Skip to main content
STMicroelectronics TS3021AILT — Analog & Data Acquisition

STMicroelectronics TS3021AILT Comparator, Push-Pull, 105ns

MPNTS3021AILT
End of Life

STMicroelectronics TS3021AILT general-purpose comparator, push-pull output, 105ns propagation delay, 90µA quiescent, 1.8-5V supply, SOT-23-5 package.

$2.07Ref. price · indicative, final on quote
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TS3021AILT specifications
ParameterValue
TypeGeneral Purpose
Output typePush-Pull
MountingSurface Mount
Voltage - input offset6mV @ 5V
Voltage - supply, single (Dual (±))1.8V ~ 5V
Current - quiescent90µA
Current - input bias0.16µA @ 5V
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
CaseSC-74A, SOT-753
CMRR, PSRR79dB CMRR
Number of elements1
Propagation delay105ns

Product details

Comparator with push-pull output for single-supply threshold detection

The TS3021AILT: Its push-pull output eliminates the external pull-up resistor that open-collector comparators require, saving one component per channel and simplifying the board layout for high-density designs.

Low quiescent current and wide temperature range for field-deployed gear

Maximum quiescent current is 90 µA — low enough that the comparator's own draw does not dominate the power budget in battery-operated sensors or portable instruments that sleep between readings. The -40°C to 125°C operating temperature range covers industrial enclosures, engine-bay ambient, and outdoor telecom cabinets without a temperature grade downgrade. Input offset voltage is specified at 6 mV max at 5 V — adequate for general-purpose threshold detection where the hysteresis band can be set externally to mask the offset.

SOT-23-5 package and active lifecycle for production runs

Housed in a 5-lead SOT-23-5 (SC-74A) package, the TS3021AILT fits into tight PCB layouts and can be hand-soldered with a fine-tip iron — no hot-air station required for rework in the field.

Frequently asked questions

What is TS3021AILT's propagation delay, and why does it matter?

The maximum propagation delay is 105 ns. This means the comparator output changes state within 105 ns after the input crosses the threshold — fast enough for overcurrent trip circuits, zero-crossing detection in PFC stages, and high-speed pulse-width measurement in motor drives.

Does TS3021AILT need an external pull-up resistor on the output?

No. The push-pull output stage drives both high and low actively, so no external pull-up resistor is required. This saves one component per comparator and simplifies the board layout.