Texas Instruments TLC372MDG4

Overview

TLC372MDG4 from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for precision threshold detection in single- or dual-supply systems. It delivers 5 mV max input offset voltage, 150 µA typical supply current at 5 V, 200 ns typical propagation delay (TTL-level step), and operates across −55°C to +125°C. It serves in overvoltage/undervoltage monitoring circuits for industrial power supplies.

For engineers reviewing the TLC372MDG4 datasheet, TLC372MDG4 pinout, TLC372MDG4 application, or TLC372MDG4 equivalent, key selection considerations include its military-grade temperature range, ultra-low input bias current (5 pA typ), rail-to-rail common-mode input range including ground, open-drain output compatibility with TTL/MOS/CMOS, and pin-compatibility with LM393 for drop-in replacement in legacy designs.

Technical Context

The TLC372MDG4 integrates two independent high-impedance (10¹² Ω typ) CMOS differential comparators on a single die, each featuring an n-channel open-drain output stage capable of sinking up to 16 mA. Its input stage supports common-mode voltages from V− to VDD − 1.5 V across the full −55°C to +125°C range, enabling direct interfacing with high-impedance sensors and reference sources without level-shifting.

Operation is supported from 4 V to 16 V single supply or ±1.5 V to ±8 V dual supply (|VDD − VSS| = 3–16 V). The open-drain architecture allows wired-AND logic, level translation up to 16 V external pull-up, and flexible interface with mixed-voltage systems - critical for programmable logic controllers and battery management safety monitors.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), DG4 suffix denotes SOIC-8 with standard JEDEC MS-012AC footprint (5.3 mm × 6.2 mm, 1.27 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLC372CDR, the TLC372MDG4 uniquely combines military-grade temperature operation, ultra-low bias current, and 5 mV offset in a pin-compatible SOIC-8 package - making it the sole option for high-reliability, low-power, wide-temperature dual-comparator applications.

Availability

TLC372MDG4 is available at Aetrix Electronics and suitable for industrial power monitoring, aerospace sensor interfaces, and automotive engine control applications requiring stable component supply across extended temperature extremes and long production lifecycles.

Supply support for TLC372MDG4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.

The TLC372MDG4 belongs to TI's precision analog comparator family, engineered specifically for high-accuracy, low-power threshold detection in harsh-environment systems where reliability across extreme temperatures and minimal signal loading are mandatory design requirements.

FAQ

What is the maximum supply voltage for the TLC372MDG4?

The absolute maximum supply voltage for the TLC372MDG4 is 18 V, but the recommended operating range is 4 V to 16 V. Exceeding 16 V risks parametric degradation or permanent damage, especially under sustained load or elevated temperature. The device's internal protection diodes clamp input/output voltages to within 300 mV of the rails, so maintaining VDD ≤ 16 V ensures safe operation while preserving 200 ns propagation delay and 5 mV offset accuracy in the TLC372MDG4.

Does the TLC372MDG4 support dual-supply operation?

Yes, the TLC372MDG4 supports dual-supply operation with VDD and VSS pins (GND = VSS in single-supply mode). The difference between VDD and VSS must be 3 V to 16 V, and the common-mode input range extends from VSS to VDD − 1.5 V. This allows configurations such as ±5 V or +12 V/−5 V supplies - essential for bipolar signal conditioning in the TLC372MDG4, particularly in audio or instrumentation front-ends where ground-referenced inputs are impractical.

Can the TLC372MDG4 outputs drive TTL logic directly?

No - the TLC372MDG4 features open-drain outputs that cannot source current, so they require an external pull-up resistor to achieve a valid HIGH logic level. When pulled up to 5 V, the output sinks current to produce a LOW state compatible with TTL input thresholds (≤ 0.8 V). For direct TTL interfacing, use a 1–10 kΩ pull-up to 5 V; the TLC372MDG4's 16 mA sink capability ensures robust drive strength even with multiple TTL loads connected in wired-AND configuration.

What is the input bias current specification for the TLC372MDG4?

The TLC372MDG4 has a typical input bias current of 5 pA at 25°C, with a maximum of 20 nA over the full −55°C to +125°C range. This ultra-low value results from its CMOS input stage and enables high-impedance signal sources - such as piezoelectric sensors, pH electrodes, or high-value resistor dividers - to interface without measurable voltage error. In precision applications like battery voltage monitoring, this spec ensures the TLC372MDG4 introduces less than 1 µV error across a 100 MΩ source impedance.

Is the TLC372MDG4 pin-compatible with the LM393?

Yes, the TLC372MDG4 is fully pin-compatible with the LM393 in SOIC-8 (DG4) packaging: Pin 1 (OUT A), Pin 2 (IN− A), Pin 3 (IN+ A), Pin 4 (GND), Pin 5 (IN+ B), Pin 6 (IN− B), Pin 7 (OUT B), and Pin 8 (VDD) match identically. This allows direct substitution in existing LM393 layouts, delivering immediate benefits - including 94% lower supply current (150 µA vs. 2.5 mA), 3× lower input offset (5 mV vs. 15 mV), and extended temperature range - without PCB redesign or firmware changes for the TLC372MDG4.