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
