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參數(shù)資料
| 型號： | DM74LS251MX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Input Digital Multiplexer |
| 中文描述： | LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16 |
| 封裝： | 0.150 INCH, MS-012, SOIC-16 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大小： | 58K |
| 代理商： | DM74LS251MX |
2000 Fairchild Semiconductor Corporation
DS006415
www.fairchildsemi.com
August 1986
Revised March 2000
D
DM74LS251
3-STATE 1-of-8 Line Data Selector/Multiplexer
General Description
These data selectors/multiplexers contain full on-chip
binary decoding to select one-of-eight data sources, and
feature a strobe-controlled 3-STATE output. The strobe
must be at a low logic level to enable these devices. The 3-
STATE outputs permit direct connection to a common bus.
When the strobe input is HIGH, both outputs are in a high-
impedance state in which both the upper and lower transis-
tors of each totem-pole output are OFF, and the output nei-
ther drives nor loads the bus significantly. When the strobe
is LOW, the outputs are activated and operate as standard
TTL totem-pole outputs.
To minimize the possibility that two outputs will attempt to
take a common bus to opposite logic levels, the output con-
trol circuitry is designed so that the average output disable
time is shorter than the average output enable time.
Features
I
3-STATE version of DM74LS151
I
Interface directly with system bus
I
Perform parallel-to-serial conversion
I
Permit multiplexing from N-lines to one line
I
Complementary outputs provide true and inverted data
I
Maximum number of common outputs: 129
I
Typical propagation delay time (D to Y): 17 ns
I
Typical power dissipation: 35 mW
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Don't Care
Z
=
High Impedance (OFF)
D0, D1…D7
=
The level of the respective D input
Order Number
DM74LS251M
DM74LS251N
Package Number
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs
Outputs
Select
B
X
L
L
H
H
L
L
H
H
Strobe
S
H
L
L
L
L
L
L
L
L
Y
W
C
X
L
L
L
L
H
H
H
H
A
X
L
H
L
H
L
H
L
H
Z
Z
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DM74LS251M | 3-STATE 1-of-8 Line Data Selector/Multiplexer |
| DM74LS251N | 3-STATE 1-of-8 Line Data Selector/Multiplexer |
| DM74LS253 | 3-STATE Data Selector/Multiplexer(三態(tài)輸出的數(shù)據(jù)選擇器/多路器) |
| DM74LS253M | Octal D-Type Latch with 3-STATE Outputs; Package: SSOP; No of Pins: 20; Container: Rail |
| DM74LS253N | Octal D-Type Latch with 3-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM74LS251N | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Data Sel/Mul 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| DM74LS253 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| DM74LS253M | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 3-STATE Dt Sl/Mul 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| DM74LS253MX | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 3-STATE Dt Sl/Mul 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| DM74LS253N | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 3-STATE Dt Sl/Mul 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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