STMicroelectronics TS3021ICT

Overview

TS3021ICT from STMicroelectronics is a single, rail-to-rail input, push-pull output high-speed comparator optimized for low-power, wide-temperature automotive and industrial applications. It delivers 38 ns propagation delay at 2 V supply, consumes only 73 µA quiescent current, operates from 1.8–5 V, and is qualified for -40 °C to 125 °C operation in SC70-5 packaging - ideal for portable communication systems and high-speed sampling front-ends.

For engineers reviewing the TS3021ICT datasheet, TS3021ICT pinout, TS3021ICT application, or TS3021ICT equivalent, key selection considerations include its micropower consumption versus speed trade-off, rail-to-rail input common-mode range across full temperature, push-pull output drive capability (up to 26 mA sink/source at 3.3 V), and AEC-Q100-compliant variants for automotive signal conditioning.

Technical Context

The TS3021ICT implements a high-gain, open-loop comparator architecture with internal biasing enabling stable operation down to 1.8 V. Its rail-to-rail input stage supports common-mode voltages from (VCC−) − 0.2 V to (VCC+) + 0.2 V at 25 °C, shrinking to full rail at 125 °C. Input offset voltage is specified at 0.5–2 mV (typ) for the TS3021A grade, with drift under 20 µV/°C over −40 °C to 125 °C.

Propagation delay is characterized across supply voltages (2 V/3.3 V/5 V), load conditions (50 pF), and overdrive levels (20–100 mV), showing monotonic improvement with higher VCC and overdrive. The push-pull output eliminates external pull-up requirements and ensures defined logic states under all operating conditions, supporting direct interfacing with CMOS/TTL inputs.

Key Specifications

Pinout & Package

TS3021ICT is supplied in the SC70-5 (SOT323-5) package: ultra-compact surface-mount outline measuring 2.0 × 2.1 × 0.9 mm (max), with coplanar gull-wing leads and 0.65 mm pitch - suitable for space-constrained portable and automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power comparator applications.

Compared with TS3021ICT, TS3021ILT offers superior thermal performance in larger packages but sacrifices miniaturization, while TS3121ICT trades push-pull convenience for open-drain flexibility and enhanced input fault tolerance - making TS3021ICT optimal for compact, self-contained high-speed thresholding where defined output states are mandatory.

Availability

TS3021ICT is available at Aetrix Electronics and suitable for portable communication systems, high-speed sampling systems, and automotive signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS3021ICT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for smart driving, power management, and sensing applications.

The TS3021 series belongs to ST's precision analog comparators product line, engineered specifically for low-power, high-speed decision-making in automotive, industrial, and portable electronics where rail-to-rail operation and AEC-Q100 compliance are essential.

FAQ

What is the maximum supply voltage for TS3021ICT?

The absolute maximum supply voltage (VCC = VCC+ − VCC−) is 5.5 V per the datasheet's Absolute Maximum Ratings table. Continuous operation above 5 V risks permanent damage. Recommended operating range is 1.8–5 V, with optimal propagation delay and current consumption achieved between 2 V and 3.3 V.

Does TS3021ICT support true rail-to-rail input at 125 °C?

Yes. At −40 °C to 125 °C, the common-mode input voltage range is guaranteed from VCC− to VCC+ - meaning both inputs accept signals equal to either supply rail. This is explicitly confirmed in Table 3 (Operating Conditions) for temperatures above 85 °C, enabling direct interfacing with sensors and DACs without external level-shifting.

Can TS3021ICT drive a 10 kΩ load directly?

Yes. With its push-pull output, TS3021ICT delivers VOH ≥ 3.20 V and VOL ≤ 80 mV at 3.3 V supply with 1 mA load (Table 5). A 10 kΩ load draws only 0.33 mA - well within output capability - resulting in <1% voltage error and negligible delay impact, eliminating need for buffer stages.

Is there a pin-compatible replacement with open-drain output?

TS3121ICT is a direct SC70-5 pin-compatible alternative with identical pinout (OUT, VCC−, IN+, IN−, VCC+) but open-drain output and fail-safe inputs. It requires an external pull-up resistor but supports wired-OR configurations and tolerates input voltages up to 6 V - verified in Table 2 of its datasheet DS4808.