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参数资料
| 型号： | 74LCX257SJX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 2/9页 |
| 文件大小： | 0K |
| 描述： | MULTIPLEXER QUAD 2IN LV 16SOP |
| 标准包装： | 2,000 |
| 系列： | 74LCX |
| 类型： | 多路复用器 |
| 电路： | 4 x 2:1 |
| 独立电路： | 1 |
| 输出电流高，低： | 24mA，24mA |
| 电压电源： | 单电源 |
| 电源电压： | 2 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 16-SOP |
| 包装： | 带卷 (TR) |
www.fairchildsemi.com
2
74LCX257
Functional Description
The LCX257 is a quad 2-input multiplexer with 3-STATE
outputs. It selects four bits of data from two sources under
control of a Common Data Select input. When the Select
input is LOW, the I0x inputs are selected and when Select
is HIGH, the I1x inputs are selected. The data on the
selected inputs appears at the outputs in true (non
inverted) form. The device is 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:
Za = OE (11a S + I0a S)
Zb = OE (11b S + I0b S)
Zc = OE (11c S + I0c S)
Zd = OE (11d S + I0d S)
When the Output Enable (OE) is HIGH, the outputs are
forced to a high impedance 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 maxi-
mum ratings. Designers should ensure the Output Enable
signals to 3-STATE devices whose outputs are tied
together are designed so there is no overlap.
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Z
= High Impedance
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Output
Select
Data
Outputs
Enable
Input
Inputs
OE
SI0
I1
Z
HX
X
Z
LH
X
L
LH
X
H
LL
L
X
L
LL
H
X
H
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 74LCX257SJX_NL | 功能描述:编码器、解码器、复用器和解复用器 RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| 74LCX257T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2-Input Digital Multiplexer |
| 74LCX257TTR | 功能描述:编码器、解码器、复用器和解复用器 Quad 2-Ch Multiplexr RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| 74LCX27 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs |
| 74LCX27_05 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs |
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