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CD74HC251M

更新时间： 2024-09-26 23:00:39
品牌 Logo 应用领域
德州仪器 - TI 复用器逻辑集成电路光电二极管
页数 文件大小 规格书
7页 40K
描述
High Speed CMOS Logic 8-Input Multiplexer; Three-State

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CD74HC251M 数据手册

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CD74HC251,  
CD74HCT251  
Data sheet acquired from Harris Semiconductor  
SCHS169  
High Speed CMOS Logic  
November 1997  
8-Input Multiplexer; Three-State  
Features  
Description  
• Selects One of Eight Binary Data Inputs  
• Three-State Output Capability  
• True and Complement Outputs  
The Harris CD74HC251 and CD74HCT251 are 8-channel  
digital multiplexers with three-state outputs, fabricated with  
high-speed silicon-gate CMOS technology. Together with the  
low power consumption of standard CMOS integrated cir-  
cuits, they possess the ability to drive 10 LSTTL loads. The  
three-state feature makes them ideally suited for interfacing  
with bus lines in a bus-oriented system.  
[ /Title  
(CD74  
HC251  
,
• Typical (Data to Output) Propagation Delay of 14ns at  
o
V
= 5V, C = 15pF, T = 25 C  
L A  
CC  
CD74  
HCT25  
1)  
/Sub-  
ject  
(High  
Speed  
CMOS  
Logic  
8-Input  
Multi-  
plexer;  
Three-  
• Fanout (Over Temperature Range)  
This multiplexer features both true (Y) and complement (Y)  
outputs as well as an output enable (OE) input. The OE must  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads be at a low logic level to enable this device. When the OE  
input is high, both outputs are in the high-impedance state.  
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C  
• Balanced Propagation Delay and Transition Times  
When enabled, address information on the data select inputs  
determines which data input is routed to the Y and Y out-  
puts. The CD74HCT251 logic family is speed, function, and  
pin-compatible with the standard 74LS251.  
• Significant Power Reduction Compared to LSTTL  
Logic ICs  
Ordering Information  
• Alternate Source is Philips  
- HC Types  
PKG.  
- 2V to 6V Operation  
o
PART NUMBER TEMP. RANGE ( C) PACKAGE  
NO.  
E16.3  
E16.3  
- High Noise Immunity: N = 30%, N = 30% of V  
IL IH CC  
CD74HC251E  
CD74HCT251E  
CD74HC251M  
CD74HCT251M  
NOTES:  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
16 Ld PDIP  
16 Ld PDIP  
at V  
= 5V  
CC  
• HCT Types  
- 4.5V to 5.5V Operation  
16 Ld SOIC M16.15  
16 Ld SOIC M16.15  
- Direct LSTTL Input Logic Compatibility,  
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 elec-  
trical specifications. Please contact your local sales office or  
Harris customer service for ordering information.  
Pinout  
CD74HC251, CD74HCT251  
(PDIP, SOIC)  
TOP VIEW  
I
I
I
I
1
2
3
4
5
6
7
8
16 V  
CC  
3
2
1
0
15 I  
14 I  
13 I  
12 I  
4
5
6
7
Y
Y
11 S0  
10 S1  
OE  
9
S2  
GND  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
File Number 1489.1  
Copyright © Harris Corporation 1997  
1
1234567

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CD74HC251M 替代型号

型号 品牌 替代类型 描述 数据表
CD54HC251F TI

完全替代

 High-Speed CMOS Logic 8-Input Multiplexer, Three-State
CD54HC251F3A TI

完全替代

 High-Speed CMOS Logic 8-Input Multiplexer, Three-State

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CD74HC251M96 TI

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 		High-Speed CMOS Logic 8-Input Multiplexer, Three-State
CD74HC251M96 RENESAS

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 		MULTIPLEXER
CD74HC251M96E4 ROCHESTER

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 		Multiplexer, HC/UH Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, CMOS
CD74HC251ME4 ROCHESTER

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 		Multiplexer, HC/UH Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, CMOS
CD74HC251ME4 TI

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 		HC/UH SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16, GREEN, PLASTIC,
CD74HC251MG4 TI

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 		High Speed CMOS Logic 8-Input Multiplexer with 3-State Outputs 16-SOIC -55 to 125
CD74HC251MT TI

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 		High-Speed CMOS Logic 8-Input Multiplexer, Three-State
CD74HC251MTE4 ROCHESTER

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 		Multiplexer, HC/UH Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, CMOS
CD74HC253 TI

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 		High Speed CMOS Logic Dual 4-Input Multiplexer
CD74HC253E TI

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 		High-Speed CMOS Logic Dual 4-Input Multiplexer

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