Product Summary

The CD74HCT85E is a High Speed CMOS Logic 4-Bit Magnitude Comparator. The CD74HCT85E uses silicon-gate CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of standard CMOS integrated circuits. The CD74HCT85E compares 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 and B3 are the most significant bits.

Parametrics

CD74HCT85E absolute maximum ratings: (1)DC Supply Voltage, VCC: -0.5V to 7V; (2)DC Input Diode Current, IIK For VI＜-0.5V or VI＞VCC + 0.5V :±20mA; (3)DC Output Diode Current, IOK For VO＜-0.5V or VO＞VCC + 0.5V:±20mA; (4)DC Output Source or Sink Current per Output Pin, IO For VO＞-0.5V or VO＜VCC + 0.5V: ±25mA; (5)DC VCC or Ground Current, ICC or IGND : ±50mA.

Features

CD74HCT85E features: (1)Buffered Inputs and Outputs; (2)Typical Propagation Delay: 13ns (Data to Output at VCC = 5V, CL = 15pF, TA = 25℃; (3)Serial or Parallel Expansion Without External Gating; (4)Fanout (Over Temperature Range): Standard Outputs: 10 LSTTL Loads; (5)Bus Driver Outputs: 15 LSTTL Loads; (6)Wide Operating Temperature Range: -55℃ to 125℃; (7)Balanced Propagation Delay and Transition Times; (8)Significant Power Reduction Compared to LSTTL Logic ICs; (9)HC Types: 2V to 6V Operation; (10)High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V; (11)HCT Types: 4.5V to 5.5V Operation; (12)Direct LSTTL Input Logic Compatibility,; (13)VIL= 0.8V (Max), VIH = 2V (Min): CMOS Input Compatibility, Il≤1mA at VOL, VOH.

Diagrams

CD74HCT85E block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
CD74HCT85E
CD74HCT85E
Texas Instruments
Comparator ICs High Speed CMOS 4-Bit Magnitude
Data Sheet
0-1: $0.75
1-25: $0.60
25-100: $0.53
100-250: $0.46
CD74HCT85EE4
CD74HCT85EE4
Texas Instruments
Comparator ICs High Speed CMOS 4-Bit Magnitude
Data Sheet
0-1: $0.68
1-25: $0.55
25-100: $0.50
100-250: $0.44