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CD74HCT85

更新时间： 2024-11-25 22:51:11
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
8页 50K
描述
High Speed CMOS Logic 4-Bit Magnitude Comparator

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CD74HCT85 数据手册

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CD74HC85,  
CD74HCT85  
Data sheet acquired from Harris Semiconductor  
SCHS136  
High Speed CMOS Logic  
August 1997  
4-Bit Magnitude Comparator  
Features  
Description  
• Buffered Inputs and Outputs  
The CD74HC85 and CD74HCT85 are high speed  
magnitude comparators that use silicon-gate CMOS  
technology to achieve operating speeds similar to LSTTL  
with the low power consumption of standard CMOS  
integrated circuits.  
• Typical Propagation Delay: 13ns (Data to Output at  
o
[ /Title  
(CD74  
HC85,  
CD74  
HCT85  
)
V
= 5V, C = 15pF, T = 25 C  
L A  
CC  
• Serial or Parallel Expansion Without External Gating  
These 4-bit devices compare two binary, BCD, or other  
monotonic codes and present the three possible magnitude  
results at the outputs (A > B, A < B, and A = B). The 4-bit  
input words are weighted (A0 to A3 and B0 to B3), where A3  
• Fanout (Over Temperature Range)  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads  
o
o
/Sub-  
ject  
• Wide Operating Temperature Range . . . -55 C to 125 C and B are the most significant bits.  
3
• Balanced Propagation Delay and Transition Times  
The devices are expandable without external gating, in both  
(High  
Speed  
CMOS  
Logic  
4-Bit  
Magni-  
tude  
serial and parallel fashion. The upper part of the truth table  
indicates operation using a single device or devices in a  
serially expanded application. The parallel expansion  
scheme is described by the last three entries in the truth  
table.  
• Significant Power Reduction Compared to LSTTL  
Logic ICs  
• HC Types  
- 2V to 6V Operation  
- High Noise Immunity: N = 30%, N = 30%of V at  
CC  
Ordering Information  
IL  
IH  
V
= 5V  
CC  
PKG.  
• HCT Types  
o
PART NUMBER TEMP. RANGE ( C) PACKAGE  
NO.  
E16.3  
E16.3  
Com-  
para-  
- 4.5V to 5.5V Operation  
CD74HC85E  
CD74HCT85E  
CD74HC85M  
CD74HCT85M  
NOTES:  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
16 Ld PDIP  
16 Ld PDIP  
- 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
16 Ld SOIC M16.15  
16 Ld SOIC M16.15  
1. When ordering, use the entire part number. Add the suffix 96 to  
obtain the variant in the tape and reel.  
2. 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  
CD74HC85, CD74HCT85  
(PDIP, SOIC)  
TOP VIEW  
B3  
(A < B) IN  
(A = B) IN  
(A > B) IN  
(A > B) OUT  
(A = B) OUT  
(A < B) OUT  
GND  
1
2
3
4
5
6
7
8
16 V  
CC  
15 A3  
14 B2  
13 A2  
12 A1  
11 B1  
10 A0  
9
B0  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
File Number 1770.1  
Copyright © Harris Corporation 1997  
1
12345678

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CD74HCT85 替代型号

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