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Texas Instruments LM334SM — Discrete Semiconductors

LM334SM Current Source, ±6%, 8-SOIC, Active

MPNLM334SM
End of Life

Texas Instruments LM334SM adjustable current source, ±6% accuracy, 1 V to 40 V input range, 8-SOIC surface mount package, 0 °C to 70 °C operating temperature.

$1.3Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM334SM specifications
ParameterValue
MountingSurface Mount
Voltage - input1V ~ 40V
Output currentAdjustable
Operating temperature0°C ~ 70°C
PackageBulk
Accuracy±6%
FunctionCurrent Source
Case8-SOIC (0.154\", 3.90mm Width)

Product details

Active production — BOM-fit note

The LM334SM: This is a three-terminal adjustable current source, not a fixed regulator: the output current is set by one external resistor between the R and V− pins, and the part regulates that current regardless of load or supply voltage within the 1 V to 40 V compliance range. The ±6% initial accuracy means the set-point resistor must be trimmed or selected to hit the target current within that tolerance band — a 1% resistor alone does not tighten the overall error, because the LM334's own offset dominates.

Package and temperature grade

The package is listed as Bulk in the supply format — not tape-and-reel, so plan for tube or tray handling at the pick-and-place feeder if the line expects reeled parts.

RoHS status and compliance

Marked RoHS non-compliant — the device carries tin-lead (SnPb) termination finish, which is exempt under certain RoHS categories (military, aerospace, medical implant) and still preferred in high-reliability solder joints where tin whisker risk is unacceptable.

Frequently asked questions

What is the LM334SM's accuracy and how does it affect the current set-point?

The initial accuracy is ±6%. This means the actual output current at a given resistor value can vary by up to 6% from the calculated target. The designer should either select the resistor empirically or account for this tolerance in the system budget.

What compliance documentation does Texas Instruments provide for LM334SM?

The device is RoHS non-compliant due to tin-lead termination finish. No REACH, UL, or IEC certification is listed in the available records. For specific compliance certificates, the buyer should request them at RFQ time.