My Inquiry
My Account
Texas Instruments TL331QDBVRQ1
- Part No.:
- TL331QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL331QDBVRQ1.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,890
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL331QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive single voltage comparator in SOT-23-5 package, operating from 2V to 36V supply, with 0.43mA typical supply current, ±0.37mV typical input offset voltage, and 1µs typical propagation delay. It delivers open-collector output compatible with TTL/MOS/CMOS logic and supports ground-sensing inputs for battery monitoring and overvoltage detection in powertrain control units.
For engineers reviewing the TL331QDBVRQ1 datasheet, TL331QDBVRQ1 pinout, TL331QDBVRQ1 application, or TL331QDBVRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating limits (–40°C to +125°C), and real-world design implications for wired-AND interfacing, level-shifting, and fault-detection circuits.
Technical Context
The TL331QDBVRQ1 implements a PNP Darlington pair input stage enabling high gain, low input bias current (3.5nA typ), and rail-to-rail common-mode input range down to ground. Its open-collector NPN output stage sinks up to 18mA and requires external pull-up for logic-high assertion.
It operates across 2V–36V single-supply or dual-supply configurations (ΔV ≥ 2V, VCC ≥ VCM + 1.5V), with differential input voltage tolerance of ±36V and dedicated ESD protection cells meeting AEC-Q100 HBM ±2000V and CDM ±750V requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - supports direct connection to 12V/24V automotive batteries and industrial rails without regulation. |
| Input Offset Voltage (max) | ±4mV over –40°C to +125°C - ensures reliable threshold detection in engine control and battery management systems. |
| Propagation Delay | 1µs typical (TTL input) - enables fast response in overcurrent trip and window comparator applications. |
| Quiescent Current | 330µA max at 36V and +125°C - maintains low power consumption in always-on vehicle subsystems. |
| Input Bias Current (max) | 25nA over temperature - minimizes voltage error in high-impedance sensor interfaces like thermistor or potentiometer networks. |
| Output Sink Current | 18mA at VOL = 1.5V - drives standard LED indicators or directly interfaces with MCU GPIOs via pull-up resistors. |
| Junction Temperature Range | –40°C to +125°C - certified for under-hood placement in HEV/EV powertrain modules per AEC-Q100 Grade 1. |
Pinout & Package
SOT-23-5 (DBV) package, 2.90mm × 1.60mm body size, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Negative Input (IN–) | Inverting comparator input; referenced against IN+ to determine output state; accepts voltages from GND to VCC – 1.5V. |
| 2 | Ground (GND) | Power return path and reference for internal biasing; must be low-impedance for stable operation. |
| 3 | Positive Input (IN+) | Non-inverting comparator input; used for threshold or reference signal; shares same common-mode range as IN–. |
| 4 | Output (OUT) | Open-collector NPN output; sinks current when IN– > IN+ + VIO; requires external pull-up for logic-high level translation. |
| 5 | Supply (VCC) | Positive power rail; supports 2V–36V; powers internal bias circuitry and output transistor; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, meeting automotive powertrain and body electronics reliability standards. |
| Ground-sensing input capability | Common-mode input range includes 0V, enabling direct interface with shunt-based current sensing and battery negative-rail monitoring. |
| Wired-AND output topology | Open-collector output allows multiple comparators to share a single pull-up and generate logical AND behavior without external logic gates. |
| Differential input voltage tolerance | ±36V rating protects against transients and reverse-battery conditions in 12V/24V automotive systems. |
| Low input bias current | 3.5nA typical enables use with high-value resistor dividers (e.g., 1MΩ+) in voltage monitoring without significant loading error. |
Applications
| Overvoltage Protection Circuit | Battery State-of-Charge Monitor |
|---|---|
Use Scenario: Detects battery voltage exceeding safe thresholds (e.g., >16V in 12V system) to trigger shutdown or warning. IC Role / Device Role / Timing Role: Single comparator comparing sensed battery voltage against precision reference; open-collector output drives fault latch or MCU interrupt line. Use Value: Enables fail-safe response within 1µs, leveraging ±36V input tolerance to survive load-dump transients without external clamping. |
Use Scenario: Monitors cell voltage or pack voltage during charging/discharging to estimate remaining capacity. IC Role / Device Role / Timing Role: Compares scaled battery voltage to fixed thresholds (e.g., 3.0V, 3.3V, 4.2V) to indicate low/high SOC states. Use Value: Ground-referenced input allows direct measurement on battery negative terminal; low 3.5nA bias current avoids discharge error in high-impedance divider networks. |
| Engine Coolant Temperature Threshold Detector | DC-DC Converter Feedback Comparator |
Use Scenario: Triggers fan activation or dashboard warning when coolant exceeds 110°C using NTC thermistor network. IC Role / Device Role / Timing Role: Compares thermistor voltage divider output to fixed reference; output drives relay driver or microcontroller input. Use Value: Operates reliably at +125°C junction temperature; ±4mV max offset ensures accurate trip point across full automotive temperature range. |
Use Scenario: Compares feedback voltage from DC-DC converter output against reference to maintain regulation. IC Role / Device Role / Timing Role: Precision comparator in voltage-mode control loop; open-collector output interfaces with optocoupler or PWM controller enable pin. Use Value: 2V–36V supply range matches wide-input industrial DC-DC topologies; 0.43mA quiescent current minimizes no-load losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL331BQDBVRQ1 | Lower offset voltage (±0.37mV typ vs. ±2mV typ for legacy TL331-Q1), lower supply current (330µA vs. 700µA), faster response (1µs vs. 1.3µs). | Drop-in replacement for TL331QDBVRQ1 in new designs requiring tighter accuracy and lower power. | Select TL331BQDBVRQ1 when upgrading legacy TL331-Q1 designs for improved performance without layout change. |
| LM393QPWRQ1 | Dual-channel, higher input bias current (250nA max), wider offset spread (±9mV max), same Grade 1 temp range and SOT-23-8 package. | Used where dual comparators are needed (e.g., window comparator), but requires PCB redesign due to different pin count and layout. | Choose LM393QPWRQ1 only when dual comparison functionality is required and board space allows SOT-23-8 footprint. |
Compared with TL331QDBVRQ1, TL331BQDBVRQ1 offers measurable improvements in offset, speed, and quiescent current while maintaining pin compatibility; LM393QPWRQ1 provides channel count flexibility at the cost of increased bias current and non-drop-in packaging.
Availability
TL331QDBVRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, battery management systems, and infotainment power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL331QDBVRQ1 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 automotive qualification expertise and broad portfolio of AEC-Q100-compliant components.
The TL331-Q1 family was designed specifically for cost-sensitive automotive applications demanding robustness, wide supply range, and ground-sensing capability - targeting body electronics, powertrain, and EV/HEV subsystems.
FAQ
What is the maximum operating junction temperature for TL331QDBVRQ1?
The TL331QDBVRQ1 is rated for a maximum junction temperature of +125°C, consistent with its AEC-Q100 Grade 1 qualification. This specification is explicitly stated in Section 5.4 of the official datasheet for the TL331QDBVRQ1 variant, confirming suitability for under-hood automotive environments where ambient temperatures reach +105°C.
Does TL331QDBVRQ1 support dual-supply operation?
Yes, TL331QDBVRQ1 supports dual-supply operation when the difference between the two supplies is 2V to 36V and VCC is at least 1.5V more positive than the input common-mode voltage. This configuration is documented in the device description section and enables use in bipolar signal conditioning applications while retaining its open-collector output architecture.
What is the input common-mode voltage range for TL331QDBVRQ1?
The input common-mode voltage range for TL331QDBVRQ1 is from GND to VCC – 1.5V at 25°C, and from GND to VCC – 2.0V over the full –40°C to +125°C temperature range. This ground-inclusive range is confirmed in Table 5.7 of the datasheet and enables direct interface with low-side current sense amplifiers and battery negative-rail monitoring circuits.
Is TL331QDBVRQ1 pin-compatible with TL331BQDBVRQ1?
Yes, TL331QDBVRQ1 and TL331BQDBVRQ1 share identical SOT-23-5 (DBV) packaging and pinout configuration - both follow the TL331-Q1 pin mapping (IN–, GND, IN+, OUT, VCC). This mechanical and electrical compatibility is confirmed in Figures 4-1 and 4-2 of the datasheet, enabling drop-in replacement in existing layouts.
What output logic families is TL331QDBVRQ1 compatible with?
TL331QDBVRQ1 features an open-collector output compatible with TTL, MOS, and CMOS logic families when used with an appropriate external pull-up resistor. Its output sink capability (18mA max) and low VOL (400mV max at 4mA) ensure reliable interfacing with 3.3V and 5V digital systems, as specified in Section 5.7 Electrical Characteristics.
TL331QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- SOT-23-5
TL331QDBVRQ1 FAQ
1.How can I place an order for TL331QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL331QDBVRQ1 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 TL331QDBVRQ1 reliable?
The price and inventory of TL331QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL331QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TL331QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL331QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL331QDBVRQ1?
TL331QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL331QDBVRQ1 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 TL331QDBVRQ1?
For technical support, including TL331QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL331QDBVRQ1 requirements.
6.How does Aetrix verify that TL331QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TL331QDBVRQ1 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 TL331QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TL331QDBVRQ1?
All TL331QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TL331QDBVRQ1, 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 TL331QDBVRQ1 part is unused and in its original packaging.
Return procedure for TL331QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL331QDBVRQ1 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
