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參數(shù)資料
| 型號： | 74F251A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-input multiplexer 3-State |
| 中文描述： | 8輸入多路復(fù)用三態(tài) |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 46K |
| 代理商： | 74F251A |
Philips Semiconductors
Product specification
74F251A
8-input multiplexer (3-State)
1
1996 Jan 05
853–0358 16191
FEATURES
High speed 8-to-1 multiplexing
On chip decoding
Multifunction capability
Inverting and Non-Inverting outputs
Both outputs are 3-State for further multiplexer expansion
DESCRIPTION
The 74F251A is a logic implementation of a single 8-position switch
with the switch position controlled by the state of three Select (S0,
S1, S2) inputs. True (Y) and complementary (Y) outputs are both
provided. The output enable (OE) is active Low. When OE is High,
both outputs are in High impedance state, allowing multiple output
connections to a common bus without driving nor loading the bus
significantly. All but one device must be in High impedance state to
avoid high currents that would exceed the maximum ratings when
the outputs of the 3-State devices are tied together. When the output
of more than one device is tied together the user must ensure that
there is no overlap in the active Low portion of the output enable
voltages.
PIN CONFIGURATION
16
15
14
13
12
11
10
7
6
5
4
3
2
1
OE
V
CC
I7
S0
S1
I6
I4
I5
I3
I2
Y
I1
I0
Y
9
8
GND
S2
SF00778
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F251A
4.5ns
19mA
ORDERING INFORMATION
DESCRIPTION
ORDER CODE
PKG
DWG #
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
16-pin plastic DIP
N74F251AN
SOT38-4
16-pin plastic SO
N74F251AD
SOT162-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
LOAD VALUE HIGH/LOW
I0–I7
Data inputs
1.0/1.0
20
μ
A/0.6mA
20
μ
A/0.6mA
20
μ
A/0.6mA
S0–S2
Select inputs
1.0/1.0
OE
Output Enable input (active Low)
1.0/1.0
Y, Y
Data outputs
150/40
3mA/24mA
NOTE:
One (1.0) FAST unit load is defined as: 20
μ
A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
1
2
3
V
= Pin 16
GND = Pin 8
SF00779
6
5
11
10
9
S0
S1
S2
7
4
12
13
14
15
OE
Y
Y
I0
I1
I2
I3
I4
I5
I6
I7
IEC/IEEE SYMBOL
SF00780
MUX
7
11
3
2
1
5
6
0
G0
7
10
2
EN
9
4
14
13
12
15
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F251A_00 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Input Multiplexer with 3-STATE Outputs |
| 74F251A_WHH3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F251AD | 制造商:Texas Instruments 功能描述: |
| 74F251ALC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 74F251APC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 8-Input 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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