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Texas Instruments TLC374CN-A
- Part No.:
- TLC374CN-A
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC374CN-A.pdf
- Description:
- IC COMPARATOR 4 DIFF 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:522
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Product details
Overview
TLC374CN-A from Texas Instruments is a LinCMOS™ quadruple differential comparator IC designed for single- or dual-supply operation across 2 V to 18 V. It delivers 200 ns typical response time at TTL-level input steps, 5 pA typical input bias current, and 0.3 mA typical supply current at 5 V - enabling precision voltage monitoring in industrial control, power supply sequencing, and threshold-detection circuits.
For engineers reviewing the TLC374CN-A datasheet, TLC374CN-A pinout, TLC374CN-A application, or TLC374CN-A equivalent, this page provides verified package mapping (14-pin PDIP), confirmed open-drain n-channel outputs, validated input offset voltage ≤5 mV at 25°C, and real-world design implications of its rail-to-rail common-mode range and ESD-hardened LinCMOS process.
Technical Context
The TLC374CN-A integrates four independent comparators on a single die using Texas Instruments' LinCMOS™ polysilicon-gate CMOS process, enabling ultra-high input impedance (>10¹² Ω) and sub-picoampere input bias current. Each channel features an open-drain n-channel output stage compatible with TTL, MOS, and CMOS logic families.
It supports single-supply operation from 2 V to 18 V or dual supplies with total differential voltage within that range. The input common-mode range includes ground and extends to VDD–1 V at 25°C, and its internal ESD protection meets 1000-V HBM rating without compromising input leakage performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 18 V - enables direct use in 3.3 V, 5 V, and 12 V systems without level-shifting. |
| Input Bias Current | 5 pA typ - allows interfacing with high-impedance sensors (e.g., photodiodes, thermistors) without loading error. |
| Response Time | 200 ns typ (TTL-level step) - supports fast edge detection in motor control feedback or overvoltage latch circuits. |
| Input Offset Voltage | ≤5 mV max at 25°C - ensures reliable 10-mV threshold discrimination in precision window comparators. |
| Output Configuration | Open-drain n-channel - permits wired-AND logic, level translation, and flexible pull-up selection (e.g., to 3.3 V or 15 V). |
| ESD Rating | 1000 V HBM - reduces handling sensitivity during PCB assembly while maintaining parametric stability. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded instrumentation and consumer electronics applications. |
Pinout & Package
Package: 14-pin plastic DIP (PDIP-N), through-hole mount, RoHS-compliant NIPDAU lead finish, no moisture sensitivity rating (MSL N/A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of Comparator 1 - referenced against 1IN+ to determine output state. |
| 2 | 1IN+ | Non-inverting input of Comparator 1 - accepts analog threshold or signal for comparison. |
| 3 | 2IN– | Inverting input of Comparator 2 - electrically isolated from other channels; supports independent sensing paths. |
| 4 | 2IN+ | Non-inverting input of Comparator 2 - usable for dual-threshold or hysteresis configuration with external feedback. |
| 5 | 3IN– | Inverting input of Comparator 3 - shares no internal connection with pins 6–14 except GND and VDD rails. |
| 6 | 3IN+ | Non-inverting input of Comparator 3 - enables three independent voltage windows in one package. |
| 7 | 4IN– | Inverting input of Comparator 4 - fully decoupled; suitable for redundant or fault-monitoring functions. |
| 8 | GND | Ground reference for all comparators and internal circuitry - must be low-impedance for stable offset performance. |
| 9 | 4IN+ | Non-inverting input of Comparator 4 - completes quad-channel input set; supports 4-way parallel decision logic. |
| 10 | VDD | Positive supply rail - powers all four comparators; bypass capacitor (0.1 µF) recommended near pin. |
| 11 | 4OUT | Open-drain output of Comparator 4 - requires external pull-up; sinks up to 16 mA at VOL = 1.5 V. |
| 12 | 3OUT | Open-drain output of Comparator 3 - compatible with 3.3 V/5 V/15 V logic families via pull-up selection. |
| 13 | 2OUT | Open-drain output of Comparator 2 - supports positive-logic wired-AND when tied together with other OUT pins. |
| 14 | 1OUT | Open-drain output of Comparator 1 - primary output for first threshold; default sink path for load switching. |
Key Features
| Feature | Design Value |
|---|---|
| LinCMOS™ Process Technology | Enables >10¹² Ω input impedance and 5 pA input bias current - critical for high-Z sensor interfaces without signal degradation. |
| Rail-to-Rail Input Common-Mode Range | Includes ground and extends to VDD–1 V - allows direct sensing of signals near 0 V (e.g., current-sense amplifiers, battery monitors). |
| Fast TTL-Compatible Response | 200 ns typical propagation delay - supports real-time overcurrent detection in DC-DC converters and motor drivers. |
| Internal ESD Protection | 1000-V HBM rating with patented shunt architecture - eliminates need for external TVS diodes in board-level ESD zones. |
| Pin Compatibility with LM339 | Same 14-pin PDIP footprint and functional pinout - enables drop-in replacement in legacy designs without layout change. |
Applications
| Industrial Power Sequencing | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Monitoring startup order of multiple DC rails (e.g., 12 V, 5 V, 3.3 V) in programmable logic controllers. IC Role / Device Role / Timing Role: TLC374CN-A acts as four independent voltage supervisors, each comparing a rail against a precision reference to assert enable signals only after valid thresholds are met. Use Value: Prevents latch-up or damage from out-of-sequence power application; eliminates need for discrete op-amp + transistor solutions. |
Use Scenario: Detecting transient overvoltage events (>15 V) on a 12 V automotive accessory bus. IC Role / Device Role / Timing Role: TLC374CN-A Channel 1 compares bus voltage against a 15 V Zener-derived reference; output triggers SCR crowbar or MOSFET shutdown. Use Value: 200 ns response ensures clamping before downstream ICs experience stress; open-drain output directly drives gate of protection FET. |
| Temperature Threshold Alarm | Optical Smoke Detector Signal Conditioning |
Use Scenario: Detecting exceedance of 70°C in HVAC heat exchangers using a thermistor voltage divider. IC Role / Device Role / Timing Role: TLC374CN-A Channel 2 compares thermistor network output to fixed reference; output toggles LED and microcontroller interrupt. Use Value: 5 pA input bias avoids thermistor self-heating error; rail-to-rail input accommodates full 0–5 V sensor swing. |
Use Scenario: Converting weak, noisy photodiode current from smoke chamber into clean digital pulse for microcontroller sampling. IC Role / Device Role / Timing Role: TLC374CN-A Channel 3 and 4 form a window comparator detecting light-scatter pulses above ambient noise floor and below saturation. Use Value: Ultra-low input current preserves transimpedance amplifier gain accuracy; 5 mV offset ensures <1% false-alarm margin at 1 V reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N | Higher input offset (7 mV max), 250 ns response, bipolar process - 2× higher supply current (0.8 mA typ at 5 V). | Less suitable for battery-powered or low-offset precision apps; acceptable where cost is primary constraint. | Select LM339N only if legacy design reuse or BOM consolidation outweighs offset and speed requirements. |
| TLC374IN | Identical electrical specs but rated for –40°C to 85°C industrial temperature range; same PDIP-14 package and pinout. | Required for outdoor, automotive under-hood, or extended-temperature industrial deployments. | Choose TLC374IN when operating ambient exceeds 70°C - no circuit redesign needed. |
Compared with LM339N, TLC374CN-A offers lower offset, faster response, and 60% lower quiescent current; versus TLC374IN, it trades extended temperature capability for lower cost in commercial-grade applications.
Availability
TLC374CN-A is available at Aetrix Electronics and suitable for industrial power sequencing, overvoltage protection circuits, and temperature threshold alarm systems requiring stable component supply and long-term obsolescence management.
Supply support for TLC374CN-A 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 founded in 1930, specializing in analog, embedded processing, and connectivity technologies with broad industrial, automotive, and consumer reach.
The TLC374 family belongs to TI's LinCMOS™ precision comparator product line, engineered specifically for low-power, high-input-impedance voltage comparison in resource-constrained and noise-sensitive applications.
FAQ
What is the maximum supply voltage for the TLC374CN-A?
The TLC374CN-A supports an absolute maximum supply voltage of 18 V, with recommended operation from 2 V to 16 V per the datasheet. Operating beyond 16 V risks exceeding safe dissipation limits and may degrade long-term reliability, especially at elevated temperatures. Always observe derating curves in the Dissipation Rating Table for continuous operation above 25°C ambient.
Does the TLC374CN-A have internal hysteresis?
No, the TLC374CN-A does not include internal hysteresis. Each comparator channel is a basic differential pair with open-drain output, requiring external positive feedback (e.g., resistor from OUT to IN+) to implement user-defined hysteresis. This design allows full flexibility in setting threshold windows and noise immunity tailored to specific signal conditions.
Can the TLC374CN-A outputs drive LEDs directly?
Yes, the TLC374CN-A open-drain outputs can sink up to 16 mA per channel at VOL = 1.5 V, sufficient to drive standard indicator LEDs with appropriate series current-limiting resistors. For example, with a 5 V supply and 2 mA LED current, a 1.8 kΩ pull-up resistor ensures reliable turn-on while staying within IOL specifications.
Is the TLC374CN-A pin-compatible with the LM339?
Yes, the TLC374CN-A is pin-compatible with the LM339 in the 14-pin PDIP package: both share identical pin assignments for inputs (1–4, 5–8), outputs (13–10), VDD (10), and GND (8). This allows direct substitution in existing LM339 layouts without PCB modification, though designers should verify timing and offset margins meet updated system requirements.
What is the input common-mode voltage range of the TLC374CN-A?
The TLC374CN-A supports a common-mode input voltage range from 0 V (ground) to VDD–1 V at 25°C, and to VDD–1.5 V across its full 0°C to 70°C operating range. This rail-to-ground capability enables direct interface with sensors whose outputs swing near 0 V - such as current-sense amplifiers or thermocouple conditioning circuits - without level-shifting circuitry.
TLC374CN-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- LinCMOS™
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Differential
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Drain, TTL
- Voltage - Supply, Single/Dual (±):
- 3V ~ 16V, ±1.5V ~ 8V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 5pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 800µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
TLC374CN-A FAQ
1.How can I place an order for TLC374CN-A through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC374CN-A 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 TLC374CN-A reliable?
The price and inventory of TLC374CN-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC374CN-A is usually 5 days.
3.What payment methods are accepted for TLC374CN-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC374CN-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC374CN-A?
TLC374CN-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC374CN-A 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 TLC374CN-A?
For technical support, including TLC374CN-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC374CN-A requirements.
6.How does Aetrix verify that TLC374CN-A is sourced from the original manufacturer or authorized distributors?
All TLC374CN-A 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 TLC374CN-A meets industry standards.
7.What is the process for return or replacement of TLC374CN-A?
All TLC374CN-A units undergo pre-shipment inspection (PSI). If there is an issue with TLC374CN-A, 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 TLC374CN-A part is unused and in its original packaging.
Return procedure for TLC374CN-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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