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Texas Instruments TLC372QD
- Part No.:
- TLC372QD
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC372QD.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
TLC372QD 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 200 ns typical response time at 5V, 150 µA supply current per channel, and 5 pA typical input bias current - enabling high-impedance sensor interfacing in automotive power monitoring and industrial control applications.
For engineers reviewing the TLC372QD datasheet, TLC372QD pinout, TLC372QD application, or TLC372QD equivalent, key selection considerations include its −40°C to 125°C operating range, rail-to-rail common-mode input (down to ground), TTL/MOS/CMOS-compatible open-drain outputs, and pin compatibility with LM393 in D-package configurations.
Technical Context
The TLC372QD integrates two independent CMOS differential-pair comparators with ultra-high input impedance (>10¹² Ω) and low offset voltage (1–5 mV max). Its open-drain output stage allows external pull-up to voltages up to 16 V, independent of VDD, supporting level translation and wired-AND logic.
It operates across 3 V to 16 V supply range with guaranteed performance over −40°C to 125°C, and features built-in ESD protection rated at 1000 V (HBM). Input common-mode range extends to VDD − 1.5 V, and differential input voltage tolerance is ±18 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 16 V - supports direct interface with 3.3 V, 5 V, and 12 V systems without level shifters |
| Response Time | 200 ns typical - enables fast edge detection in motor control commutation and overvoltage shutdown circuits |
| Input Bias Current | 5 pA typical - preserves signal integrity when sensing from high-impedance sources like thermistors or photodiodes |
| Input Offset Voltage | 1–5 mV max - ensures accurate threshold triggering in precision window comparators |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive and industrial ambient environments |
| Output Type | Open-drain N-channel - permits flexible logic-level translation and multi-comparator wired-AND outputs |
| ESD Rating | 1000 V HBM - provides baseline handling robustness during PCB assembly and system integration |
Pinout & Package
Package: SOIC-8 (D package), 8-pin small-outline integrated circuit with standard JEDEC outline and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Open-drain output of Comparator A - requires external pull-up resistor for logic HIGH |
| 2 | IN− A | Inverting input of Comparator A - accepts signals down to ground in single-supply operation |
| 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 connection |
| 5 | IN+ B | Non-inverting input of Comparator B - electrically isolated from Channel 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 3 V to 16 V DC |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous high/low threshold detection (e.g., window comparator) without inter-channel crosstalk |
| Single- or dual-supply operation | Eliminates need for negative rail in sensor monitoring - GND serves as V− in single-supply mode |
| Rail-to-rail common-mode input | Accepts input signals from ground to VDD − 1.5 V - simplifies interface with unbuffered sensors and DACs |
| Low 150 µA supply current | Reduces quiescent power in battery-backed systems - ~75 µA per comparator at 5 V |
| Pin-compatible with LM393 | Allows drop-in replacement in legacy designs using D-package SOIC-8 footprint |
Applications
| Overvoltage Protection Circuit | Temperature Threshold Monitor |
|---|---|
Use Scenario: Detecting excessive bus voltage in 12 V automotive ECUs before MOSFET gate drivers activate. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel triggers at 13.8 V (OV), second at 10.5 V (UV). Use Value: Prevents downstream component damage by asserting fault signal within 200 ns of overvoltage event. | Use Scenario: Monitoring coolant temperature in engine control units using NTC thermistor divider network. IC Role / Device Role / Timing Role: Comparator A compares thermistor voltage against 2.5 V reference; Comparator B adds hysteresis via feedback resistor. Use Value: 5 pA input bias avoids loading thermistor network, preserving accuracy of <±1°C measurement. |
| Power Sequencing Supervisor | Zero-Crossing Detector |
Use Scenario: Validating correct startup order of multiple rails (3.3 V, 5 V, 12 V) in industrial PLC backplanes. IC Role / Device Role / Timing Role: Each comparator monitors one rail against dedicated reference; outputs feed AND gate for enable signal. Use Value: −40°C to 125°C rating ensures reliable sequencing across full industrial temperature range. | Use Scenario: Converting AC line voltage to clean digital zero-crossing pulses for TRIAC phase control in smart lighting. IC Role / Device Role / Timing Role: One comparator channel compares rectified AC waveform to ground-referenced threshold. Use Value: Open-drain output pulls up to 12 V logic rail while powered from 5 V supply - eliminates level shifter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Bipolar input stage; higher 250 µA supply current; 2 mV offset; −40°C to 85°C rating | Limited to commercial/industrial ambient; less suitable for high-impedance sources due to 25 nA bias current | Choose LM393DR only if cost sensitivity outweighs temperature and input impedance requirements. |
| TLC372CDR | Same architecture and pinout; rated for 0°C to 70°C only; lower ESD rating (500 V HBM) | Not qualified for automotive under-hood or extended-temperature industrial use | Select TLC372CDR only for cost-sensitive consumer applications with controlled ambient conditions. |
Compared with LM393DR and TLC372CDR, the TLC372QD uniquely combines military-grade temperature range (−40°C to 125°C), CMOS input performance (5 pA bias), and production-ready automotive qualification - making it the sole option among the three for AEC-Q100-aligned designs requiring long-term reliability at elevated junction temperatures.
Availability
TLC372QD is available at Aetrix Electronics and suitable for automotive power supervision, industrial sensor interfaces, and embedded system reset management requiring stable component supply across extended temperature ranges.
Supply support for TLC372QD 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 experience in high-reliability analog IC design.
The TLC372 product line delivers precision, low-power dual comparators optimized for automotive, industrial, and instrumentation applications where input impedance, temperature stability, and supply flexibility are critical.
FAQ
What is the maximum supply voltage for the TLC372QD?
The TLC372QD supports an absolute maximum supply voltage of 18 V, with recommended operation between 3 V and 16 V. Exceeding 18 V risks permanent damage per the Absolute Maximum Ratings table. At 16 V, the device maintains full functionality including 200 ns response time and 5 pA input bias current - verified across the −40°C to 125°C temperature range specified for the TLC372QD.
Does the TLC372QD have internal hysteresis?
No, the TLC372QD does not include internal hysteresis. It relies on external positive feedback networks (e.g., resistor dividers) to implement hysteresis for noise immunity - as detailed in Section 7.4.5 of the official datasheet. This design allows users to tailor hysteresis magnitude precisely to their application's noise profile and threshold stability requirements, avoiding fixed internal values that may be too large or too small.
Can the TLC372QD outputs drive a 10 kΩ pull-up to 15 V while powered from 5 V?
Yes, the TLC372QD open-drain outputs can sink current with a 10 kΩ pull-up to 15 V while operating from a 5 V VDD supply. The output FET is rated for 16 V drain-source voltage, and the datasheet confirms compatibility with TTL, MOS, and CMOS logic levels. At IOL = 4 mA, VOL remains ≤400 mV across temperature - ensuring clean LOW-state signaling even with this mixed-voltage configuration.
Is the TLC372QD pin-compatible with the LM393 in SOIC-8 packages?
Yes, the TLC372QD in the D (SOIC-8) package is pin-compatible with the LM393DR and LM393N in equivalent SOIC-8 footprints. Pin assignments for IN+, IN−, OUT, VDD, and GND match exactly - enabling direct PCB replacement in existing layouts. However, note that the TLC372QD's CMOS inputs require no base-current compensation resistors, unlike the bipolar LM393, simplifying external network design.
What is the input common-mode voltage range for the TLC372QD at 12 V supply?
At VDD = 12 V, the TLC372QD supports a common-mode input voltage range of 0 V to 10.5 V (VDD − 1.5 V) across its full −40°C to 125°C operating range. This includes ground-referenced signals and allows direct interface with most 0–10 V industrial sensors and DAC outputs without level-shifting circuitry - a key advantage over comparators with narrower input ranges.
TLC372QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- LinCMOS™
- Packaging:
- Tube
- 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
TLC372QD FAQ
1.How can I place an order for TLC372QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC372QD 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 TLC372QD reliable?
The price and inventory of TLC372QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC372QD is usually 5 days.
3.What payment methods are accepted for TLC372QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC372QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC372QD?
TLC372QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC372QD 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 TLC372QD?
For technical support, including TLC372QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC372QD requirements.
6.How does Aetrix verify that TLC372QD is sourced from the original manufacturer or authorized distributors?
All TLC372QD 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 TLC372QD meets industry standards.
7.What is the process for return or replacement of TLC372QD?
All TLC372QD units undergo pre-shipment inspection (PSI). If there is an issue with TLC372QD, 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 TLC372QD part is unused and in its original packaging.
Return procedure for TLC372QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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