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STMicroelectronics TSX3702IQ2T
- Part No.:
- TSX3702IQ2T
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
TSX3702IQ2T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:16,313
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Product details
Overview
TSX3702IQ2T from STMicroelectronics is a micropower CMOS dual voltage comparator with 5 µA typical supply current per comparator, 1 pA typical input bias current, and push-pull output stage. It operates from 2.7 V to 16 V single supply (or ±1.35 V to ±8 V dual), features rail-to-rail input common-mode range including ground, and is qualified for automotive applications in DFN8 2×2 mm package.
For engineers reviewing the TSX3702IQ2T datasheet, TSX3702IQ2T pinout, TSX3702IQ2T application, or TSX3702IQ2T equivalent, key selection criteria include ultra-low quiescent current, high input impedance (10¹² Ω), fast 2.7 µs response at 5 mV overdrive, ESD tolerance (4 kV HBM), and compatibility with TS3702 while offering improved offset voltage and enhanced ESD robustness.
Technical Context
The TSX3702IQ2T integrates two independent CMOS comparators with ESD-protected inputs capable of accepting voltages from −0.3 V to 16 V regardless of VCC, enabling robust interfacing with overvoltage-tolerant sensors and legacy systems. Its input stage prevents phase reversal and supports common-mode operation down to ground.
Each comparator delivers push-pull output with low output voltage drop (90–400 mV at 4 mA sink/source), specified across −40 °C to +125 °C, and exhibits supply voltage rejection ratio up to 90 dB and common-mode rejection ratio up to 90 dB - critical for noisy industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 16 V single supply - enables direct battery-powered operation from Li-ion (3.0–4.2 V) up to 12 V automotive rails without regulation. |
| Quiescent Current | 5 µA per comparator typ. at 3 V - extends battery life in always-on sensor monitoring and low-power wake-up circuits. |
| Input Bias Current | 1 pA typ. - permits high-impedance sensor interfacing (e.g., pH electrodes, photodiodes) without signal loading. |
| Response Time | 2.7 µs typ. at 5 mV overdrive - supports fast threshold detection in motor control feedback and fault-sensing loops. |
| ESD Tolerance | 4 kV HBM - meets automotive system-level ESD requirements per ISO 10605 without external protection. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive and industrial control unit deployment. |
| Input Common-Mode Range | Includes ground to VCC − 1.5 V - allows direct connection to 0 V-referenced transducers and logic-level signals. |
Pinout & Package
TSX3702IQ2T is housed in a 2×2 mm DFN8 (dual-flat no-lead) plastic micropackage with exposed thermal pad, optimized for space-constrained automotive and portable electronics designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Push-pull CMOS output capable of sourcing/sinking 4 mA; compatible with 3.3 V/5 V logic interfaces. |
| 2 (IN1−) | Comparator 1 inverting input | Differential input terminal with 1 pA bias current; accepts −0.3 V to 16 V regardless of VCC. |
| 3 (IN1+) | Comparator 1 non-inverting input | Differential input terminal with identical ESD-hardened structure and voltage tolerance as IN1−. |
| 4 (VCC−) | Negative supply / ground | Reference node for dual-supply operation; tied to GND in single-supply configurations. |
| 5 (VCC+) | Positive supply | Primary power rail (2.7–16 V); powers both comparators and internal bias circuitry. |
| 6 (OUT2) | Comparator 2 output | Independent push-pull output, electrically isolated from OUT1; supports dual-threshold detection. |
| 7 (IN2−) | Comparator 2 inverting input | Second differential pair with same precision and robustness as first channel. |
| 8 (IN2+) | Comparator 2 non-inverting input | Enables fully independent dual-comparator functionality without crosstalk or shared reference constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 5 µA per comparator enables >10-year battery life in coin-cell-powered IoT sensors and tire pressure monitors. |
| Overvoltage-tolerant inputs | Inputs withstand −0.3 V to 16 V independent of VCC, eliminating level-shifters when interfacing with 24 V industrial sensors. |
| Automotive-grade qualification | AEC-Q100 qualified (Grade 0/1 implied by −40 °C to +125 °C spec and automotive order codes) for engine control and ADAS subsystems. |
| Phase-reversal immunity | Guaranteed correct output polarity even when inputs exceed common-mode limits - prevents false triggering in transient conditions. |
| Miniaturized DFN8 package | 2×2 mm footprint with 0.5 mm pitch reduces PCB area by >60% vs. SO8, supporting high-density automotive ECUs and wearable medical devices. |
Applications
| Engine Coolant Temperature Monitoring | Battery Cell Voltage Balancing |
|---|---|
|
Use Scenario: Detecting coolant temperature thresholds to trigger fan activation or warning indicators in real time. IC Role / Device Role / Timing Role: Dual comparator compares sensor voltage against two fixed reference levels (e.g., 85 °C and 105 °C) to generate discrete overheat alerts. Use Value: Ultra-low 5 µA quiescent current minimizes parasitic drain on vehicle battery during extended parking; 125 °C rating ensures reliability near engine block. |
Use Scenario: Monitoring individual Li-ion cell voltages in multi-cell packs to initiate passive balancing when deviation exceeds 20 mV. IC Role / Device Role / Timing Role: One comparator detects upper threshold (e.g., 4.25 V), second detects lower threshold (e.g., 2.5 V) to enable bidirectional cell management logic. Use Value: 1 pA input bias avoids measurement error in high-resistance voltage divider networks; push-pull outputs drive MOSFET gates directly without pull-up resistors. |
| Industrial Proximity Sensor Interface | Medical Infusion Pump Safety Interlock |
|
Use Scenario: Converting analog output from inductive proximity sensors into clean digital signals for PLC input modules. IC Role / Device Role / Timing Role: Comparator provides hysteresis-free threshold detection with fast 2.7 µs response to capture rapid metal object transitions. Use Value: Input common-mode range including ground allows direct connection to 0–10 V sensor outputs; 4 kV HBM ESD rating eliminates need for external TVS diodes. |
Use Scenario: Verifying door closure and syringe presence before initiating drug delivery in Class II medical devices. IC Role / Device Role / Timing Role: Dual comparators monitor redundant mechanical switch states and optical sensor outputs to enforce hardware-level safety interlocks. Use Value: AEC-Q100-aligned reliability and −40 °C to +125 °C operation ensure functional safety compliance (IEC 62304); low ICC supports battery backup during AC power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3702IDT | Higher 10 µA typical supply current; 2 mV max input offset; SO8 only; no AEC-Q100 automotive qualification. | Limited to commercial-temperature industrial controls; lacks overvoltage-tolerant inputs beyond VCC. | Select when cost sensitivity outweighs power/automotive requirements and SO8 footprint is preferred. |
| TLV3702DR | 6 µA typical ICC; rail-to-rail output swing; 1.8 V min supply; 2.5 mV max VIO; 2 kV HBM ESD. | Optimized for ultra-low-voltage portable systems (e.g., wearables); not rated for 125 °C or automotive use. | Choose for sub-3 V battery applications where extended temperature range is unnecessary. |
Compared with TS3702IDT and TLV3702DR, the TSX3702IQ2T uniquely combines automotive qualification, 1 pA input bias, 4 kV HBM ESD, and DFN8 miniaturization - making it the only option suitable for space-constrained, high-reliability automotive sensor nodes requiring nanoscale input loading.
Availability
TSX3702IQ2T is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and medical infusion pump safety interlocks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSX3702IQ2T 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The TSX3702 series belongs to ST's precision analog comparators product line, engineered specifically for ultra-low-power, high-accuracy threshold detection in harsh-environment automotive and industrial applications.
FAQ
What is the maximum input voltage the TSX3702IQ2T can tolerate relative to VCC?
The TSX3702IQ2T inputs tolerate −0.3 V to 16 V regardless of VCC value, enabled by its internal ESD clamp architecture. At 125 °C, leakage remains below 250 nA when VIN exceeds VCC, allowing direct interface with unregulated 24 V sensors without external clamping diodes.
Does the TSX3702IQ2T support dual-supply operation, and what are the limits?
Yes - it supports dual supplies from ±1.35 V to ±8 V. The absolute maximum ratings specify ±18 V differential input voltage and ±18 V supply rails, but recommended operating range is ±1.35 V to ±8 V. VCC+ and VCC− must maintain ≥2.7 V total differential to ensure proper internal biasing.
How does the DFN8 2×2 mm package affect thermal performance compared to SO8?
The DFN8 2×2 mm package has a junction-to-ambient thermal resistance (RthJA) of 57 °C/W - significantly lower than SO8's 125 °C/W - due to its exposed thermal pad and shorter thermal path. This enables higher sustained output current (up to 4 mA) at elevated ambient temperatures without derating.
Can the TSX3702IQ2T replace the TS3702IDT in existing designs without layout changes?
No - the TSX3702IQ2T uses a DFN8 2×2 mm package with 0.5 mm pitch, while TS3702IDT uses SO8 with 1.27 mm pitch. Pin functions are identical (pin-for-pin compatible signal mapping), but PCB footprint, solder stencil, and reflow profile must be redesigned to accommodate the smaller, leadless package and thermal pad requirements.
TSX3702IQ2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-UFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Push-Pull
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 16V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 10pA
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 8µA
- Current - Quiescent (Max):
- 85dB CMRR, 89dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-DFN (2x2)
TSX3702IQ2T FAQ
1.How can I place an order for TSX3702IQ2T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSX3702IQ2T 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 TSX3702IQ2T reliable?
The price and inventory of TSX3702IQ2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX3702IQ2T is usually 5 days.
3.What payment methods are accepted for TSX3702IQ2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX3702IQ2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSX3702IQ2T?
TSX3702IQ2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSX3702IQ2T 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 TSX3702IQ2T?
For technical support, including TSX3702IQ2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX3702IQ2T requirements.
6.How does Aetrix verify that TSX3702IQ2T is sourced from the original manufacturer or authorized distributors?
All TSX3702IQ2T 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 TSX3702IQ2T meets industry standards.
7.What is the process for return or replacement of TSX3702IQ2T?
All TSX3702IQ2T units undergo pre-shipment inspection (PSI). If there is an issue with TSX3702IQ2T, 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 TSX3702IQ2T part is unused and in its original packaging.
Return procedure for TSX3702IQ2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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