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CD74HC257

更新时间： 2024-01-24 14:58:15
品牌 Logo 应用领域
德州仪器 - TI 复用器
页数 文件大小 规格书
7页 54K
描述
High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

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中文翻译

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CD74HC257 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：SOP, SOP16,.25Reach Compliance Code：unknown
风险等级：5.84JESD-30 代码：R-PDSO-G16
JESD-609代码：e0负载电容（CL）：50 pF
逻辑集成电路类型：MULTIPLEXER最大I（ol）：0.006 A
功能数量：4输入次数：2
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C输出特性：3-STATE
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE电源：2/6 V
Prop。Delay @ Nom-Sup：38 ns认证状态：Not Qualified
子类别：Multiplexer/Demultiplexers表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
Base Number Matches：1

CD74HC257 数据手册

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CD74HC257,  
CD74HCT257  
Data sheet acquired from Harris Semiconductor  
SCHS171  
High Speed CMOS Logic Quad 2-Input  
November 1997  
Multiplexer with Three-State Non-Inverting Outputs  
Features  
Description  
• Buffered Inputs  
The Harris CD74HC257 and CD74HCT257 are quad 2-input  
multiplexers which select four bits of data from two sources  
under the control of a common Select Input (S). The Output  
Enable input (OE) is active LOW. When OE is HIGH, all of  
the outputs (1Y-4Y) are in the high impedance state regard-  
less of all other input conditions.  
• Typical Propagation Delay ( In to Output ) = 12ns at  
[ /Title  
(CD74  
HC257  
,
CD74  
HCT25  
7)  
o
V
= 5V, C = 15pF, T = 25 C  
CC  
L A  
• Fanout (Over Temperature Range)  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads  
Moving data from two groups of registers to four common  
output busses is a common use of the 257. The state of the  
Select input determines the particular register from which  
the data comes. It can also be used as a function generator.  
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C  
• Balanced Propagation Delay and Transition Times  
/Sub-  
ject  
• Significant Power Reduction Compared to LSTTL  
Logic ICs  
Ordering Information  
• HC Types  
- 2V to 6V Operation  
(High  
Speed  
CMOS  
Logic  
Quad  
2-Input  
Multi-  
plexer  
TEMP. RANGE  
PKG.  
NO.  
o
PART NUMBER  
CD74HC257E  
CD74HCT257E  
CD74HC257M  
CD74HCT257M  
NOTES:  
( C)  
PACKAGE  
16 Ld PDIP  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
- High Noise Immunity: N = 30%, N = 30% of V  
IL IH CC  
at V  
= 5V  
CC  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
E16.3  
• HCT Types  
- 4.5V to 5.5V Operation  
- Direct LSTTL Input Logic Compatibility,  
E16.3  
M16.15  
M16.15  
V = 0.8V (Max), V = 2V (Min)  
IL IH  
- CMOS Input Compatibility, I ≤ 1µA at V , V  
OL OH  
l
1. When ordering, use the entire part number. Add the suffix 96 to  
obtain the variant in the tape and reel.  
2. Wafer or die for this part number is available which meets all  
electrical specifications. Please contact your local sales office or  
Harris customer service for ordering information.  
Pinout  
CD74HC257, CD74HC257  
(PDIP, SOIC)  
TOP VIEW  
S
1
2
3
4
5
6
7
8
16 V  
CC  
1I  
15 OE  
0
1
1I  
14 4I  
13 4I  
0
1
1Y  
2I  
2I  
12 4Y  
0
1
11 3I  
10 3I  
0
1
2Y  
9
3Y  
GND  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
File Number 1650.1  
Copyright © Harris Corporation 1997  
1
1234567

中文翻译

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CD74HC257 替代型号

型号 品牌 替代类型 描述 数据表
CD54HC257 TI

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 High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

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