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Texas Instruments TLC374MFKB
- Part No.:
- TLC374MFKB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
TLC374MFKB.pdf
- Description:
- TLC374M LOW-POWER LINCMOS QUAD C
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Inventory:4,911
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Product details
Overview
TLC374MFKB from Texas Instruments is a military-grade LinCMOS™ quadruple differential comparator IC operating from single or dual supplies (4 V to 16 V), featuring 5 mV max input offset voltage at 25°C, 5 pA typical input bias current, and 200 ns typical response time for TTL-level inputs. It delivers n-channel open-drain outputs compatible with TTL/MOS/CMOS logic and is designed for precision threshold detection in harsh-environment analog monitoring systems.
For engineers reviewing the TLC374MFKB datasheet, TLC374MFKB pinout, TLC374MFKB application, or TLC374MFKB equivalent, this page provides verified military-temperature-range specifications, FK-package terminal mapping, LinCMOS™ ESD protection details, and direct alternatives for high-reliability comparator replacement in aerospace, defense, and industrial control designs.
Technical Context
The TLC374MFKB implements four independent voltage comparators using Texas Instruments' LinCMOS™ process - a linear polysilicon-gate CMOS technology optimized for single-supply analog operation. Each channel features ultrahigh input impedance (>10¹² Ω) and rail-to-rail common-mode input range including ground.
Its n-channel open-drain output stage enables wired-AND logic configurations and supports external pull-up to voltages up to 18 V. Internal ESD protection meets 1000-V HBM rating, and the device is characterized across –55°C to +125°C per MIL-PRF-38535 Class B requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4 V to 16 V - supports single-supply operation down to 4 V, enabling compatibility with 5 V and 12 V industrial rails without level-shifting. |
| Input Offset Voltage (max) | 5 mV at 25°C - ensures accurate threshold detection with ≤5 mV error margin in precision window-comparator or zero-crossing circuits. |
| Input Bias Current (typ) | 5 pA - allows direct interfacing with high-impedance sensors (e.g., thermistors, photodiodes) without significant loading error. |
| Response Time (typ) | 200 ns for TTL-level step - enables fast edge detection in pulse-width monitoring, overvoltage lockout, and digital signal conditioning. |
| Operating Temperature | –55°C to +125°C - qualified to full military temperature range, suitable for embedded avionics, downhole tools, and engine-control modules. |
| Output Configuration | N-channel open-drain - permits flexible logic-level translation via external pull-up and supports wired-AND bus architectures. |
| ESD Rating (HBM) | 1000 V - integrated protection circuitry reduces risk of gate oxide damage during handling and board assembly. |
Pinout & Package
LCCC (FK) package: 20-pin ceramic leadless chip carrier, hermetically sealed, with no internal connection on pins 2, 4, 6, 8, 10, 12, 15, 16, 17, and 19. Pin 12 connects internally to chip backside for thermal and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT, 2OUT, 3OUT, 4OUT | Comparator output (n-channel open-drain) | Each drives low when IN+ > IN−; requires external pull-up for logic-high assertion; supports shared-bus wired-AND logic. |
| 1IN+, 1IN−, 2IN+, 2IN−, 3IN+, 3IN−, 4IN+, 4IN− | Differential input pairs | Eight dedicated inputs - each pair serves one comparator; common-mode range includes ground and extends to VDD–1.5 V. |
| VDD | Positive supply | Single or dual-supply positive rail; accepts 4–16 V; powers all four comparators and internal ESD protection network. |
| GND | Ground reference | Return path for supply and input signals; pin 10 is GND; pin 12 is backside connection (not signal ground). |
Key Features
| Feature | Design Value |
|---|---|
| LinCMOS™ process technology | Enables ultra-low input bias current (5 pA typ) and high input impedance (>10¹² Ω), critical for sensor front-end accuracy. |
| Wide supply range (4–16 V) | Eliminates need for dedicated voltage regulators in mixed-voltage systems; supports direct interface with 5 V, 12 V, and 15 V rails. |
| Pin-compatible with LM339 | Enables drop-in upgrade path to lower power, higher precision, and extended temperature performance without PCB redesign. |
| Military temperature qualification | Rated –55°C to +125°C per MIL-PRF-38535, with tested parametric stability across full range - essential for mission-critical deployments. |
| Built-in ESD protection (1000 V HBM) | Reduces need for external TVS diodes in ruggedized designs; protects against handling-induced gate oxide stress during assembly. |
Applications
| Avionics Power Monitoring | Industrial Motor Overcurrent Detection |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage and auxiliary rail thresholds in flight control computers. IC Role / Device Role / Timing Role: Quadruple comparator performs simultaneous undervoltage lockout, overvoltage shutdown, battery charge status, and backup supply validation. Use Value: 5 mV offset tolerance ensures ±0.5% threshold accuracy at 28 V; open-drain outputs interface directly with 28 V pull-ups for fail-safe fault signaling. |
Use Scenario: Detecting phase-current imbalances and winding overtemperature in three-phase servo motor drives. IC Role / Device Role / Timing Role: Compares isolated current-sense amplifier outputs against programmable thresholds; triggers immediate PWM disable via wired-AND fault bus. Use Value: 200 ns response time enables sub-microsecond trip response; –55°C to +125°C rating sustains operation inside enclosed motor control cabinets. |
| Downhole Oilfield Instrumentation | Ruggedized Data Acquisition Front-End |
Use Scenario: Threshold detection of pressure transducer outputs and battery voltage in high-temperature logging tools deployed at 175°C ambient. IC Role / Device Role / Timing Role: Four comparators condition analog sensor outputs before digitization; one channel monitors battery health while others validate sensor integrity. Use Value: 5 pA input bias prevents drift in high-Z Wheatstone bridge interfaces; ceramic FK package withstands thermal cycling and mechanical shock. |
Use Scenario: Signal conditioning and event-triggering in portable environmental monitoring units exposed to wide outdoor temperature swings. IC Role / Device Role / Timing Role: Detects exceedance of PM2.5, CO₂, and humidity thresholds; generates interrupt signals to microcontroller via open-drain wired-AND bus. Use Value: Single 5 V supply simplifies power architecture; rail-to-rail input range accommodates unbuffered sensor outputs without level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339J | BJT-based; 2 mV max VIO at 25°C but 500 nA IIB; slower 1.3 µs response; rated –55°C to +125°C in CDIP. | Higher power consumption (2.5 mA vs 0.6 mA); less suitable for high-impedance sensor interfaces due to input current. | Select LM339J only if legacy BJT performance or exact CDIP-14 footprint is required; not recommended for low-power or precision sensing. |
| TLC374MJ | Same LinCMOS™ core, identical specs, but in 14-pin CDIP (J) package; shares same –55°C to +125°C rating and 5 mV VIO. | Through-hole mounting; larger footprint; lower thermal resistance than FK but no hermetic seal. | TLC374MJ offers identical electrical performance with easier manual prototyping; choose TLC374MFKB for hermetic reliability and surface-mount density. |
Compared with LM339J, TLC374MFKB reduces input bias current by 10⁵× and cuts response time by 99%, enabling precision low-power sensing; versus TLC374MJ, it trades through-hole ease for hermetic LCCC robustness and smaller PCB area.
Availability
TLC374MFKB is available at Aetrix Electronics and suitable for avionics power sequencing, downhole instrumentation, industrial motor protection, and ruggedized data acquisition requiring stable component supply across extended temperature extremes.
Supply support for TLC374MFKB 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 high-reliability components, with decades of heritage in space-qualified and military-grade IC design.
The TLC374MFKB belongs to TI's LinCMOS™ comparator family, engineered for precision analog threshold detection in harsh environments where low input current, wide supply range, and extended temperature stability are mandatory.
FAQ
What is the maximum supply voltage for the TLC374MFKB?
The TLC374MFKB supports an absolute maximum supply voltage of 18 V, but its recommended operating range is 4 V to 16 V. Operation at 18 V is limited to short-duration transients per absolute maximum ratings; sustained use above 16 V risks parametric degradation or permanent damage. The TLC374MFKB must be operated within 4–16 V for guaranteed specification compliance across –55°C to +125°C.
Does the TLC374MFKB require external pull-up resistors on its outputs?
Yes, the TLC374MFKB features n-channel open-drain outputs and requires external pull-up resistors to define the logic-high voltage level. Pull-up values typically range from 1 kΩ to 10 kΩ depending on speed and load; the device supports pull-up to any voltage ≤18 V, enabling interoperability with 3.3 V, 5 V, or 12 V logic families. Without pull-ups, outputs remain floating and cannot assert HIGH states.
Is the TLC374MFKB pin-compatible with standard LM339 packages?
No - the TLC374MFKB uses a 20-pin LCCC (FK) package, whereas the LM339 is offered in 14-pin DIP, SOIC, or TSSOP packages. While electrically functionally equivalent to LM339 in comparator behavior and pin assignment per channel, the TLC374MFKB's FK package has different pin count, layout, and thermal/mechanical characteristics. Direct PCB replacement requires layout revision; however, the TLC374MJ (14-pin CDIP) variant is pin-compatible with LM339J.
What is the input common-mode voltage range of the TLC374MFKB?
The TLC374MFKB supports a common-mode input voltage range from 0 V to VDD–1.5 V across its full operating temperature range (–55°C to +125°C). This includes ground-referenced inputs and allows direct interfacing with sensors whose outputs swing near 0 V. At VDD = 5 V, the usable range is 0 V to 3.5 V; at VDD = 12 V, it extends to 0 V to 10.5 V - enabling flexibility in single-supply system design.
How does the ESD protection in the TLC374MFKB differ from standard CMOS comparators?
The TLC374MFKB incorporates Texas Instruments' patented LinCMOS™ ESD protection circuit, which uses cascaded bipolar-MOS structures (Q1/Q2/D1–D3) to safely shunt ±1000 V HBM transients while minimizing post-ESD leakage. Unlike conventional diode-clamp protection that introduces nanoamp-level leakage, this design maintains <0.1 nA high-impedance integrity - preserving the 5 pA input bias current spec critical for precision applications. The TLC374MFKB is qualified to MIL-STD-883 Method 3015.7.
TLC374MFKB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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TLC374MFKB FAQ
1.How can I place an order for TLC374MFKB through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC374MFKB 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 TLC374MFKB reliable?
The price and inventory of TLC374MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC374MFKB is usually 5 days.
3.What payment methods are accepted for TLC374MFKB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC374MFKB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC374MFKB?
TLC374MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC374MFKB 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 TLC374MFKB?
For technical support, including TLC374MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC374MFKB requirements.
6.How does Aetrix verify that TLC374MFKB is sourced from the original manufacturer or authorized distributors?
All TLC374MFKB 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 TLC374MFKB meets industry standards.
7.What is the process for return or replacement of TLC374MFKB?
All TLC374MFKB units undergo pre-shipment inspection (PSI). If there is an issue with TLC374MFKB, 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 TLC374MFKB part is unused and in its original packaging.
Return procedure for TLC374MFKB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC374MFKB Tags
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