CD54HC85_08 Datasheet, PDF (1/18 Pages) Texas Instruments – High-Speed CMOS Logic 4-Bit Magnitude Comparator

Data sheet acquired from Harris Semiconductor
SCHS136E
August 1997 - Revised October 2003
CD54HC85, CD74HC85,
CD54HCT85, CD74HCT85
High-Speed CMOS Logic
4-Bit Magnitude Comparator
[ /Title
(CD74
HC85,
CD74
HCT85
)
/Sub-
ject
(High
Speed
CMOS
Logic
4-Bit
Magni-
tude
Com-
para-
Features
Description
• Buffered Inputs and Outputs
• Typical Propagation Delay: 13ns (Data to Output at
V_CC = 5V, C_L = 15pF, T_A = 25^oC
• Serial or Parallel Expansion Without External Gating
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55^oC to 125^oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30%of V_CC at
V_CC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V_IL= 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l ≤ 1µA at V_OL, V_OH
Pinout
CD54HC85, CD54HCT85 (CERDIP)
CD74HC85 (PDIP, SOIC, SOP, TSSOP)
CD74HCT85 (PDIP, SOIC)
TOP VIEW
B3 1
(A < B) IN 2
(A = B) IN 3
(A > B) IN 4
(A > B) OUT 5
(A = B) OUT 6
(A < B) OUT 7
GND 8
16 V_CC
15 A3
14 B2
13 A2
12 A1
11 B1
10 A0
9 B0
The ’HC85 and ’HCT85 are high speed magnitude
comparators that use silicon-gate CMOS technology to
achieve operating speeds similar to LSTTL with the low
power consumption of standard CMOS integrated circuits.
These 4-bit devices compare 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.
The devices are expandable without external gating, in both
serial and parallel fashion. The upper part of the truth table
indicates operation using a single device or devices in a
serially expanded application. The parallel expansion
scheme is described by the last three entries in the truth
table.
Ordering Information
PART NUMBER
CD54HC85F3A
CD54HCT85F3A
CD74HC85E
CD74HC85M
CD74HC85MT
CD74HC85M96
CD74HC85NSR
CD74HC85PW
CD74HC85PWR
CD74HC85PWT
CD74HCT85E
CD74HCT85M
CD74HCT85MT
CD74HCT85M96
TEMP. RANGE
(^oC)
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
PACKAGE
16 Ld CERDIP
16 Ld CERDIP
16 Ld PDIP
16 Ld SOIC
16 Ld SOIC
16 Ld SOIC
16 Ld SOP
16 Ld TSSOP
16 Ld TSSOP
16 Ld TSSOP
16 Ld PDIP
16 Ld SOIC
16 Ld SOIC
16 Ld SOIC
NOTE: When ordering, use the entire part number. The suffixes 96
and R denote tape and reel. The suffix T denotes a small-quantity
reel of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
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