Texas Instruments SN54ALS688, SN74ALS688 8-Bit Identity Comparators Data Sheet Manual
Summary
The SN54ALS688 and SN74ALS688 are highly reliable 8-bit identity comparators designed to compare two 8-bit binary or BCD words and determine if they are equal ($P=Q$). This detailed manual serves as a comprehensive resource for hardware designers, providing essential operational parameters including logic symbols, absolute maximum ratings, recommended electrical characteristics, and advanced switching timing details. It encompasses varying temperature grades—from military to commercial—ensuring precise implementation of comparison logic in demanding electronic systems.
Page 1 Text Content
查询5962-88578012A供应商 SN54ALS688, SN74ALS688
8-BIT IDENTITY COMPARATORS SDAS228A – JUNE 1982 – REVISED JANUARY 1995 Compare Two 8-Bit Words SN54ALS688 J PACKAGE SN74ALS688 DW OR N PACKAGE
Totem-Pole Outputs (P = Q)
(TOP VIEW)
′ALS688 Are Identical to ′ALS521
Package Options Include Plastic VCC
Small-Outline (DW) Packages, Ceramic P0 P = Q Chip Carriers (FK), and Standard Plastic (N) Q0 Q7 and Ceramic (J) 300-mil DIPs P1 P7 Q1 Q6 description P2 P6 Q2 Q5
These identity comparators perform comparisons
on two 8-bit binary or BCD words and provide
P = Q outputs. These devices have totem-pole
GND P4
outputs. The SN54ALS688 is characterized for operation
SN54ALS688 FK PACKAGE
over the full military temperature range of –55°C (TOP VIEW) to 125°C. The SN74ALS688 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS P1 Q7
OUTPUT
DATA ENABLE
PRODUCTION DATA information is current as of publication date. Copyright 1995, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page Summary Contents For Texas Instruments SN54ALS688, SN74ALS688 8-Bit Identity Comparators Data Sheet Manual
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 14 |
| File Size | 466.63 KB |
| Published | June 22, 2026 |
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Frequently Asked Questions
What is the difference between the SN54ALS688 and SN74ALS688 models?
The SN54ALS688 operates over a full military temperature range of –55°C to 125°C, while the SN74ALS688 operates from 0°C to 70°C.
What is the recommended operating voltage ($ ext{V}_{CC}$) for this device?
The recommended operational supply voltage range ($ ext{V}_{CC}$) is between 4.5 V and 5.5 V.
How many words does the identity comparator compare?
It performs comparisons on two 8-bit binary or BCD words.
What package options are available for this device?
Package options include Small-Outline (DW), Chip Carriers (FK), Standard Plastic (N), and Ceramic DIPs (J).