Texas Instruments TLC352CP

Overview

TLC352CP from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for low-power, single- or dual-supply operation across 2.7V to 18V. It delivers 5 mV max input offset voltage at 25°C, 5 pA typical input bias current, and 150 µA typical supply current at 5V - enabling precision threshold detection in battery-powered sensor interfaces and power management circuits.

For engineers reviewing the TLC352CP datasheet, TLC352CP pinout, TLC352CP application, or TLC352CP equivalent, key selection considerations include its rail-to-rail common-mode input range (including ground), TTL/MOS/CMOS-compatible open-drain outputs, industrial-grade temperature rating (0°C to 70°C), and pin compatibility with LM393 in PDIP-8 packaging.

Technical Context

The TLC352CP integrates two independent high-impedance (10¹² Ω typical) comparators fabricated in CMOS technology, supporting operation from a single supply as low as 2.7V or dual supplies with total differential voltage between 2.7V and 18V. Its input stage avoids phase inversion within the full common-mode range (0 V to VDD − 1.5 V), and its open-drain outputs allow wired-AND logic and level translation up to 16V independent of VDD.

Each comparator features built-in ESD protection rated at 2000V HBM, with clamp diodes limiting input overvoltage to ±300mV beyond rails. Unused inputs require ≥50mV differential biasing - not direct shorting - to prevent noise-induced chatter due to ultra-low offset (1–5 mV) and high gain.

Key Specifications

Pinout & Package

Package: PDIP-8 (Plastic Dual In-line Package), 0.300-inch body width, through-hole mounting, RoHS-compliant NiPdAu lead finish, no MSL rating (through-hole).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393N and TLC372CP, the TLC352CP provides the best balance of low offset (5 mV), ultra-low bias current (5 pA), and ground-sensing capability - making it optimal for precision, single-supply, battery-operated systems requiring long-term stability.

Availability

TLC352CP is available at Aetrix Electronics and suitable for battery voltage monitoring, over-temperature protection, power supply sequencing, zero-crossing detection, and industrial sensor interface applications requiring stable component supply and long-lifecycle support.

Supply support for TLC352CP 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, embedded processing, and digital signal technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.

The TLC352CP belongs to TI's precision comparator product line, engineered for low-power, high-input-impedance applications in battery-powered instrumentation, industrial controls, and power management systems where accuracy and supply flexibility are critical.

FAQ

What is the maximum supply voltage rating for the TLC352CP?

The TLC352CP has an absolute maximum supply voltage (VDD) rating of 18 V, as specified in Section 4.1 of the datasheet. Operation beyond this voltage risks permanent damage. For reliable long-term use, TI recommends staying within the recommended operating range of 2.7 V to 16 V - the upper limit cited in Section 4.2 for both TLC352C and TLC352I variants. The TLC352CP itself is characterized for 0°C to 70°C and supports this full 2.7–16 V range.

Does the TLC352CP support single-supply operation with input signals referenced to ground?

Yes, the TLC352CP fully supports single-supply operation with ground-referenced inputs. Its common-mode input voltage range extends from 0 V to VDD − 1.5 V across the full temperature range (0°C to 70°C), explicitly including ground. This allows direct connection of resistive dividers, thermistors, or other ground-referenced sensors without level-shifting circuitry - a key advantage over many older comparators. This behavior is confirmed in Sections 4.2 and 6.4.1 of the TLC352CP datasheet.

What is the typical input bias current of the TLC352CP, and why does it matter?

The TLC352CP has a typical input bias current of 5 pA at 25°C, with a maximum of 2 nA over temperature. This ultra-low value matters because it minimizes loading error on high-impedance sources such as photodiodes, piezoelectric sensors, or RC timing networks. For example, a 10 MΩ source impedance would introduce only 50 µV of error (5 pA × 10 MΩ), preserving signal integrity in precision threshold detection. This performance stems from its CMOS input stage, detailed in Section 1 (Features) and Section 4.3 (Electrical Characteristics).

Can the TLC352CP outputs drive TTL, MOS, and CMOS logic directly?

The TLC352CP outputs are open-drain N-channel devices and cannot drive TTL, MOS, or CMOS logic *directly* without an external pull-up resistor. However, with a properly sized pull-up (TI recommends 100 µA to 1 mA current), the outputs are fully compatible with TTL, MOS, and CMOS logic families - as stated in Section 1 (Features). The pull-up voltage can be up to 16 V, independent of VDD, enabling level translation. Section 6.4.4 confirms this architecture and warns against shorting outputs to VDD to prevent thermal runaway.

Is the TLC352CP pin-compatible with the LM393, and what are the benefits of substitution?

Yes, the TLC352CP is pin-compatible with the LM393 in the PDIP-8 package, sharing identical pin assignments and basic functionality. Substituting TLC352CP for LM393 delivers measurable benefits: 5 mV vs. 7 mV max input offset, 150 µA vs. ~1 mA supply current, 5 pA vs. ~25 nA input bias current, and integrated 2000V HBM ESD protection - all while maintaining the same footprint and layout. These improvements enhance accuracy, extend battery life, reduce sensor loading, and improve robustness in new or upgraded designs.