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Texas Instruments TLC374CD
- Part No.:
- TLC374CD
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC374CD.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,793
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Product details
Overview
TLC374CD 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 (TTL-level input step), 0.3 mA typical supply current at 5 V, and 5 pA typical input bias current. It operates from 0°C to 70°C and features n-channel open-drain outputs compatible with TTL, MOS, and CMOS logic in industrial voltage monitoring and threshold-detection circuits.
For engineers reviewing the TLC374CD datasheet, TLC374CD pinout, TLC374CD application, or TLC374CD equivalent, key selection considerations include its 14-pin SOIC (D) package, rail-to-rail common-mode input range down to ground, ultralow input bias current, and pin compatibility with LM339 in discrete comparator designs requiring high-impedance sensing.
Technical Context
The TLC374CD integrates four independent comparators on a single LinCMOS™ die, each with high-impedance inputs (>10¹² Ω) and ESD-protected n-channel open-drain outputs. Its architecture supports wired-AND logic via external pull-up resistors and tolerates input voltages beyond supply rails when current-limited to ±5 mA.
It operates over 3 V to 16 V recommended supply range with common-mode input voltage spanning 0 V to (VDD – 1.5 V), enabling direct interfacing with sensors and reference sources near ground. Input offset voltage is specified at ≤5 mV (max) at 25°C and ≤7 mV (max) over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 16 V - supports single-supply systems including 5 V and 12 V rails without level-shifting. |
| Input Bias Current | 5 pA typ - enables direct connection to high-impedance sources like photodiodes or precision voltage dividers. |
| Response Time | 200 ns typ (TTL-level step) - suitable for medium-speed window detection and overvoltage latch applications. |
| Input Offset Voltage | ≤5 mV max at 25°C - ensures reliable switching within ±5 mV of threshold under nominal conditions. |
| Output Type | N-channel open-drain - requires external pull-up; enables wired-AND logic and mixed-voltage interface (e.g., 5 V logic driving 3.3 V bus). |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded control and instrumentation environments. |
| ESD Rating | 1000 V HBM - internal protection reduces need for external TVS diodes in board-level ESD zones. |
Pinout & Package
Package: 14-pin SOIC (D), surface-mount, RoHS-compliant, NIPDAU lead finish, MSL Level-1 (260°C peak reflow).
| 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 threshold or signal for comparison with 1IN–. |
| 3 | 2IN– | Inverting input of comparator 2 - electrically isolated from other channels; supports independent thresholds. |
| 4 | 2IN+ | Non-inverting input of comparator 2 - used for dual-window or hysteresis configurations with external feedback. |
| 5 | 3IN– | Inverting input of comparator 3 - shares no internal connection with pins 12 or 13 per D-package top view. |
| 6 | 3IN+ | Non-inverting input of comparator 3 - supports multi-threshold monitoring (e.g., undervoltage, overvoltage, fault). |
| 7 | 4IN– | Inverting input of comparator 4 - fully independent; allows four simultaneous comparisons in compact layout. |
| 8 | GND | Ground reference for all comparators and internal circuitry - must be low-impedance return path. |
| 9 | 4IN+ | Non-inverting input of comparator 4 - enables quad-channel sensor interface (e.g., thermistor array, battery cell monitoring). |
| 10 | VDD | Positive supply rail - powers all four comparators; decoupling capacitor (0.1 µF) required adjacent to pin. |
| 11 | 4OUT | Open-drain output of comparator 4 - sinks current when active; requires external pull-up resistor (e.g., 10 kΩ to VDD). |
| 12 | 3OUT | Open-drain output of comparator 3 - compatible with TTL/MOS/CMOS logic families via appropriate pull-up voltage. |
| 13 | 2OUT | Open-drain output of comparator 2 - supports positive-logic wired-AND when tied together with other outputs. |
| 14 | 1OUT | Open-drain output of comparator 1 - primary output for first threshold; commonly used for system enable/disable signaling. |
Key Features
| Feature | Design Value |
|---|---|
| LinCMOS™ Process Technology | Enables ultra-low input bias current (5 pA typ) and high input impedance (>10¹² Ω), minimizing loading on sensitive analog sources. |
| Rail-to-Rail Common-Mode Range | Includes ground (0 V) up to (VDD – 1.5 V), allowing direct interface with unbuffered sensors and reference voltages near supply rails. |
| Internal ESD Protection | 1000-V human body model rating eliminates need for external ESD components in most industrial PCB layouts. |
| Pin Compatibility with LM339 | Same 14-pin SOIC footprint and functional pin mapping - enables drop-in replacement in legacy designs without layout change. |
| Low Supply Current | 300 µA typ (four comparators at 5 V) - extends battery life in portable instrumentation and low-power supervisory circuits. |
Applications
| Voltage Supervisor | Threshold Detector |
|---|---|
Use Scenario: Monitoring 12 V automotive supply for brownout and overvoltage events using resistor-divider networks. IC Role / Device Role / Timing Role: Quad comparator performs independent high/low threshold checks with hysteresis via feedback resistors. Use Value: Detects faults within 200 ns and asserts latched flags via open-drain outputs tied to microcontroller interrupt lines. |
Use Scenario: Converting analog sensor output (e.g., thermistor voltage) into digital presence/absence signals. IC Role / Device Role / Timing Role: Each comparator compares sensor voltage against fixed reference; outputs drive LEDs or logic gates. Use Value: Eliminates need for ADC and firmware polling; provides deterministic, low-latency decision-making at component level. |
| Power Sequencing Controller | Window Comparator |
Use Scenario: Ensuring correct power-up order of multiple DC rails (e.g., 5 V before 3.3 V) in FPGA or DSP systems. IC Role / Device Role / Timing Role: Dedicated comparator per rail monitors voltage ramp; outputs enable downstream regulators only when valid. Use Value: Prevents latch-up and damage by enforcing strict sequencing without software intervention or timing delays. |
Use Scenario: Validating that an analog signal remains within safe operational bounds (e.g., motor current < 10 A and > 0.5 A). IC Role / Device Role / Timing Role: Two comparators set upper/lower limits; third implements AND logic to assert "in-window" flag. Use Value: Provides real-time hardware-enforced safety envelope, independent of host processor availability or firmware state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher input bias current (250 nA typ), slower response (1.3 µs typ), wider temp range (–40°C to 85°C). | Less suitable for high-impedance sources or fast transient detection; better for cost-sensitive industrial controls. | Select LM339DR where budget constraints outweigh need for ultra-low bias current or speed. |
| TLC374IDR | Identical electrical specs but rated for –40°C to 85°C operating range; same SOIC-14 package and pinout. | Required for extended-temperature applications such as outdoor equipment or automotive under-hood modules. | Choose TLC374IDR when ambient temperature exceeds 70°C or long-term reliability at temperature extremes is critical. |
Compared with LM339DR and TLC374IDR, the TLC374CD offers optimal balance of speed, input impedance, and commercial-temperature performance in space-constrained SOIC-14 layouts - making it ideal for cost-sensitive yet performance-aware embedded supervisors where 0°C to 70°C operation suffices.
Availability
TLC374CD is available at Aetrix Electronics and suitable for voltage supervision, threshold detection, power sequencing, and window-comparator applications requiring stable component supply and long-term obsolescence management.
Supply support for TLC374CD 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 connectivity technologies with over 50 years of innovation in precision analog ICs.
The TLC374CD belongs to TI's LinCMOS™ comparator family, engineered for high-input-impedance, low-power, and rail-to-rail-capable voltage comparison in commercial-grade instrumentation and control systems.
FAQ
What is the maximum supply voltage for the TLC374CD?
The absolute maximum supply voltage for the TLC374CD is 18 V, but the recommended operating range is 3 V to 16 V. Operation above 16 V risks parametric degradation or reliability loss, even if within absolute ratings. The TLC374CD is optimized for stable performance at 5 V and 12 V rails, and its internal protection circuitry is validated for 1000-V HBM ESD stress under these conditions.
Does the TLC374CD support dual-supply operation?
Yes, the TLC374CD supports dual-supply operation provided the difference between the positive and negative supplies is maintained between 2 V and 18 V. For example, ±5 V (10 V total) or +12 V/–3 V (15 V total) configurations are valid. However, the device has no dedicated negative supply pin - GND serves as the reference node, so dual-supply use requires careful grounding and level translation of input signals relative to GND.
Are the outputs of the TLC374CD push-pull or open-drain?
The TLC374CD features n-channel open-drain outputs on all four channels. This means each output can only sink current to GND and requires an external pull-up resistor to establish a defined high state. This architecture enables wired-AND logic, mixed-voltage interfacing (e.g., 5 V output driving a 3.3 V bus), and simplified OR-ing of multiple comparator outputs - a key design feature confirmed in the TLC374CD datasheet Figure 1 schematic and electrical characteristics table.
Is the TLC374CD pin-compatible with the LM339?
Yes, the TLC374CD is pin-compatible with the LM339 in the 14-pin SOIC (D) package. Both devices share identical pin assignments for inputs, outputs, VDD, and GND, and both feature open-drain outputs. This allows direct substitution in existing LM339-based designs without PCB modification, though designers should verify that the TLC374CD's lower input bias current (5 pA vs. 250 nA) and faster response (200 ns vs. 1.3 µs) meet system timing and accuracy requirements.
What is the input common-mode voltage range of the TLC374CD?
The TLC374CD supports a common-mode input voltage range from 0 V to (VDD – 1.5 V) over its full operating temperature range (0°C to 70°C). At VDD = 5 V, this spans 0 V to 3.5 V; at VDD = 12 V, it covers 0 V to 10.5 V. This rail-to-ground capability enables direct interfacing with sensors, reference voltages, and microcontroller DAC outputs without level-shifting circuitry - a confirmed specification in the "Recommended Operating Conditions" table of the TLC374CD datasheet.
TLC374CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- LinCMOS™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- Surface Mount
- :
- 14-SOIC
TLC374CD FAQ
1.How can I place an order for TLC374CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC374CD 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 TLC374CD reliable?
The price and inventory of TLC374CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC374CD is usually 5 days.
3.What payment methods are accepted for TLC374CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC374CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC374CD?
TLC374CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC374CD 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 TLC374CD?
For technical support, including TLC374CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC374CD requirements.
6.How does Aetrix verify that TLC374CD is sourced from the original manufacturer or authorized distributors?
All TLC374CD 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 TLC374CD meets industry standards.
7.What is the process for return or replacement of TLC374CD?
All TLC374CD units undergo pre-shipment inspection (PSI). If there is an issue with TLC374CD, 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 TLC374CD part is unused and in its original packaging.
Return procedure for TLC374CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC374CD Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM239DR
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NCX2200GMAZ
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