Texas Instruments TLC372IDRG4

Overview

TLC372IDRG4 from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for low-power, precision threshold detection in single- or dual-supply systems. It delivers 200 ns typical propagation delay at 5V, 150 µA supply current per channel, and 5 pA typical input bias current - enabling high-impedance sensor interfacing in battery-powered industrial monitoring and power management circuits.

For engineers reviewing the TLC372IDRG4 datasheet, TLC372IDRG4 pinout, TLC372IDRG4 application, or TLC372IDRG4 equivalent, key selection considerations include its −40°C to 85°C operating range, 3V–16V supply flexibility, rail-to-rail common-mode input (down to ground), ultra-low input current, and open-drain output compatibility with TTL/MOS/CMOS logic families.

Technical Context

The TLC372IDRG4 integrates two independent CMOS differential comparators sharing a single supply (or dual supplies with 3V–16V total difference). Its high-impedance input stage (10¹² Ω) and 5 pA bias current enable direct connection to high-Z sources like thermistors or photodiodes without loading error. Each comparator features an n-channel open-drain output capable of sinking up to 16 mA while supporting external pull-up voltages up to 16 V - decoupling logic-level translation from supply voltage constraints.

Internal ESD protection (1000 V HBM) and ultra-stable 1 mV typical input offset voltage support reliable operation in noisy industrial environments. The device avoids phase inversion across its full common-mode range (0 V to VDD − 1.5 V), and its 200 ns response time ensures accurate timing in fast edge-detection applications such as overvoltage latch or zero-crossing detection.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.27 mm pitch, tape-and-reel (R suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Compared with LM393DR and TLC372CDR, the TLC372IDRG4 uniquely combines industrial temperature range, picoampere input bias, and 3 V operation - making it the optimal choice for precision, low-power, wide-temperature sensing where signal fidelity and reliability are critical.

Availability

TLC372IDRG4 is available at Aetrix Electronics and suitable for industrial power monitoring, battery management systems, and embedded sensor interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC372IDRG4 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision analog ICs and industrial-grade components.

The TLC372IDRG4 belongs to TI's precision comparator product line, engineered specifically for low-power, high-impedance threshold detection in industrial automation, power supply supervision, and sensor signal conditioning applications.

FAQ

What is the maximum supply voltage for the TLC372IDRG4?

The TLC372IDRG4 has an absolute maximum supply voltage (VDD) rating of 18 V, but its recommended operating range is 3 V to 16 V. Operation beyond 16 V risks exceeding safe power dissipation limits and may degrade long-term reliability. The device is commonly used at 5 V or 12 V in industrial control and power monitoring circuits, and the TLC372IDRG4 maintains full specification compliance across this entire 3–16 V span.

Does the TLC372IDRG4 support rail-to-rail input operation?

Yes, the TLC372IDRG4 supports a common-mode input voltage range from 0 V to VDD − 1.5 V over its full operating temperature range. This includes ground-referenced inputs, enabling direct interface with signals referenced to system ground - such as battery voltage dividers or current-sense amplifier outputs. The TLC372IDRG4 does not support true rail-to-rail (0 V to VDD) input, but the −1.5 V headroom is sufficient for most industrial sensing applications.

Can the TLC372IDRG4 outputs drive a 12 V logic load?

Yes, the TLC372IDRG4 open-drain outputs can sink current while pulling up to an external voltage up to 16 V - independent of the VDD supply. To drive a 12 V logic load, connect a pull-up resistor from OUTx to a 12 V rail. The TLC372IDRG4 will sink up to 16 mA (at VOL ≤ 400 mV), allowing robust interfacing with higher-voltage logic families or discrete loads without level shifters.

Is the TLC372IDRG4 pin-compatible with the LM393?

Yes, the TLC372IDRG4 is pin-compatible with the LM393 in SOIC-8 (D) packages, sharing identical pin assignments for VDD, GND, IN+, IN−, and OUT per channel. This allows direct replacement in existing LM393 layouts. However, the TLC372IDRG4 offers superior performance: 5 pA vs. 250 nA input bias, 150 µA vs. 400 µA supply current, and extended temperature range - making the TLC372IDRG4 a functional and mechanical upgrade.

What is the typical input offset voltage of the TLC372IDRG4?

The TLC372IDRG4 has a typical input offset voltage of 1 mV at 25°C, with a maximum of 5 mV over temperature (−40°C to +85°C). This low offset enables precise threshold setting in applications such as window comparators or battery end-of-discharge detection, where trip-point accuracy directly impacts system safety and performance. The TLC372IDRG4's offset remains stable across supply and temperature variations, supporting consistent behavior in unregulated or thermally variable environments.