STMicroelectronics TSC201IST

Overview

TSC201IST from STMicroelectronics is a high-side/low-side current sense amplifier with integrated open-drain comparator and 0.6 V internal reference, designed for overcurrent protection in automotive and industrial power systems. It delivers 50 V/V fixed gain, operates from -16 V to +80 V common-mode input range, supports 2.7–18 V supply, and maintains ≤3.5% total output error across -40 °C to +125 °C.

For engineers reviewing the TSC201IST datasheet, TSC201IST pinout, TSC201IST application, or TSC201IST equivalent, this device is selected for precision shunt-based current monitoring where wide common-mode tolerance, latchable fault detection, and AEC-Q100 qualification are required - especially in 12 V/24 V battery-fed subsystems, telecom DC-DC modules, and motor drive protection circuits.

Technical Context

The TSC201IST uses a dual-input-stage architecture (A1 active below 40% VCC, A2 above) to sustain high CMRR (>100 dB) across its full -16 V to +80 V common-mode range while maintaining low input bias current (±0.5 µA typ). Its comparator features 590–625 mV threshold, 9 mV hysteresis, and latching via active-low RESET - enabling self-holding overcurrent alerts without external logic.

It achieves 0.3 MHz bandwidth at G = 50, 7 V/µs slew rate, and 55 nV/√Hz input-referred noise at 100 kHz. Output swing reaches VCC − 0.25 V (high) and 50 mV (low) under load, with 1.8 mA max quiescent current - optimized for always-on monitoring in safety-critical 12 V automotive domains.

Key Specifications

Pinout & Package

Supplied in SO8 package (5.0 mm × 4.0 mm, 1.27 mm pitch), RoHS-compliant, with exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current sense amplifier with comparator applications.

Compared with INA282AIDR, TSC201IST reduces component count by integrating comparator and reference; versus MAX40056ASA+, it extends common-mode range to -16 V and adds AEC-Q100 qualification - critical for automotive and high-reliability telecom deployments.

Availability

TSC201IST is available at Aetrix Electronics and suitable for automotive battery management, telecom DC-DC protection, and industrial motor drive applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.

Supply support for TSC201IST 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, specializing in automotive, industrial, and power management ICs with strong vertical integration and automotive-grade process control.

The TSC201IST belongs to ST's high-voltage current sense amplifier family, engineered specifically for robust overcurrent protection in harsh environments - emphasizing wide common-mode tolerance, integrated fault detection, and AEC-Q100 reliability.

FAQ

What is the minimum shunt voltage required for accurate measurement with TSC201IST?

The TSC201IST is specified for optimal accuracy above 20 mV differential input (Vsense). Below this threshold, output error increases significantly due to reduced transconductance in the input stage - resulting in up to 0.4 V offset at Vsense = 0 mV. For reliable 1% measurement, design for ≥30 mV full-scale shunt drop.

Can TSC201IST be used for bidirectional current sensing?

No - the TSC201IST is unidirectional. Its internal architecture and comparator reference are optimized for positive current flow through the shunt. The output voltage is always ≥0 V and does not invert for reverse current; it saturates near GND when Vsense is negative beyond specification limits.

How does the RESET pin behave during power-up?

When RESET is left floating or grounded, the comparator powers up in a defined reset (LOW) state. If RESET is held HIGH at power-up, CMPOUT starts HIGH and requires an active-low pulse to latch correct comparator behavior - per DS13882 Rev 3 section 3, note 4. A 100 ns minimum pulse width is sufficient.

Is the CMPOUT pin compatible with 3.3 V logic systems?

Yes - CMPOUT is open-drain and rated for 2.7–18 V pull-up. To interface with 3.3 V logic, connect a pull-up resistor from CMPOUT to 3.3 V. The output sinks ≤300 mV at 2.35 mA, ensuring solid LOW-level compatibility with standard CMOS inputs.