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CD74HC280

更新时间： 2024-11-19 23:00:39
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
5页 39K
描述
High Speed CMOS Logic 9-Bit Odd/Even Parity Generator/Checker

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CD74HC280 数据手册

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CD74HC280,  
CD74HCT280  
Data sheet acquired from Harris Semiconductor  
SCHS175  
High Speed CMOS Logic  
November 1997  
9-Bit Odd/Even Parity Generator/Checker  
at V  
= 5V  
Features  
CC  
• HCT Types  
- 4.5V to 5.5V Operation  
- Direct LSTTL Input Logic Compatibility,  
V = 0.8V (Max), V = 2V (Min)  
IL IH  
• Typical Propagation Delay = 17ns at V  
o
= 5V,  
CC  
C = 15pF, T = 25 C  
L
A
[ /Title  
(CD74  
HC280  
,
CD74  
HCT28  
0)  
• Replaces 74LS180 Types  
• Easily Cascadable  
- CMOS Input Compatibility, I ≤ 1µA at V , V  
l
OL OH  
• Fanout (Over Temperature Range)  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads  
Description  
The Harris CD74HC280 and CD74HCT280 are 9-bit  
odd/even parity, generator checker devices. Both even and  
odd parity outputs are available for checking or generating  
parity for words up to nine bits long. Even parity is indicated  
(ΣE output is high) when an even number of data inputs is  
high. Odd parity is indicated (ΣO output is high) when an odd  
number of data inputs is high. Parity checking for words larger  
than 9 bits can be accomplished by tying the ΣE output to any  
input of an additional HC/HCT280 parity checker.  
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  
(High  
Speed  
CMOS  
Logic  
9-Bit  
Odd/E  
ven  
• HC Types  
- 2V to 6V Operation  
- High Noise Immunity: N = 30%, N = 30% of V  
IL IH CC  
Ordering Information  
Functional Diagram  
Pinout  
CD74HC280, CD74HCT280  
(PDIP)  
Parity  
8
I0  
TOP VIEW  
9
I1  
I6  
I7  
1
2
3
4
5
6
7
14 V  
CC  
10  
I2  
I3  
5
6
13 I5  
12 I4  
11 I3  
10 I2  
∑ EVEN  
∑ ODD  
11  
12  
13  
1
NC  
I8  
I4  
I5  
I6  
ΣE  
ΣO  
GND  
9
8
I1  
I0  
2
4
I7  
I8  
GND = 7  
= 14  
V
CC  
NC = 3  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
File Number 1669.1  
Copyright © Harris Corporation 1997  
1
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CD74HC280 替代型号

型号 品牌 替代类型 描述 数据表
CD54HC280 TI

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 High-Speed CMOS Logic 9-Bit Odd/Even Parity Generator/Checker

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