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STMicroelectronics TS331IQT
- Part No.:
- TS331IQT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 6-UFDFN
- Datasheet:
-
TS331IQT.pdf
- Description:
- IC COMPARATOR 1 GEN PUR
- Quantity:
- Payment:
- Shipping:
Inventory:751
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Product details
Overview
TS331IQT from STMicroelectronics is a single-channel micropower rail-to-rail input comparator optimized for ultra-low-voltage battery-powered systems. It operates from 1.6 V to 5.0 V, draws only 20 µA typical supply current at 1.8 V, delivers 210 ns propagation delay (high-to-low) with 100 mV overdrive, and features open-drain output compatible with mixed-voltage logic interfaces in portable electronics.
For engineers reviewing the TS331IQT datasheet, TS331IQT pinout, TS331IQT application, or TS331IQT equivalent, this device is selected for precision threshold detection in space-constrained, low-quiescent-power designs-especially where rail-to-rail input common-mode range down to VCC− and sub-250 ns response are required under 2.0 V supply.
Technical Context
The TS331IQT uses a CMOS input stage enabling rail-to-rail input voltage operation from (VCC−) −0.2 V to (VCC+) +0.2 V at 25 °C, with full specification across −40 °C to +125 °C. Its open-drain output supports wired-OR configurations and level-shifting without external pull-up constraints.
Propagation delay is tightly specified across supply voltages (1.8 V/2.7 V/5 V) and temperature, with TPHL = 210–270 ns (typ.) and TPLH = 420–450 ns (typ.) at 100 mV overdrive, enabling reliable timing-critical window or zero-crossing detection in low-power sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 5.0 V - enables direct operation from single Li-ion, Li-polymer, or two-cell alkaline batteries without regulation. |
| Quiescent Current | 20 µA typ. at 1.8 V - extends battery life in always-on monitoring circuits (e.g., battery fuel gauging, wake-up triggers). |
| Input Offset Voltage | 0.5–5 mV typ. - supports accurate voltage thresholding within ±5 mV error at room temperature. |
| Propagation Delay (TPHL) | 210 ns typ. at 100 mV overdrive, 1.8 V supply - ensures fast response for high-speed enable/disable control in power management. |
| Input Common-Mode Range | (VCC−) −0.2 V to (VCC+) +0.2 V - allows direct sensing of signals referenced to ground or rail in single-supply systems. |
| Output Type | Open-drain - permits flexible pull-up to higher or lower voltage rails and supports multi-comparator wired-OR outputs. |
| ESD Rating | 2 kV HBM - provides robustness against handling and board-level electrostatic discharge in portable assembly environments. |
Pinout & Package
TS331IQT is supplied in the SOT23-5 package (also designated SC70-5), a 5-pin surface-mount plastic package with 0.95 mm lead pitch and 2.9 mm × 1.3 mm footprint. The exposed pad is not electrically connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (IN−) | Differential input terminal; accepts rail-to-rail common-mode signals from VCC− to VCC+. |
| 2 | Non-inverting Input (IN+) | Differential input terminal; used for reference or signal comparison with matched input bias performance. |
| 3 | Ground (VCC−) | Power return node; must be low-impedance connection to system ground plane for stable operation. |
| 4 | Output (OUT) | Open-drain NMOS output; requires external pull-up resistor to define logic-high level and sink capability up to 22 mA. |
| 5 | Supply (VCC+) | Positive supply rail; supports 1.6–5.0 V operation with internal bias generation independent of load. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables direct interface to sensors or ADCs operating at same supply without level-shifting circuitry. |
| 20 µA max supply current at 125 °C | Guarantees micropower operation across full automotive temperature range, critical for engine bay or industrial sensor nodes. |
| 210 ns propagation delay (TPHL) | Supports real-time overvoltage/undervoltage lockout in DC-DC converters with <1 µs response requirement. |
| −40 °C to +125 °C operating range | Qualified for automotive and industrial applications per AEC-Q100 stress test conditions. |
| Open-drain output with 22 mA sink capability | Drives LEDs, MOSFET gates, or microcontroller interrupt lines directly without additional buffer stages. |
Applications
| Battery Voltage Monitor | Low-Power Sensor Interface |
|---|---|
Use Scenario: Detecting end-of-discharge in a single-cell Li-ion battery (2.8 V cutoff) while minimizing standby current. IC Role / Device Role / Timing Role: Comparator compares battery voltage against precision reference; open-drain output pulls MCU reset line low on undervoltage event. Use Value: 20 µA quiescent current extends shelf life; rail-to-rail input allows direct sensing without resistive divider scaling errors. |
Use Scenario: Converting analog output from a MEMS accelerometer into digital motion-triggered interrupt signal. IC Role / Device Role / Timing Role: Threshold detector generating edge-triggered wake-up pulse when acceleration exceeds programmable g-level. Use Value: 210 ns TPHL ensures sub-microsecond latency; wide temperature range maintains accuracy across environmental variations. |
| USB Power Negotiation | Industrial PLC Input Conditioning |
Use Scenario: Validating VBUS presence and detecting USB detach events in portable host devices. IC Role / Device Role / Timing Role: Comparator monitors VBUS against 4.0 V threshold; open-drain output interfaces directly to 3.3 V GPIO with pull-up to VBUS. Use Value: 1.6 V minimum supply allows operation during brown-out; ESD tolerance prevents latch-up during hot-plug transients. |
Use Scenario: Level-shifting and noise-immune digital input conditioning for 24 V DC field signals in factory automation I/O modules. IC Role / Device Role / Timing Role: High-side comparator with resistor-divider input scales 24 V to safe range; output drives optocoupler LED via pull-up. Use Value: Rail-to-rail input accommodates wide common-mode swing; 2 kV HBM rating withstands industrial EMI coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower rail-to-rail comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | Lower supply current (150 nA typ.), but slower propagation delay (5 µs min.) and narrower supply range (1.8–5.5 V). | Best suited for ultra-low-power wake-up circuits where speed is secondary to energy budget. | Select TLV3691IDBVR only when sub-µA quiescent current dominates over response time requirements. |
| MAX9021AUT+T | Higher supply current (60 µA typ.), faster TPHL (120 ns), but no rail-to-rail input and limited to 2.5–5.5 V operation. | Preferred in higher-voltage, speed-critical applications like motor phase detection where input range is less constrained. | Choose MAX9021AUT+T when propagation delay <150 ns is mandatory and supply ≥2.5 V is guaranteed. |
Compared with TLV3691IDBVR and MAX9021AUT+T, TS331IQT uniquely balances 20 µA quiescent current, 210 ns speed, rail-to-rail input, and 1.6 V minimum supply-making it optimal for battery-powered systems requiring both precision and responsiveness across wide voltage and temperature ranges.
Availability
TS331IQT is available at Aetrix Electronics and suitable for battery voltage monitoring, portable sensor interfaces, USB power management, and industrial input conditioning requiring stable component supply across automotive and extended temperature grades.
Supply support for TS331IQT 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
TS331IQT belongs to the TS33x family of micropower comparators engineered specifically for ultra-low-voltage, space-constrained portable electronics where rail-to-rail input and sub-250 ns response are essential design requirements.
FAQ
Is TS331IQT qualified for automotive applications?
Yes. TS331IQT is AEC-Q100 qualified and specified for operation from −40 °C to +125 °C. Its electrical characteristics-including input offset voltage drift (≤4.5 µV/°C), supply current stability, and ESD tolerance (2 kV HBM)-are validated across this full automotive temperature range per standard test conditions.
Can TS331IQT drive an LED directly?
Yes. With a typical sink current capability of 22 mA at 1.8 V supply and VOL ≤30 mV at ISINK = 1 mA, TS331IQT's open-drain output can directly drive standard indicator LEDs using a series current-limiting resistor tied to VCC+. No external transistor buffer is needed for low-current indicators.
What is the maximum recommended pull-up resistor value for the open-drain output?
For reliable 3.3 V logic-high signaling with ≤100 ns rise time and 1.8 V supply, the maximum recommended pull-up resistor is 10 kΩ to 3.3 V. At 5 V supply and 25 °C, up to 47 kΩ is acceptable for slower interfaces (e.g., microcontroller GPIO with internal weak pull-ups disabled).
Does TS331IQT require external hysteresis for noisy input signals?
Yes. TS331IQT has no internal hysteresis. For inputs with >10 mV peak-to-peak noise, external positive feedback (e.g., 10 MΩ resistor from OUT to IN+) adds ~5–10 mV hysteresis, preventing multiple toggles near threshold. Layout best practices-short traces, local bypass capacitor-also reduce susceptibility.
TS331IQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 6-UFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.6V ~ 5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.4µA @ 5V
- Current - Input Bias (Max):
- 93mA @ 5V
- Current - Output (Typ):
- 26µA
- Current - Quiescent (Max):
- 79dB CMRR
- CMRR, PSRR (Typ):
- 720ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- -
TS331IQT FAQ
1.How can I place an order for TS331IQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS331IQT 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 TS331IQT reliable?
The price and inventory of TS331IQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS331IQT is usually 5 days.
3.What payment methods are accepted for TS331IQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS331IQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS331IQT?
TS331IQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS331IQT 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 TS331IQT?
For technical support, including TS331IQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS331IQT requirements.
6.How does Aetrix verify that TS331IQT is sourced from the original manufacturer or authorized distributors?
All TS331IQT 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 TS331IQT meets industry standards.
7.What is the process for return or replacement of TS331IQT?
All TS331IQT units undergo pre-shipment inspection (PSI). If there is an issue with TS331IQT, 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 TS331IQT part is unused and in its original packaging.
Return procedure for TS331IQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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