Texas Instruments TLC374CDR

Overview

TLC374CDR from Texas Instruments is a LinCMOS™ quadruple differential comparator IC designed for single- or dual-supply operation across 2 V to 18 V. It features four independent open-drain comparators with 5 pA typical input bias current, 200 ns typical response time (TTL-level step), and 0.3 mA typical supply current at 5 V - enabling precision threshold detection in battery-powered sensor interfaces and industrial control logic.

For engineers reviewing the TLC374CDR datasheet, TLC374CDR pinout, TLC374CDR application, or TLC374CDR equivalent, key selection criteria include its 0°C to 70°C temperature rating, SOIC-14 package with R-suffix tape-and-reel delivery, n-channel open-drain outputs compatible with TTL/MOS/CMOS, and pin compatibility with LM339 for drop-in replacement in legacy designs.

Technical Context

The TLC374CDR implements four independent voltage comparators on a LinCMOS™ process, delivering ultra-high input impedance (>10¹² Ω) and rail-to-rail common-mode input range including ground. Its n-channel open-drain output stage supports wired-AND configurations and level translation via external pull-up resistors.

Designed for robustness, it integrates TI's patented ESD protection circuitry rated to 1000 V (HBM), with input voltage tolerance from –0.3 V to 18 V and unlimited output short-circuit duration to ground - critical for noisy industrial environments where input overvoltage transients occur during power sequencing.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 3.91 mm body, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited floor life).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLC374IDR, the TLC374CDR delivers superior input accuracy (5 mV max offset vs. 7 mV), lower power (0.3 mA vs. 0.5 mA), and integrated ESD protection - making it the preferred choice for new commercial designs prioritizing precision, reliability, and layout simplicity.

Availability

TLC374CDR is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control logic, and legacy comparator upgrades requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for TLC374CDR 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 TLC374CDR belongs to TI's LinCMOS™ comparator family, engineered for high-input-impedance, low-power, and robust operation in commercial-grade sensor signal conditioning and power monitoring applications.

FAQ

What is the maximum supply voltage for the TLC374CDR?

The TLC374CDR supports an absolute maximum supply voltage of 18 V on the VDD pin. Its recommended operating range is 2 V to 16 V for the TLC374C grade. Exceeding 18 V risks permanent damage, while operation below 2 V may result in unreliable output switching behavior. Always observe the 18 V limit during transient conditions such as power-up surges.

Does the TLC374CDR require external pull-up resistors on its outputs?

Yes, the TLC374CDR features n-channel open-drain outputs that require external pull-up resistors to define the high logic level. Each output (pins 1, 2, 11, 12) must be connected to a pull-up resistor tied to a valid logic rail (e.g., 3.3 V or 5 V). Typical values range from 2.2 kΩ to 10 kΩ depending on speed and drive strength requirements. Without pull-ups, outputs remain floating and cannot assert a valid HIGH state.

Is the TLC374CDR pin-compatible with the LM339?

Yes, the TLC374CDR is pin-compatible with the LM339 in the SOIC-14 (D) package. Both devices share identical pin assignments for inputs, outputs, VDD, and GND. This allows direct substitution in existing LM339-based designs without PCB modification. However, note that the TLC374CDR offers lower input bias current (5 pA vs. 250 nA), faster response (200 ns vs. 300 ns), and integrated ESD protection not present in standard LM339 variants.

What is the operating temperature range of the TLC374CDR?

The TLC374CDR is characterized for operation from 0°C to 70°C - the commercial temperature grade (TLC374C). This range covers typical indoor electronics environments including consumer devices, test equipment, and office automation systems. For applications requiring extended temperature operation (e.g., –40°C to 85°C), the TLC374IDR variant should be selected instead.

Can the TLC374CDR operate from a dual supply?

Yes, the TLC374CDR supports dual-supply operation provided the difference between the positive and negative supply rails is maintained between 2 V and 18 V. In this configuration, the GND pin becomes the reference midpoint, and input common-mode range extends from the negative rail to VDD–1 V. Dual-supply use is common in bipolar signal conditioning applications where inputs swing above and below ground.