Untitled-design-2020-12-30T141831.951.png

74HC85N DIP IC

The 74HC85 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC85 are 4-bit magnitude comparators that can be expanded to almost any length. They perform 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.

Features:-?

??Serial or parallel expansion without extra gating

??Magnitude comparison of any binary words

??Output capability: standard

??ICC category: MSI

Specifications:-

Symbol	Parameter	Conditions	Typical		Unit
Symbol	Parameter	Conditions	?HC	HCT	Unit
tPHL/ tPLH	Propagation Delay ?to QAB 15 15 ns IA=B to QA=B 11 15 ns	CL = 15 pF; VCC = 5 V			ns
	An, Bn to QA>B , QAB		20	22	ns
	An, Bn to QA=B		18	20	ns
	IA<B,, IA=B, IA>B to QA<B, QA>B		15	15	ns
	A=B to QA=B		11	15	ns
CI	Input Capacitance		3.5	3.5	Pf
CPD	Power Dissipation Capacitance per package	notes 1 and 2	18	20	Pf