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Texas Instruments TLC393QDR
- Part No.:
- TLC393QDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC393QDR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
TLC393QDR from Texas Instruments is a dual micropower voltage comparator with open-drain CMOS outputs, designed for automotive-grade single-supply operation (4 V to 16 V). It delivers 110 µW typical supply power at 5 V, 2.5 µs typical propagation delay (tPLH) with 5-mV overdrive, and operates across −40°C to +125°C - enabling use in engine control units and battery management systems.
For engineers reviewing the TLC393QDR datasheet, TLC393QDR pinout, TLC393QDR application, or TLC393QDR equivalent, key selection criteria include automotive temperature rating, ultra-low quiescent current, open-drain output compatibility with pull-up networks, and LinCMOS™ input stage stability under differential stress.
Technical Context
The TLC393QDR implements two independent comparators on a LinCMOS™ process, delivering high input impedance (>1012 Ω), sub-picoampere input bias current (5 pA typ at 25°C), and stable input offset voltage (≤10 mV over −40°C to 125°C). Its open-drain output stage supports wired-OR logic and level translation via external pull-up.
Unlike push-pull comparators, the TLC393QDR requires an external pull-up resistor for high-level output assertion; its low-level output voltage remains ≤400 mV at 6 mA (25°C), ensuring reliable TTL/CMOS interface across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 4 V to 16 V - supports direct connection to automotive 12-V battery rails with transient tolerance. |
| Quiescent supply current | 22–40 µA (25°C), ≤90 µA (−40°C to 125°C) - enables always-on monitoring without draining vehicle battery. |
| Propagation delay (tPLH) | 2.5 µs typ at 5 V, 5-mV overdrive - sufficient for motor phase detection and supply fault response in real-time control loops. |
| Input offset voltage | ≤10 mV over full temperature range - ensures accurate threshold detection in sensor signal conditioning without calibration. |
| Common-mode input range | 0 V to VDD − 1.5 V - accommodates rail-to-rail sensing of analog signals referenced to system ground or mid-supply. |
| Output type | Open-drain CMOS - allows flexible interfacing to 3.3-V, 5-V, or 12-V logic domains using external pull-up resistors. |
| ESD protection | On-chip ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.2) - enhances robustness in noisy automotive environments. |
Pinout & Package
Package: SOIC-8 (D package), tape-and-reel (R suffix), RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-drain output of Comparator 1 - requires external pull-up; sinks up to 20 mA. |
| 2 | IN1− | Inverting input of Comparator 1 - high-impedance node; bias current ≤30 nA at 125°C. |
| 3 | IN1+ | Non-inverting input of Comparator 1 - accepts common-mode voltages up to VDD − 1.5 V. |
| 4 | GND | Analog/digital ground reference - must be low-impedance path to minimize noise coupling. |
| 5 | VDD | Positive supply rail - decoupling capacitor (0.1 µF) required adjacent to pin per datasheet recommendation. |
| 6 | OUT2 | Open-drain output of Comparator 2 - independently configurable; shares same VDD/GND. |
| 7 | IN2− | Inverting input of Comparator 2 - electrically isolated from IN1−; supports dual independent thresholds. |
| 8 | IN2+ | Non-inverting input of Comparator 2 - enables simultaneous monitoring of two distinct analog signals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent monitoring of two separate analog inputs (e.g., battery voltage and temperature) without cross-talk. |
| LinCMOS™ input stage | Delivers <1 pA input bias current at 25°C and stable offset voltage even under ±18-V differential input stress. |
| Automotive temperature range | Rated for −40°C to +125°C operation - qualified for under-hood applications per AEC-Q100 stress test requirements. |
| Ultra-low power consumption | 22 µA typical supply current per comparator pair - extends runtime in always-on vehicle subsystems like intrusion detection. |
| ESD-protected inputs | Withstands 2000 V HBM - reduces need for external TVS diodes in cost-sensitive automotive modules. |
Applications
| Engine Control Unit (ECU) Sensor Monitoring | Battery Management System (BMS) |
|---|---|
Use Scenario: Detecting throttle position sensor (TPS) signal deviation beyond calibrated window during engine cranking. IC Role / Device Role / Timing Role: Dual comparator compares TPS output against upper/lower reference thresholds; open-drain outputs drive microcontroller interrupt lines. Use Value: 2.5 µs response time ensures fault detection within one engine cycle; 110 µW power draw avoids loading 5-V sensor supply rail. | Use Scenario: Monitoring cell voltage imbalance in 12S Li-ion packs to trigger balancing activation. IC Role / Device Role / Timing Role: One comparator detects overvoltage per cell string; second monitors undervoltage - both feed safety controller via wired-OR logic. Use Value: Input offset ≤10 mV guarantees ±5 mV detection accuracy across full temperature range; open-drain outputs simplify isolation interface. |
| Automotive Lighting Control | Power Supply Supervision |
Use Scenario: Adaptive headlight leveling using MEMS accelerometer output to enable/disable actuator based on vehicle pitch angle. IC Role / Device Role / Timing Role: Comparator compares conditioned accelerometer signal to programmable threshold; output drives MOSFET gate driver. Use Value: Common-mode input range to VDD − 1.5 V allows direct interface to ratiometric sensors powered from same 5-V rail. | Use Scenario: Early warning of 12-V main supply sag before brownout resets microcontroller. IC Role / Device Role / Timing Role: Comparator monitors divided 12-V rail against precision reference; output asserts early-fail interrupt prior to reset threshold. Use Value: 4-V minimum supply enables operation during cold-crank events; 90 µA max IDD ensures minimal impact on backup supply hold-up time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393QDR | Higher quiescent current (500 µA typ), wider input offset (±7 mV), no LinCMOS™ input stage - lower input impedance and higher bias current. | Not suitable for ultra-low-power always-on monitoring; less stable under differential input stress. | Select LM393QDR only when legacy design compatibility or cost sensitivity outweighs micropower and precision requirements. |
| TLC3702CDR | Push-pull output (no external pull-up needed), faster propagation (1.5 µs typ), but higher supply current (120 µA typ) and narrower temp range (0°C to 70°C). | Preferred for board space-constrained designs where pull-up resistors are undesirable, but not for automotive under-hood use. | Choose TLC3702CDR for commercial-grade applications requiring faster response and simplified layout - not for extended temperature or ultra-low-power needs. |
Compared with LM393QDR and TLC3702CDR, the TLC393QDR uniquely balances automotive temperature rating, micropower operation (<40 µA), and LinCMOS™ input stability - making it optimal for battery-sensitive, high-reliability vehicle subsystems where both precision and ruggedness are mandatory.
Availability
TLC393QDR is available at Aetrix Electronics and suitable for automotive engine control, battery management, lighting control, and power supervision applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC393QDR 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 digital signal processing technologies with over 50 years of automotive-grade component development.
The TLC393QDR belongs to TI's LinCMOS™ comparator family, engineered specifically for ultra-low-power, high-precision analog threshold detection in harsh automotive and industrial environments.
FAQ
What is the maximum operating temperature range for the TLC393QDR?
The TLC393QDR is characterized for continuous operation from −40°C to +125°C, meeting automotive under-hood thermal requirements. This full-range specification is confirmed in the "recommended operating conditions" table of the SLCS115E datasheet, and distinguishes it from commercial (TLC393CDR) and industrial (TLC393IDR) variants.
Does the TLC393QDR require external pull-up resistors on its outputs?
Yes, the TLC393QDR features open-drain CMOS outputs and requires external pull-up resistors to establish a defined high-level voltage. The datasheet specifies that each output can sink up to 20 mA, and recommends a 5.1-kΩ pull-up to VDD for standard 5-V logic interfacing - a requirement inherent to the TLC393QDR's output architecture.
What is the typical supply current of the TLC393QDR at 5 V and 25°C?
The TLC393QDR draws 22–40 µA typical supply current (IDD) at 5 V and 25°C with both outputs low and no load, as specified in the "electrical characteristics" table for the Q-grade device. This ultra-low quiescent current is a defining feature of the TLC393QDR and critical for always-on automotive subsystems.
Can the TLC393QDR operate from a 3-V supply?
No, the TLC393QDR has a minimum supply voltage of 4 V, as explicitly stated in its "recommended operating conditions" table. While the TLC393CDR and TLC393IDR variants support 3 V, the Q-grade version is optimized for automotive 12-V systems and requires ≥4 V to guarantee specified performance across −40°C to +125°C.
Is the TLC393QDR pin-compatible with the LM393QDR?
No, the TLC393QDR and LM393QDR are not pin-compatible. Although both are dual comparators in SOIC-8 packages, the TLC393QDR uses a LinCMOS™ process with different internal ESD structure and input stage design - and the LM393QDR datasheet defines distinct pin functions and absolute maximum ratings. Direct substitution would require PCB revision.
TLC393QDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- LinCMOS™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- MOS, Open-Drain
- Voltage - Supply, Single/Dual (±):
- 4V ~ 16V
- :
- 5mV @ 10V
- Voltage - Input Offset (Max):
- 5pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 90µA
- Current - Quiescent (Max):
- 84dB CMRR
- CMRR, PSRR (Typ):
- 4.5µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TLC393QDR FAQ
1.How can I place an order for TLC393QDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC393QDR 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 TLC393QDR reliable?
The price and inventory of TLC393QDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC393QDR is usually 5 days.
3.What payment methods are accepted for TLC393QDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC393QDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC393QDR?
TLC393QDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC393QDR 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 TLC393QDR?
For technical support, including TLC393QDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC393QDR requirements.
6.How does Aetrix verify that TLC393QDR is sourced from the original manufacturer or authorized distributors?
All TLC393QDR 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 TLC393QDR meets industry standards.
7.What is the process for return or replacement of TLC393QDR?
All TLC393QDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC393QDR, 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 TLC393QDR part is unused and in its original packaging.
Return procedure for TLC393QDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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