Texas Instruments TLC372CDR

Overview

TLC372CDR from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for single- or dual-supply operation across 3V–16V. It delivers 200ns typical response time (TTL-level input step), 150µA typical supply current at 5V, and ultra-low 5pA typical input bias current. It operates over 0°C to 70°C and is used in precision threshold detection, window comparators, and power supply monitoring circuits.

For engineers reviewing the TLC372CDR datasheet, TLC372CDR pinout, TLC372CDR application, or TLC372CDR equivalent, key selection considerations include its open-drain output architecture, rail-to-rail common-mode input range including ground, 5mV max input offset voltage at 25°C, and compatibility with TTL/MOS/CMOS logic families via external pull-up.

Technical Context

The TLC372CDR integrates two independent high-impedance (10¹²Ω typical) CMOS differential comparators on a single die. Each channel features an n-channel open-drain output stage capable of sinking up to 16mA, enabling wired-AND logic and level translation up to 16V independent of VDD.

Its input stage supports common-mode voltages from ground to VDD −1.5V across full temperature range, and internal ESD protection provides 1000V HBM rating. The device requires no phase-inversion compensation and avoids input chatter via proper hysteresis implementation or fixed biasing of unused inputs.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), tape-and-reel format (R suffix). Pinout validated per TI SLCS114F datasheet Figure 4-1 (TLC372C D/P/PW package top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR, TLC372CDR reduces input bias current by 50× and cuts propagation delay by 90%, enabling higher-accuracy sensing and faster fault response; versus TLC372IDR, it trades extended temperature capability for lower unit cost in commercial-grade applications.

Availability

TLC372CDR is available at Aetrix Electronics and suitable for overvoltage detection, zero-crossing interfaces, level translation, and battery monitoring requiring stable component supply across commercial temperature ranges.

Supply support for TLC372CDR 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 over 90 years of innovation in precision analog ICs.

The TLC372 product line delivers low-power, high-precision dual comparators optimized for commercial-grade instrumentation, power management, and interface conditioning applications where input impedance, speed, and supply flexibility are critical.

FAQ

What is the maximum supply voltage rating for the TLC372CDR?

The absolute maximum supply voltage (VDD) for the TLC372CDR is 18V, as specified in Section 5.1 of the TI SLCS114F datasheet. However, the recommended operating range is 3V to 16V. Exceeding 16V may compromise long-term reliability or parametric performance, even if within absolute maximum limits. Always observe derating guidelines for thermal management in high-voltage applications.

Does the TLC372CDR support rail-to-rail input operation?

The TLC372CDR supports a common-mode input voltage range from 0V to VDD −1.5V across its full operating temperature range. This includes ground but does not extend fully to VDD. At 25°C, the range is 0V to VDD −1V. Therefore, while it accepts inputs down to ground (enabling single-supply use), it does not achieve true rail-to-rail input swing - inputs must remain at least 1V below VDD.

Can the TLC372CDR outputs drive TTL logic directly?

No - the TLC372CDR features open-drain outputs that can only sink current. To interface with TTL inputs, an external pull-up resistor to a compatible voltage (e.g., 5V) is required. With a properly sized pull-up (e.g., 10kΩ), the output achieves VOL ≤400mV at IOL = 4mA, satisfying TTL LOW-level input requirements. Direct connection without pull-up results in undefined or floating logic states.

Is the TLC372CDR pin-compatible with the LM393 series?

Yes - the TLC372CDR uses the same SOIC-8 (D) package and identical pin configuration as the LM393DR and LM393P. Both devices share matching pin assignments for VDD, GND, IN+, IN−, and open-drain outputs. This allows direct PCB-level substitution in most designs, though designers must verify that the TLC372CDR's CMOS input characteristics (e.g., 5pA bias current) and faster response meet system requirements.

What is the operating temperature range for the TLC372CDR?

The TLC372CDR is characterized for operation from 0°C to 70°C ambient temperature, as designated by the "C" suffix in the part number. This commercial-grade temperature range applies to all electrical specifications in the datasheet unless otherwise noted. For extended-range alternatives, consider the TLC372IDR (−40°C to 85°C) or TLC372QDR (−40°C to 125°C).