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Texas Instruments TLC372QDG4
- Part No.:
- TLC372QDG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC372QDG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,811
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Product details
Overview
TLC372QDG4 from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for precision threshold detection in single- or dual-supply systems. It delivers 200ns typical response time at 5V, ultra-low 150µA supply current per device (300µA total), and 5pA typical input bias current - enabling high-impedance sensor interfacing in battery-powered industrial monitoring and automotive power-rail supervision.
For engineers reviewing the TLC372QDG4 datasheet, TLC372QDG4 pinout, TLC372QDG4 application, or TLC372QDG4 equivalent, key selection criteria include its −40°C to 125°C extended temperature rating, 3V–16V supply flexibility, TTL/MOS/CMOS output compatibility, and pin-for-pin equivalence with LM393 in SOIC-8 packaging.
Technical Context
The TLC372QDG4 integrates two independent CMOS differential comparators with rail-to-rail common-mode input range (including ground) and n-channel open-drain outputs capable of sinking up to 16mA per channel. Its architecture supports wired-AND logic and level translation across supply domains up to 16V, independent of VDD.
Each comparator features 10¹²Ω typical input impedance, 1mV typical input offset voltage (max 5mV over full temp), and built-in ESD protection rated at 1000V HBM - making it suitable for noisy industrial environments where high-precision, low-power analog signal conditioning is required without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4V to 16V - supports wide-input industrial rails and battery-backed systems without regulation |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and harsh-environment industrial control |
| Input Bias Current | 5pA typical - enables direct connection to high-impedance sources like thermistors or photodiodes |
| Response Time | 200ns typical (100mV overdrive, 5V supply) - sufficient for fast fault detection in power converters |
| Output Configuration | N-channel open-drain - allows flexible pull-up to external voltages up to 16V and wired-AND logic implementation |
| Input Offset Voltage | 1mV typical, ≤5mV max - ensures accurate threshold triggering in precision window-comparator circuits |
| Supply Current | 150µA typical per comparator (300µA total at 5V) - extends battery life in portable sensing nodes |
Pinout & Package
Package: SOIC-8 (D package), 150-mil body width, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Open-drain output of comparator A - requires external pull-up; sinks current when IN+ < IN− |
| 2 | IN− A | Inverting input of comparator A - accepts common-mode voltages from GND to VDD−1.5V |
| 3 | IN+ A | Non-inverting input of comparator A - high-impedance node for reference or sensor signal routing |
| 4 | GND | Ground reference for both comparators and internal circuitry - must be low-impedance return path |
| 5 | IN+ B | Non-inverting input of comparator B - electrically isolated from comparator A inputs |
| 6 | IN− B | Inverting input of comparator B - supports independent threshold configuration per channel |
| 7 | OUT B | Open-drain output of comparator B - compatible with shared pull-up bus for OR logic |
| 8 | VDD | Positive supply pin - powers both comparators; accepts 4V–16V DC |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables compact window-detection or redundant fault monitoring without external ICs |
| Single/dual-supply operation | Operates from 4V–16V single supply or ±1.5V to ±8V split supplies - simplifies system power architecture |
| Ultra-low input bias current (5pA) | Eliminates loading error on high-Z sources such as pH electrodes or piezoelectric sensors |
| ESD protection (1000V HBM) | Reduces need for external transient suppression in assembly-line handling and field-deployed units |
| Pin-compatible with LM393 | Allows drop-in replacement in legacy designs while upgrading to lower power and wider temperature range |
Applications
| Overvoltage/Undervoltage Detection | Threshold-Based Sensor Interface |
|---|---|
Use Scenario: Monitoring 24V PLC power rail for out-of-spec conditions in industrial automation cabinets. IC Role / Device Role / Timing Role: Dual comparator implements window detection: one channel triggers at 19.2V (UV), the other at 30V (OV). Use Value: Delivers fail-safe shutdown signaling with 200ns response and no false trips due to noise, enabled by 5pA bias current and hysteresis support. |
Use Scenario: Converting analog output from a thermistor-based temperature sensor into digital ON/OFF control for HVAC fan staging. IC Role / Device Role / Timing Role: Single comparator compares conditioned thermistor voltage against fixed 2.5V reference to generate clean logic-level output. Use Value: Maintains accuracy across −40°C to 125°C ambient with <5mV offset drift, eliminating calibration drift in unregulated enclosures. |
| Power Sequencing Supervisor | Logic-Level Translation Interface |
Use Scenario: Validating correct startup order of multiple DC/DC converter outputs in telecom base station power modules. IC Role / Device Role / Timing Role: Two comparators monitor separate voltage rails (e.g., 3.3V and 12V), asserting enable signals only when both are stable. Use Value: Open-drain outputs allow wired-AND combination into single system-reset line, reducing board real estate vs. discrete logic. |
Use Scenario: Interfacing 3.3V microcontroller GPIO to 5V or 12V peripheral control lines in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Comparator acts as bidirectional level shifter: 3.3V logic drives IN+, open-drain OUT pulls up to higher rail via external resistor. Use Value: Supports translation up to 16V with sub-200ns delay - faster than discrete MOSFET translators and immune to shoot-through. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 250µA supply current, 2mV offset max, −25°C to 85°C rating | Limited to commercial/industrial ambient; less suitable for under-hood automotive | Lower-cost option where extended temperature and ultra-low power are not required |
| TLC372CDR | Same electrical specs but rated 0°C to 70°C; identical SOIC-8 pinout and footprint | Not qualified for automotive or extended-temperature industrial use | Drop-in substitute for cost-sensitive consumer or lab equipment with benign thermal environments |
Compared with LM393DR and TLC372CDR, the TLC372QDG4 provides guaranteed operation to 125°C and 30% lower quiescent current - critical for thermally constrained automotive ECUs and long-life battery-powered IoT edge nodes where thermal derating and energy efficiency directly impact reliability and service interval.
Availability
TLC372QDG4 is available at Aetrix Electronics and suitable for automotive power-rail supervision, industrial PLC voltage monitoring, and battery-powered sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC372QDG4 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 expertise in precision analog IC design and automotive-grade qualification.
The TLC372QDG4 belongs to TI's precision comparator product line, engineered specifically for high-reliability industrial and automotive applications demanding extended temperature operation, low power, and robust ESD immunity without sacrificing speed or accuracy.
FAQ
What is the maximum supply voltage for TLC372QDG4?
The absolute maximum supply voltage for TLC372QDG4 is 18V, but the recommended operating range is 4V to 16V. Operation above 16V risks exceeding safe power dissipation limits and may degrade long-term reliability, especially at high ambient temperatures. The device is commonly used at 5V, 12V, or 15V in industrial and automotive systems where stable rail margins exist.
Does TLC372QDG4 support dual-supply operation?
Yes, TLC372QDG4 supports dual-supply operation with a minimum supply difference of 3V and maximum of 16V between V+ and V−. When configured with split supplies (e.g., ±5V), the common-mode input range remains referenced to V−, and the open-drain outputs sink to V− rather than ground. This mode is used in bipolar signal conditioning and legacy op-amp-style comparator circuits.
Can TLC372QDG4 drive a standard TTL load directly?
No - TLC372QDG4 has an open-drain output and cannot source current. To interface with TTL inputs, an external pull-up resistor to a TTL-compatible voltage (e.g., 5V) is required. With a 1kΩ pull-up, the output can sink ≥6mA while maintaining VOL ≤400mV, satisfying TTL LOW-level input requirements. The pull-up value must be selected based on rise-time and power constraints.
What is the input common-mode voltage range for TLC372QDG4?
The input common-mode voltage range for TLC372QDG4 is 0V to VDD−1.5V over the full −40°C to +125°C temperature range. At VDD = 5V, this spans 0V to 3.5V; at VDD = 12V, it spans 0V to 10.5V. This rail-to-rail capability - including ground - enables direct sensing of signals referenced to system ground without level-shifting circuitry.
Is TLC372QDG4 pin-compatible with LM393?
Yes, TLC372QDG4 is pin-compatible with LM393 in SOIC-8 (D) packaging: both share identical pin assignments for VDD, GND, IN+, IN−, and open-drain outputs. This allows direct PCB replacement in existing LM393 designs, delivering improved performance - including lower supply current (150µA vs. 250µA), tighter offset (1mV vs. 2mV typ), and extended temperature range (−40°C to 125°C vs. −25°C to 85°C).
TLC372QDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- LinCMOS™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Differential
- Number of Elements:
- 2
- Output Type:
- CMOS, MOS, Open-Drain, TTL
- Voltage - Supply, Single/Dual (±):
- 4V ~ 16V, ±2V ~ 8V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 5pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 300µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TLC372QDG4 FAQ
1.How can I place an order for TLC372QDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC372QDG4 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 TLC372QDG4 reliable?
The price and inventory of TLC372QDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC372QDG4 is usually 5 days.
3.What payment methods are accepted for TLC372QDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC372QDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC372QDG4?
TLC372QDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC372QDG4 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 TLC372QDG4?
For technical support, including TLC372QDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC372QDG4 requirements.
6.How does Aetrix verify that TLC372QDG4 is sourced from the original manufacturer or authorized distributors?
All TLC372QDG4 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 TLC372QDG4 meets industry standards.
7.What is the process for return or replacement of TLC372QDG4?
All TLC372QDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC372QDG4, 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 TLC372QDG4 part is unused and in its original packaging.
Return procedure for TLC372QDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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