CD74HCT688ME4

高速CMOS逻辑8位幅度比较 High-Speed CMOS Logic 8-Bit Magnitude Comparator

Description

The ’HC688 and ’HCT688 are 8-bit magnitude comparators designed for use in computer and logic applications that require the comparison of two 8-bit binary words. When the compared words are equal the output Y is low and can be used as the enabling input for the next device in a cascaded application.

Features

• Cascadable

• Fanout Over Temperature Range

 - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

 - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL Logic ICs

• HC Types

 - 2V to 6V Operation

 - High Noise Immunity: NIL= 30%, NIH= 30%of VCCat VCC= 5V

• HCT Types

\- 4.5V to 5.5V Operation

\- Direct LSTTL Input Logic Compatibility, VIL= 0.8V Max, VIH= 2V Min

\- CMOS Input Compatibility, Il ≤1µA at VOL, VOH