CD54HC688_08 Datasheet, PDF (1/15 Pages) Texas Instruments – High-Speed CMOS Logic 8-Bit Magnitude Comparator

Data sheet acquired from Harris Semiconductor
SCHS196C
September 1997 - Revised August 2003
CD54HC688, CD74HC688,
CD54HCT688, CD74HCT688
High-Speed CMOS Logic
8-Bit Magnitude Comparator
[ /Title
(CD74
HC688
,
CD74
HCT68
8)
/Sub-
ject
(High
Speed
CMOS
Features
Description
• Cascadable
• 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
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.
Ordering Information
PART NUMBER
CD54HC688F3A
CD54HCT688F3A
CD74HC688E
CD74HC688M
CD74HC688M96
CD74HC688NSR
CD74HC688PWR
CD74HC688PWT
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
PACKAGE
20 Ld CERDIP
20 Ld CERDIP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld SOP
20 Ld TSSOP
20 Ld TSSOP
CD74HCT688E
-55 to 125
20 Ld PDIP
CD74HCT688M
-55 to 125
20 Ld SOIC
CD74HCT688M96
-55 to 125
20 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.
Pinout
CD54HC688, CD54HCT688 (CERDIP)
CD74HC688 (PDIP, SOIC, SOP, TSSOP)
CD74HCT688 (PDIP, SOIC)
TOP VIEW
E1
A0 2
B0 3
A1 4
B1 5
A2 6
B2 7
A3 8
B3 9
GND 10
20 V_CC
19 Y
18 B7
17 A7
16 B6
15 A6
14 B5
13 A5
12 B4
11 A4
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
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