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74HC85 High-Speed Si-Gate CMOS 4-Bit Magnitude Comparators
High-speed CMOS 4-bit magnitude comparators with expandable length and JEDEC compliance.
- Spec name: 74HC85
- Pin Compatibility: Low Power Schottky TTL (LSTTL)
- Compliance: JEDEC Standard No. 7A
- Output: QA>B, QA=B, QAB, IA=B, IAB
- Expansion: Serial or parallel without extra gating
- Comparison: Magnitude of any binary words
- Output Capability: Standard
- ICC Category: MSI
Top Features:
- Expandable length for any binary words
- Serial or parallel expansion without extra gating
- Standard output capability
- MSI ICC category
The 74HC85 are 4-bit magnitude comparators that can be expanded to almost any length. They perform a comparison of two 4-bit binary, BCD, or other monotonic codes and present the three possible magnitude results at the outputs (QA>B, QA=B, and QAB, IA=B, and IAB = LOW and IA=B = HIGH). For words greater than 4-bits, units can be cascaded by connecting outputs QA? and QA=B to the corresponding inputs of the significant comparator.
Specifications:
- Propagation Delay to QAB: 15 ns
- IA=B to QA=B: 11 ns
- An, Bn to QA>B, QAB: 20 ns
- An, Bn to QA=B: 18 ns
- IAB to QAB: 15 ns
- A=B to QA=B: 11 ns
- CI Input Capacitance: 3.5 pF
- CPD Power Dissipation Capacitance per package: 18 pF
Related Document: 74HC85 IC Datasheet
* Images are for illustration only; actual product may vary.