Texas Instruments TLC3704MFKB

Overview

TLC3704MFKB from Texas Instruments is a quad micropower LinCMOS voltage comparator with push-pull CMOS outputs, designed for single-supply operation from 4 V to 16 V, −55°C to 125°C military temperature range, and delivering 2.7 µs typical propagation delay (t_PLH) with 5-mV overdrive at 5 V. It drives capacitive loads directly without pullup resistors and consumes only 200 µW typical supply power.

For engineers reviewing the TLC3704MFKB datasheet, TLC3704MFKB pinout, TLC3704MFKB application, or TLC3704MFKB equivalent, key selection factors include its military-grade thermal rating, rail-to-rail input common-mode range (0 V to V_DD − 1.5 V), ±8 mA output drive capability, low 10 mV max input offset voltage across full temperature range, and compatibility with TTL logic levels.

Technical Context

The TLC3704MFKB implements four independent comparators using Texas Instruments' LinCMOS process, combining high input impedance (>10¹² Ω), ultra-low input bias current (5 pA typ at 25°C), and stable input offset voltage (1.2–10 mV) under wide differential input conditions. Its push-pull output stage eliminates external pullup resistors while maintaining TTL-compatible VOH (≥4.2 V at 125°C, IOH = −4 mA) and VOL (≤500 mV at 125°C, IOL = 4 mA).

It supports robust operation in harsh environments via on-chip ESD protection rated to 2 kV HBM and 200 V CDM, and features absolute maximum ratings including ±18 V differential input voltage and −0.3 V to 18 V supply voltage range - enabling safe use during power-up/power-down transients and input overvoltage events when externally current-limited.

Key Specifications

Pinout & Package

Ceramic flatpack (FK) package, 20-pin, hermetically sealed, lead-free compatible, suitable for high-reliability aerospace and defense applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339J, TLC3704MFKB delivers 20× lower supply current and eliminates pullup components, while compared with TLC3704MD it trades plastic packaging for ceramic hermeticity and enhanced reliability in vacuum or corrosive environments - making TLC3704MFKB optimal for mission-critical aerospace deployments.

Availability

TLC3704MFKB is available at Aetrix Electronics and suitable for motor control feedback monitoring, avionics power sequencing, and remote sensor signal conditioning requiring stable component supply across extended temperature extremes and long product lifecycles.

Supply support for TLC3704MFKB 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 heritage in high-reliability military and aerospace components.

The TLC3704MFKB belongs to TI's LinCMOS comparator family, engineered specifically for low-power, high-precision threshold detection in demanding environments where temperature stability, input impedance, and supply flexibility are critical.

FAQ

What is the maximum operating supply voltage for the TLC3704MFKB?

The TLC3704MFKB supports an absolute maximum supply voltage of 18 V, with recommended operation from 4 V to 16 V. This wide range allows direct use with unregulated 12 V or 15 V rails common in military and industrial systems, while maintaining specified performance including 10 mV max input offset voltage and 2.7 µs propagation delay across the full −55°C to 125°C temperature range.

Does the TLC3704MFKB require external pullup resistors on its outputs?

No, the TLC3704MFKB does not require external pullup resistors because it features a push-pull CMOS output stage capable of sourcing and sinking ±8 mA. This architecture eliminates the power loss, board space, and component cost associated with pullup resistors - a key differentiator from open-collector comparators like the LM339J - and enables direct interfacing with TTL and CMOS logic inputs without additional circuitry.

How does the TLC3704MFKB handle input voltages exceeding the supply rail?

The TLC3704MFKB tolerates differential input voltages up to ±18 V and common-mode inputs from −0.3 V to V_DD, but sustained input voltages above V_DD must be externally current-limited to ±5 mA to prevent damage. Its patented ESD protection circuitry clamps overvoltage transients safely, and internal current limiting activates via Q1 saturation when inputs exceed V_DD by ~0.7 V - ensuring robustness during power-up sequencing and fault conditions without external diodes.

What is the input bias current specification for the TLC3704MFKB at elevated temperature?

At 125°C, the TLC3704MFKB exhibits a maximum input bias current of 30 nA, measured at V_IC = 2.5 V. This remains exceptionally low compared to bipolar comparators and supports high-impedance sensor interfaces such as piezoelectric transducers or pH electrodes where leakage currents would otherwise distort measurements - a direct benefit of TI's LinCMOS process technology used in the TLC3704MFKB.

Is the TLC3704MFKB pin-compatible with other variants in the TLC3704 family?

Yes, the TLC3704MFKB shares identical pinout and electrical functionality with all TLC3704 variants (e.g., TLC3704CD, TLC3704ID, TLC3704MD), including the same 20-pin FK package layout and terminal assignments. This allows drop-in replacement across commercial, industrial, and military grades when thermal or reliability requirements change - provided the design accommodates the specific supply voltage range (TLC3704M requires minimum 4 V vs. 3 V for C/I/Q versions).