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Texas Instruments SN74HC688N — Analog & Data Acquisition
Texas Instruments

SN74HC688N Texas Instruments 74HC Identity Comparator, 8-bit

MPNSN74HC688N
End of Life

Texas Instruments 74HC series SN74HC688N 8-bit identity comparator, active-low output, through-hole 20-DIP (0.300", 7.62mm), 2V~6V supply, -40°C~85°C.

$1.54Ref. price · indicative, final on quote
SN74HC688N datasheet
Packaging20-DIP (0.300", 7.62mm)
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
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Specifications

SN74HC688N Technical Specifications
ParameterValue
TypeIdentity Comparator
Series74HC
Mounting typeThrough Hole
Voltage2V ~ 6V
Current - quiescent8 µA
Current - output high, low5.2mA, 5.2mA
Operating temperature-40°C ~ 85°C
OutputActive Low
PackageTube
Number of bits8
Case20-DIP (0.300\", 7.62mm)
Output functionA=B
Max propagation delay @ v, max CL36ns @ 6V, 50pF

Product details

8-bit identity comparison in a through-hole DIP

The Texas Instruments SN74HC688N is an 8-bit identity comparator from the 74HC family, comparing two 8-bit words and asserting an active-low output when they match. The 8 µA quiescent current keeps the static power draw negligible in always-on monitoring circuits.

Parametric fit for timing and temperature

For a 5 V system driving a 50 pF bus, the output settles within 36 ns, so the downstream latch must wait at least that long before reading the result.

Frequently asked questions

What is the SN74HC688N used for?

It is an 8-bit identity comparator: it compares two 8-bit words and pulls its output low when they match. Typical uses include address decoding in memory-mapped I/O systems, data-bus monitoring, and fault-detection circuits where a specific binary pattern triggers an alert.