips Semiconductors
Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31
6
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
V
M
V
M
V
M
V
M
Yn
In or S
t
PHL
t
PLH
SF00679
Waveform 1.
Propagation Delay, Data and Select to Output
V
OH
–0.3V
V
M
V
M
V
M
Yn
t
PZH
t
PHZ
SF00213
OE
0V
Waveform 2.
3-State Output Enable Time to High Level and
Output Disable Time from High Level
V
OL
+0.3V
V
M
V
M
V
M
Yn
t
PZL
t
PLZ
SF00214
OE
Waveform 3.
3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
t
w
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
NEGATIVE
PULSE
POSITIVE
PULSE
t
w
AMP (V)
0V
0V
t
THL (
t
f
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
t
THL
1MHz
500ns
2.5ns
2.5ns
Input Pulse Definition
V
CC
family
74F
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for 3-State Outputs
DEFINITIONS:
R
L
=
Load resistor;
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
OUT
of
pulse generators.
C
L
=
R
T
=
t
THL (
t
f
)
t
TLH (
t
r
)
t
TLH (
t
r
)
AMP (V)
amplitude
3.0V
1.5V
V
M
R
L
7.0V
SF00777
TEST
t
PLZ
t
PZL
All other
SWITCH
closed
closed
open
SWITCH POSITION
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|---|---|
| 74F257APC | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74F257ASJ | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74F258A | Quad 2-line to 1-line selector/multiplexer, inverting 3-State |
| 74F258A | Quad 2-Input Multiplexer with 3-STATE Outputs |
| 74F258APC | Quad 2-Input Multiplexer with 3-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F257A_WJH3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F257AD | 制造商:NXP Semiconductors 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述:74F257AD 制造商:North American Philips Discrete Products Div 功能描述:74F257AD 制造商:NXP Semiconductors 功能描述:74F257AD 制造商:NXP Semiconductors 功能描述:LOGIC MUX, QUAD, 2-INPUT, F-TTL, 16 Pin, Plastic, SOP 制造商:SIG/87'S 功能描述:74F257AD |
| 74F257ADC | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F257AN | 制造商:NXP Semiconductors 功能描述: |
| 74F257APC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產(chǎn)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(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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