CD74HC688 Datasheet, PDF (1/7 Pages) Texas Instruments – High Speed CMOS Logic 8-Bit Magnitude Comparator

Data sheet acquired from Harris Semiconductor
SCHS196
September 1997
CD74HC688,
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
The Harris CD74HC688 and CD74HCT688 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
• 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
PART NUMBER TEMP. RANGE (^oC) PACKAGE
PKG.
NO.
CD74HC688E
-55 to 125
20 Ld PDIP E20.3
CD74HCT688E
-55 to 125
20 Ld PDIP E20.3
CD74HC688M
-55 to 125
20 Ld SOIC M20.3
CD74HCT688M
-55 to 125
20 Ld SOIC M20.3
CD54HC688
-55 to 125
Wafer
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Die for this part number is available which meets all electrical
specifications. Please contact your local sales office or Harris
customer service for ordering information.
Pinout
CD74HC688, 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 © Harris Corporation 1997
1
File Number 1646.1