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Texas Instruments 54LS173FMQB — Analog & Data Acquisition
Texas Instruments

54LS173FMQB D Flip-Flop, LS Series, Active

MPN54LS173FMQB
End of Life

54LS173FMQB, D FLIP-FLOP, LS SERIES, Bulk package, active lifecycle stage.

$1.54Ref. price · indicative, final on quote
54LS173FMQB datasheet
StockContact for availability
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.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

54LS173FMQB Technical Specifications
ParameterValue
Series*
PackageBulk

Product details

What this part is — 54LS173FMQB

The 54LS173FMQB is a D flip-flop from the LS series. It is a quad D flip-flop with clear and complementary outputs.

Lifecycle and sourcing reality

The product status is Active.

Package and handling note

For a military-grade DIP or flatpack (the 54LS173FMQB suffix suggests a ceramic or hermetic package variant), Bulk delivery is standard: the parts arrive in anti-static tubes or waffle trays, suitable for hand-insertion, rework stations, or low-volume prototype runs. If your line runs automated assembly, confirm the package body style and lead form before ordering — Bulk can be hand-placed or re-taped on request.

Frequently asked questions

What is the difference between 54LS173FMQB and 74LS173?

Both are quad D flip-flops in the LS logic family. The 54LS173FMQB is the military-temperature-grade version (-55 to 125 °C) with tighter screening and burn-in, while the 74LS173 is the commercial-grade (0 to 70 °C) variant. Choose the 54-series for avionics, satellite, or downhole applications; the 74-series is sufficient for conditioned indoor equipment.

What is the closest functional second-source for 54LS173FMQB?

The SNJ54AS74J is a peer from the AS (Advanced Schottky) series — faster propagation delay but higher power draw. Both are 54-series military-grade quad D flip-flops. The AS part may be a drop-in for speed-critical paths where the LS timing margin is tight, but verify the pinout and package footprint match your board before substituting.