Texas Instruments TLC372QDR

Overview

TLC372QDR from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for low-power, high-impedance sensing in single- or dual-supply systems. It delivers 200 ns typical propagation delay at 5V, 150 µA supply current per channel, 5 pA typical input bias current, and operates across −40°C to 125°C - enabling precision threshold detection in automotive power monitoring and industrial sensor interfaces.

For engineers reviewing the TLC372QDR datasheet, TLC372QDR pinout, TLC372QDR application, or TLC372QDR equivalent, key selection considerations include its rail-to-rail common-mode input range (including ground), TTL/MOS/CMOS-compatible open-drain outputs, ultra-low input bias current, wide 3V–16V supply range, and qualification for extended temperature operation up to 125°C.

Technical Context

The TLC372QDR integrates two independent CMOS differential-input comparators with high-gain, low-noise front ends and n-channel open-drain output stages. Its input stage achieves >10¹² Ω impedance and 5 pA bias current, enabling direct connection to high-impedance sources like thermistors or photodiodes without loading error.

Each comparator supports single-supply (3V–16V) or dual-supply operation (ΔV = 3V–16V), with common-mode input range extending from V− to VDD − 1.5 V and output sinking capability up to 16 mA. The device includes integrated ESD protection rated at 1000 V HBM and features no phase inversion within its specified input voltage window.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), tape-and-reel format (R suffix). Pinout conforms to industry-standard dual comparator layout with independent inputs and open-drain outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLC3702QDR, the TLC372QDR offers the optimal balance of ultra-low input bias current, extended temperature capability, and proven robustness in automotive power monitoring - making it preferred for high-impedance, high-reliability threshold detection where precision and ruggedness coexist.

Availability

TLC372QDR is available at Aetrix Electronics and suitable for automotive power supervision, industrial sensor interface, and embedded safety-critical monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC372QDR 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 delivering analog and embedded processing solutions, with deep expertise in precision analog, power management, and automotive-grade ICs.

The TLC372 product line targets high-reliability, low-power comparator applications in automotive, industrial, and instrumentation systems - emphasizing input integrity, thermal stability, and robust open-drain interfacing.

FAQ

What is the maximum operating supply voltage for the TLC372QDR?

The TLC372QDR has an absolute maximum supply voltage (VDD) of 18 V, but its recommended operating range is 4 V to 16 V. Operation at 16 V is fully characterized across −40°C to 125°C and supports direct interfacing with 12 V automotive systems and industrial 15 V rails. Exceeding 16 V may impact long-term reliability and is not guaranteed by TI's specifications for the TLC372QDR.

Can the TLC372QDR drive a 5 V logic input directly?

No - the TLC372QDR features open-drain outputs and cannot source current. To interface with a 5 V logic input, an external pull-up resistor to 5 V must be connected to each OUT pin. With a typical 10 kΩ pull-up, the TLC372QDR achieves VOL ≤ 400 mV at IOL = 4 mA, satisfying standard TTL and CMOS logic LOW thresholds. The TLC372QDR output remains compatible across 3.3 V, 5 V, and 12 V logic families via appropriate pull-up selection.

Does the TLC372QDR require hysteresis for stable operation?

Hysteresis is not mandatory but strongly recommended when comparing slowly varying or noisy signals near the switching threshold. The TLC372QDR's 5 mV max input offset and high gain make it susceptible to chatter without hysteresis. TI provides verified resistor networks for both inverting and non-inverting configurations in the TLC372QDR datasheet - adding just two external resistors creates a controlled trip window that eliminates false triggering in applications like temperature monitoring or power-good detection.

Is the TLC372QDR pin-compatible with the LM393 series?

Yes - the TLC372QDR uses the same SOIC-8 (D) package and identical pinout as the LM393DR and LM393P, including GND on Pin 4 and VDD on Pin 8. This allows drop-in replacement in existing LM393 layouts. However, designers must verify that the higher input impedance and wider supply range of the TLC372QDR do not interact unexpectedly with legacy bias networks or pull-up values originally optimized for bipolar LM393 input characteristics.

What is the input common-mode voltage range of the TLC372QDR at 12 V supply?

At VDD = 12 V, the TLC372QDR supports a common-mode input voltage range from 0 V (ground) to 10.5 V (VDD − 1.5 V) across its full operating temperature range (−40°C to 125°C). This allows direct connection of grounded sensors, resistive dividers referenced to GND, and reference voltages up to 10.5 V - eliminating level-shifting circuitry in most industrial and automotive sensing applications using the TLC372QDR.