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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments TLC139MFKB

Name: TLC139MFKB
Brand: Texas Instruments
SKU: TLC139MFKB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLC139MFKB

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: 20-CLCC

Datasheet:: TLC139MFKB.pdf

Description:: QUAD, MICROPOWER, LINCMOS COMPAR

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Product details

Overview

TLC139MFKB from Texas Instruments is a quad differential voltage comparator with open-drain CMOS outputs, designed for single-supply operation from 4 V to 16 V across −55°C to 125°C. It delivers 2.5 µs typical propagation delay at 5-mV overdrive, consumes only 200 µW typical at 5 V, and features 10¹² Ω typical input impedance - enabling precision threshold detection in military-grade power monitoring and motor control circuits.

For engineers reviewing the TLC139MFKB datasheet, TLC139MFKB pinout, TLC139MFKB application, or TLC139MFKB equivalent, key selection criteria include its military-temperature-rated LCCC-20 package, 10 mV max input offset voltage over full temperature range, open-drain output compatibility with wired-AND logic, and LinCMOS™ process stability under differential input stress.

Technical Context

The TLC139MFKB implements four independent comparators using Texas Instruments' LinCMOS™ process, delivering CMOS-level power efficiency (80 µA max supply current) without sacrificing speed or input stability. Its input stage maintains 10¹² Ω impedance and <15 nA input bias current at 125°C, while the open-drain output supports rail-to-rail sinking up to 20 mA per channel with no internal pull-up.

Unlike bipolar comparators, the LinCMOS™ architecture ensures negligible input offset drift (0.23 µV/month), stable common-mode rejection (84 dB min) and supply-voltage rejection (84 dB min) across −55°C to 125°C - critical for unregulated supply supervision and analog signal conditioning in harsh environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4 V to 16 V - enables direct interface with 5 V, 12 V, and unregulated industrial rails without level-shifting.
Propagation Delay (tPLH/tPHL)	2.5 µs typ at 5-mV overdrive - supports fast response in PWM timing and fault-detection loops.
Input Offset Voltage (VIO)	10 mV max over −55°C to 125°C - ensures reliable switching thresholds in wide-temperature sensor interfaces.
Supply Current (IDD)	175 µA max (four comparators, outputs low) - allows battery-backed or low-power supervisory functions.
Input Impedance	10¹² Ω typ - minimizes loading on high-impedance sources like thermistors or photodiode amplifiers.
Output Configuration	Open-drain CMOS - permits flexible pull-up to any voltage ≤18 V and wired-AND bus interfacing.
ESD Protection	On-chip protection rated to 2000 V (MIL-STD-883C, Method 3015.2) - reduces need for external transient suppression.

Pinout & Package

LCCC-20 (FK) ceramic package with 20 leads, hermetically sealed, lead-free SNPB finish, rated for −55°C to 125°C operation and 260°C reflow (60 s).

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for all comparators and output stages; must be low-impedance connection to minimize noise coupling.
2	NC	No internal connection - left floating or grounded per layout best practices; not usable as signal or power path.
3	4IN+	Non-inverting input of Comparator 4 - accepts analog signals within 0 V to (VDD − 1.5 V) common-mode range.
4	NC	No internal connection - electrically isolated; no routing or termination required.
5	4IN−	Inverting input of Comparator 4 - paired with Pin 3 for differential threshold comparison.
6	VDD	Positive supply rail for all four comparators - requires local 0.1 µF ceramic decoupling capacitor.
7	NC	No internal connection - unused pad; avoid routing traces or vias beneath this pin.
8	2IN−	Inverting input of Comparator 2 - shares same input voltage range and bias current specs as other inputs.
9	NC	No internal connection - no electrical function; maintain clearance in PCB layout.
10	2IN+	Non-inverting input of Comparator 2 - used for independent signal comparison or reference tracking.
11	2OUT	Open-drain output of Comparator 2 - sinks current when active; requires external pull-up resistor.
12	1OUT	Open-drain output of Comparator 1 - identical electrical behavior to Pin 11; supports wired-AND with other outputs.
13	NC	No internal connection - no internal bond wire; leave unconnected per TI design guidelines.
14	3IN+	Non-inverting input of Comparator 3 - enables third independent threshold detection channel.
15	3OUT	Open-drain output of Comparator 3 - compatible with 3.3 V, 5 V, or 12 V pull-up networks.
16	1IN−	Inverting input of Comparator 1 - forms first differential pair with Pin 17.
17	1IN+	Non-inverting input of Comparator 1 - primary input for high-precision zero-crossing or overvoltage detection.
18	NC	No internal connection - no internal circuitry; omit from netlist and schematic symbol.
19	3IN−	Inverting input of Comparator 3 - completes fourth differential input pair with Pin 14.
20	NC	No internal connection - mechanical pad only; no electrical or thermal function.

Key Features

Feature	Design Value
LinCMOS™ Process Technology	Enables 1/20th the power of LM139-family comparators while maintaining comparable speed and input stability under differential stress.
Military Temperature Rating	Qualified from −55°C to 125°C - suitable for avionics, defense systems, and downhole instrumentation where commercial parts fail.
Open-Drain Output Architecture	Supports mixed-voltage interfacing (e.g., 3.3 V logic sensing 12 V rail) and hardware-wired logic without external diodes.
Ultra-Low Input Bias Current	≤30 nA at 125°C - preserves accuracy in high-impedance sensor front-ends such as pH probes or piezoelectric transducers.
Stable Input Offset Drift	0.23 µV/month including first 30 days - eliminates recalibration needs in long-life embedded monitoring applications.

Applications

Power Supply Supervision	PWM Motor Control
Use Scenario: Monitoring 5 V and 12 V rails in a ruggedized industrial controller to trigger microprocessor reset or fault interrupt before undervoltage lockout. IC Role / Device Role / Timing Role: TLC139MFKB acts as dual-rail supervisor with independent comparators configured for early power-fail warning and hard reset generation. Use Value: Delivers deterministic response within 2.5 µs at 5-mV overdrive, ensuring system shutdown occurs before brownout-induced corruption.	Use Scenario: Generating variable-duty-cycle gate drive signals for half-bridge motor drivers in aerospace actuation systems. IC Role / Device Role / Timing Role: TLC139MFKB compares sawtooth oscillator voltage against adjustable DC reference to produce precise PWM waveform. Use Value: LinCMOS™ input stability prevents duty-cycle drift across −55°C to 125°C, maintaining torque consistency in extreme ambient conditions.
Two-Phase Clock Generation	Analog Signal Threshold Detection
Use Scenario: Creating nonoverlapping clock phases for synchronous sampling in radiation-hardened data acquisition modules. IC Role / Device Role / Timing Role: TLC139MFKB implements cross-coupled comparator pairs to generate complementary, dead-time-controlled clock edges. Use Value: 10¹² Ω input impedance prevents loading of RC timing networks, preserving phase accuracy and jitter performance.	Use Scenario: Detecting zero-crossing events in AC line-synchronized power converters operating in outdoor substations. IC Role / Device Role / Timing Role: TLC139MFKB serves as precision zero-crossing detector with hysteresis applied via feedback resistors. Use Value: 10 mV max VIO over full temperature range ensures consistent crossing point across seasonal thermal cycles.

Power Supply Supervision

PWM Motor Control

Use Scenario: Monitoring 5 V and 12 V rails in a ruggedized industrial controller to trigger microprocessor reset or fault interrupt before undervoltage lockout.

IC Role / Device Role / Timing Role: TLC139MFKB acts as dual-rail supervisor with independent comparators configured for early power-fail warning and hard reset generation.

Use Value: Delivers deterministic response within 2.5 µs at 5-mV overdrive, ensuring system shutdown occurs before brownout-induced corruption.

Use Scenario: Generating variable-duty-cycle gate drive signals for half-bridge motor drivers in aerospace actuation systems.

IC Role / Device Role / Timing Role: TLC139MFKB compares sawtooth oscillator voltage against adjustable DC reference to produce precise PWM waveform.

Use Value: LinCMOS™ input stability prevents duty-cycle drift across −55°C to 125°C, maintaining torque consistency in extreme ambient conditions.

Two-Phase Clock Generation

Analog Signal Threshold Detection

Use Scenario: Creating nonoverlapping clock phases for synchronous sampling in radiation-hardened data acquisition modules.

IC Role / Device Role / Timing Role: TLC139MFKB implements cross-coupled comparator pairs to generate complementary, dead-time-controlled clock edges.

Use Value: 10¹² Ω input impedance prevents loading of RC timing networks, preserving phase accuracy and jitter performance.

Use Scenario: Detecting zero-crossing events in AC line-synchronized power converters operating in outdoor substations.

IC Role / Device Role / Timing Role: TLC139MFKB serves as precision zero-crossing detector with hysteresis applied via feedback resistors.

Use Value: 10 mV max VIO over full temperature range ensures consistent crossing point across seasonal thermal cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM139J	Bipolar process; 1.3 mA typical supply current; 300 ns faster but 65× higher power; no ESD protection.	Not qualified for −55°C operation; unsuitable for low-power or high-reliability military use.	Select LM139J only if speed >2 µs is mandatory and power budget allows >1 mA per comparator.
TLC339MFK	Same LinCMOS™ process, identical pinout and specs - differs only in part numbering convention and screening documentation.	Functionally identical; used interchangeably in TI's military-spec production lines.	TLC339MFK is a direct functional match with identical performance and qualification; verify marking and traceability requirements.

Compared with LM139J, TLC139MFKB reduces supply current by 98% while maintaining sub-3 µs response, making it viable for thermally constrained or battery-assisted systems; versus TLC339MFK, it offers identical electrical behavior but distinct MIL-PRF-38535 compliance documentation for Class B or K applications.

Availability

TLC139MFKB is available at Aetrix Electronics and suitable for military-grade power supervision, ruggedized motor control, and two-phase clock generation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TLC139MFKB 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 TLC139MFKB belongs to TI's LinCMOS™ precision comparator family, engineered specifically for low-power, high-stability threshold detection in mission-critical systems operating across extreme temperature and voltage conditions.

FAQ

What is the maximum operating temperature range for the TLC139MFKB?

The TLC139MFKB is fully characterized and qualified for continuous operation from −55°C to 125°C. This military-grade temperature rating is verified per MIL-PRF-38535 requirements and applies to all electrical specifications including propagation delay, input offset voltage, and supply current - unlike commercial variants such as TLC339C which are limited to 0°C–70°C.

Does the TLC139MFKB require external pull-up resistors on its outputs?

Yes, the TLC139MFKB features open-drain CMOS outputs that require external pull-up resistors to define the high-state voltage level. Each output can sink up to 20 mA, and the pull-up voltage may be set independently (e.g., 3.3 V, 5 V, or 12 V) as long as it does not exceed VDD + 0.3 V. The TLC139MFKB itself contains no internal pull-up circuitry.

Can the TLC139MFKB be used with a 3 V supply?

No, the TLC139MFKB has a minimum supply voltage of 4 V as specified in its recommended operating conditions. For 3 V operation, engineers should consider the TLC339C or TLC339I variants, which support 3 V to 16 V supplies but are not rated for the −55°C to 125°C range of the TLC139MFKB.

How does the LinCMOS™ process improve input stability in the TLC139MFKB?

The LinCMOS™ process in the TLC139MFKB provides extremely stable input offset voltage - drifting only 0.23 µV/month including the first 30 days - and maintains high common-mode rejection (84 dB min) even under multi-volt differential input stress. This stability eliminates calibration drift in long-duration field deployments, a key advantage over standard CMOS or bipolar comparators.

Is the TLC139MFKB pin-compatible with the LM139 family?

No, the TLC139MFKB uses a 20-pin LCCC (FK) package, whereas the LM139 family uses 14-pin PDIP, SOIC, or CDIP packages. Although both are quad comparators with open-drain outputs, the TLC139MFKB's FK package has different pin assignments, including multiple NC pins and separate ground/supply connections - requiring PCB redesign for substitution.

TLC139MFKB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 20-CLCC

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: General Purpose

Number of Elements:: 4

Output Type:: CMOS, Open-Drain

Voltage - Supply, Single/Dual (±):: 4V ~ 16V

:: 5mV @ 10V

Voltage - Input Offset (Max):: 5pA @ 5V

Current - Input Bias (Max):: 20mA

Current - Output (Typ):: 80µA

Current - Quiescent (Max):: 84dB CMRR, 85dB PSRR

CMRR, PSRR (Typ):: 3.6µs (Typ)

Propagation Delay (Max):: -

Hysteresis:: -55°C ~ 125°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 20-LCCC (8.89x8.89)

TLC139MFKB FAQ

1.How can I place an order for TLC139MFKB through Aetrix?

Please submit a Request for Quotation (RFQ) for TLC139MFKB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLC139MFKB reliable?

The price and inventory of TLC139MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC139MFKB is usually 5 days.

3.What payment methods are accepted for TLC139MFKB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC139MFKB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLC139MFKB?

TLC139MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLC139MFKB order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLC139MFKB?

For technical support, including TLC139MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC139MFKB requirements.

6.How does Aetrix verify that TLC139MFKB is sourced from the original manufacturer or authorized distributors?

All TLC139MFKB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLC139MFKB meets industry standards.

7.What is the process for return or replacement of TLC139MFKB?

All TLC139MFKB units undergo pre-shipment inspection (PSI). If there is an issue with TLC139MFKB, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLC139MFKB part is unused and in its original packaging.

Return procedure for TLC139MFKB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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