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Texas Instruments LM1875T/LF05 — Analog & Data Acquisition

LM1875T/LF05 Class AB Audio Amplifier IC, 25W Mono, TO-220-5

MPNLM1875T/LF05
End of Life

Texas Instruments LM1875T/LF05, Class AB mono audio amplifier IC, 25W output into 8Ω, 16V–60V or ±8V–±30V supply, TO-220-5 package, through-hole mounting.

$4.45Ref. price · indicative, final on quote
Texas Instruments LM1875T/LF05 datasheet (PDF)
PackagingTO-220-5 Formed Leads
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM1875T/LF05 specifications
ParameterValue
TypeClass AB
Output type1-Channel (Mono)
MountingThrough Hole
Supply voltage16V ~ 60V, ±8V ~ 30V
Max output power x channels @ load25W x 1 @ 8Ohm
Operating temperature0°C ~ 70°C (TA)
PackageTube
FeaturesShort-Circuit and Thermal Protection
CaseTO-220-5 Formed Leads

Product details

The LM1875T/LF05 is a Class AB mono audio amplifier IC from Texas Instruments, delivering 25W into an 8Ω load from a single or split supply rail. It's built for audio output stages in powered speakers, stereo receivers, instrument amplifiers, and general-purpose line drivers where a single-channel, through-hole TO-220-5 package is preferred.

The 25W rating into 8Ω is the continuous output per channel; this part is a single-channel (mono) device, so a stereo design needs two. The TO-220-5 package with formed leads suits through-hole assembly and moderate heatsinking — plan for a heatsink rated to handle the thermal dissipation at your target output level.

Sourcing and lifecycle — still in active production

The LM1875T/LF05 is listed as Active on the manufacturer's lifecycle record, with ROHS3 compliance.

Mounting and thermal considerations

Through-hole TO-220-5 package with formed leads. The tab is the output-stage ground — electrically connected to the negative rail in split-supply configurations, so the heatsink must be isolated or the mounting hardware must insulate the tab.

Frequently asked questions

What is the difference between LM1875T and LM1875T/LF05?

The LM1875T/LF05 suffix indicates ROHS3 compliance and lead-free finish. The base LM1875T is the non-ROHS version. Electrically and functionally they are identical — same 25W output, same TO-220-5 package, same supply range.

What are the typical applications of LM1875T/LF05?

This Class AB amplifier is used in audio output stages for powered speakers, stereo receivers, instrument amplifiers, and general-purpose line drivers needing 25W into 8Ω from a single or split supply.

Can I use LM1875T/LF05 in a bridged configuration?

The LM1875T/LF05 is a single-channel (mono) device. Bridging requires two identical amplifiers with an inverted input signal. The datasheet provides application circuits for bridged operation; the output power into 8Ω roughly doubles, but the load impedance seen by each amplifier halves, so thermal and current limits must be respected.

What is the pinout of LM1875T/LF05?

The TO-220-5 pinout (viewed from the front with leads down) is: pin 1 — non-inverting input, pin 2 — inverting input, pin 3 — V- / ground, pin 4 — output, pin 5 — V+. The metal tab is electrically connected to pin 3 (V- in split-supply use).