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參數(shù)資料
| 型號： | SN74LS258BD |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | LOW POWER SCHOTTKY |
| 中文描述： | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 118K |
| 代理商： | SN74LS258BD |
SN74LS257B SN74LS258B
http://onsemi.com
4
FUNCTIONAL DESCRIPTION
The LS257B and LS258B are Quad 2-Input Multiplexers
with 3-state outputs. They select four bits of data from two
sources each under control of a Common Data Select Input.
When the Select Input is LOW, the I
0
inputs are selected and
when Select is HIGH, the I
1
inputs are selected. The data on
the selected inputs appears at the outputs in true
(non-inverted) form for the LS257B and in the inverted form
for the LS258B.
The LS257B and LS258B are the logic implementation of
a 4-pole, 2-position switch where the position of the switch
is determined by the logic levels supplied to the Select Input.
The logic equations for the outputs are shown below:
When the Output Enable Input (E
0
) is HIGH, the outputs
are forced to a high impedance “off” state. If the outputs are
tied together, all but one device must be in the high
impedance state to avoid high currents that would exceed the
maximum ratings. Designers should ensure that Output
Enable signals to 3-state devices whose outputs are tied
together are designed so there is no overlap.
LS257B
Z
a
= E
0
(I
1a
S + I
0a
S) Z
b
= E
0
(I
1b
S + I
0b
S)
Z
c
= E
0
(I
1c
S + I
0c
S) Z
d
= E
0
(I
1d
S + I
0d
S)
LS258B
Z
a
= E
0
(I
1a
S + I
0a
S) Z
b
= E
0
(I
1b
S + I
0b
S)
Z
c
= E
0
(I
1c
S + I
0c
S) Z
d
= E
0
(I
1d
S + I
0d
S)
TRUTH TABLE
OUTPUT
ENABLE
SELECT
INPUT
DATA
INPUTS
OUTPUTS
LS257B
OUTPUTS
LS258B
E
O
S
I
0
I
1
Z
Z
H
L
L
L
L
X
H
H
L
L
X
X
X
L
H
X
L
H
X
X
(Z)
L
H
L
H
(Z)
H
L
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
(Z) = High Impedance (off)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN74LS258BN | 3V PA/Driver, +22dBm PSAT, 0.5-6GHz, SOT363(SC-70) |
| SN74LS259 | LOW POWER SCHOTTKY |
| SN74LS259D | LOW POWER SCHOTTKY |
| SN74LS259N | LOW POWER SCHOTTKY |
| SN74LS260D | DUAL 5-INPUT NOR GATE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS258BDE4 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Quad 2-to-1 Data Slct/Mltpx W/3St Otp 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 |
| SN74LS258BDG4 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dual 4Ln To 1Ln Data Selector 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 |
| SN74LS258BDR | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Quad 2-to-1 Data Slct/Mltpx W/3St Otp 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 |
| SN74LS258BDR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS258BDRE4 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Quad 2-to-1 Data Slct/Mltpx W/3St Otp 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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