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STMicroelectronics TL431ACDT — Analog & Data Acquisition

TL431ACDT adjustable shunt voltage reference, ±1%, 8-SOIC

MPNTL431ACDT
Active

STMicroelectronics TL431ACDT, adjustable shunt voltage reference, ±1% tolerance, 2.495 V to 36 V output, 100 mA cathode current, 600 µA minimum cathode current, 8-SOIC surface-mount package, 0°C to 70°C operating temperature.

$0.6400Ref. price · indicative, final on quote
STMicroelectronics TL431ACDT datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL431ACDT specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode600 µA
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
Case8-SOIC (0.154\", 3.90mm Width)

Product details

Adjustable shunt reference in an 8-SOIC — ±1% tolerance, 2.495 V to 36 V

It delivers a ±1% initial tolerance on the 2.495 V internal reference, and the output can be set anywhere from that minimum up to 36 V using two external resistors. Cathode current rating is 100 mA, with a minimum operating current of 600 µA.

±1% tolerance — the precision tier for this shunt reference

The ±1% tolerance on the TL431ACDT puts it in the precision band of the TL431 family. For a 2.5 V reference, that means the output sits within 25 mV of nominal at 25°C before any temperature drift. That's tight enough for most 8-bit and 12-bit ADC references, error-amplifier setpoints, and comparator thresholds.

No last-time-buy notice, no end-of-life announcement. The ROHS3 compliance is current.

Frequently asked questions

Is TL431ACDT compatible with TL431A socket?

Yes, the TL431ACDT is pin-compatible with any standard TL431A in an SOIC-8 footprint. The pinout and function are identical across the TL431A family in the same package.

Does TL431ACDT have a recommended equivalent or replacement?

The TL431ACDT is an active, standard-production part, so no replacement is needed. For a tighter tolerance, the TL431AIDT (0.5%) or TL431BIDT (0.4%) are drop-in alternatives in the same 8-SOIC package. For a wider temperature range, the TL431ACD (same tolerance, 0°C to 70°C) is the same die in a different reel option.