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Texas Instruments SN74LS125ADBR — Analog & Data Acquisition

SN74LS125ADBR 74LS Buffer, Non-Inverting, 3-State, 14-SSOP

MPNSN74LS125ADBR
End of Life

Texas Instruments 74LS series, Logic Type Buffer, Non-Inverting, Output Type 3-State, Supply Voltage 4.75V ~ 5.25V, 4 Elements, 1 Bit per Element, Current - Output High, Low 2.6mA, 24mA, Operating Temperature 0°C ~ 70°C, Surface Mount, 14-SSOP Package.

$1.09Ref. price · indicative, final on quote
Texas Instruments SN74LS125ADBR datasheet (PDF)
Packaging14-SSOP (0.209", 5.30mm Width)
RoHSROHS3 Compliant
Series74LS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74LS125ADBR specifications
ParameterValue
Series74LS
Logic typeBuffer, Non-Inverting
Output type3-State
MountingSurface Mount
Supply voltage4.75V ~ 5.25V
Current - output high, low2.6mA, 24mA
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case14-SSOP (0.209\", 5.30mm Width)
Number of elements4
Number of bits per element1

Product details

Quad non-inverting buffer with tri-state — 74LS family, 5 V only

The SN74LS125ADBR: This part is suited for bus-oriented systems where individual output lines need to be disabled without affecting the rest of the bus — common in memory address decoding, peripheral select lines, and shared data buses in 5 V TTL environments.

Output drive and fan-out — what the 2.6 mA / 24 mA numbers mean

Output current: 2.6 mA source, 24 mA sink. The 3-state control allows multiple outputs to share a line without contention.

Package and footprint — 14-SSOP surface mount

The SSOP footprint is smaller than a standard SOIC, so verify the land pattern matches your PCB layout — it is not pin-compatible with SOIC-14 without a pad adjustment.

This makes it suitable for new designs requiring a standard 74LS logic buffer in a commercial temperature range.

Frequently asked questions

What is the closest pin-compatible alternative to SN74LS125ADBR in this component family?

Within the 74LS family, the SN74LS125ADBR is a standard quad non-inverting buffer with 3-state outputs. A pin-compatible alternative would be any other 74LS125 variant in the same 14-SSOP package, such as the SN74LS125AD (SOIC-14) — but note the package difference. For a drop-in replacement, verify the exact package code (ADBR = SSOP) before ordering.