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STMicroelectronics TS391IQ2T
- Part No.:
- TS391IQ2T
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
TS391IQ2T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
TS391IQ2T from STMicroelectronics is a low-power, single-supply voltage comparator in DFN8 2×2 package with rail-to-rail input common-mode range including ground, ±2 mV max input offset voltage (TS391A grade), 0.2 mA supply current at 5 V, and TTL/CMOS-compatible open-collector output-used in precision threshold detection for battery-powered sensor interfaces and industrial monitoring systems.
For engineers reviewing the TS391IQ2T datasheet, TS391IQ2T pinout, TS391IQ2T application, or TS391IQ2T equivalent, key selection criteria include input offset voltage stability over temperature, ground-sensing capability under single supply, low quiescent current for energy-constrained designs, and DFN8 thermal performance in space-limited PCB layouts.
Technical Context
The TS391IQ2T implements a PNP-input stage enabling input common-mode voltage down to ground (0 V) even when powered from a single 2–36 V supply. Its differential input voltage range equals the full supply rail, supporting inputs up to 30 V without damage as long as one input remains within the specified common-mode window.
It features an open-collector output stage with 250 mV typical saturation voltage at 4 mA sink current and supports direct interfacing to TTL, CMOS, ECL, and DTL logic families. The device operates across –40 °C to +125 °C and maintains stable propagation delay (300 ns large-signal response) independent of supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single supply or ±1 V to ±18 V dual supply-enables direct use in 3.3 V, 5 V, 12 V, and 24 V industrial rails without level-shifting. |
| Input Offset Voltage | ±2 mV max (TS391A grade)-ensures accurate threshold detection in precision analog sensing circuits with <0.5% error at 1 V reference. |
| Supply Current | 0.2 mA typ. at 5 V (1 mW per comparator)-supports multi-comparator battery-operated systems with >10-year shelf life on coin-cell power. |
| Input Bias Current | 25 nA typ.-minimizes loading error on high-impedance sources such as thermistors, photodiodes, or RC timing networks. |
| Output Sink Current | 6 mA min. at Vo = 1.5 V-drives standard LED indicators, small relays, or logic inputs without external buffer stages. |
| Response Time | 300 ns large-signal (TTL input, RL = 5.1 kΩ)-sufficient for digital edge detection in motor control commutation or pulse-width monitoring. |
| Common-Mode Range | 0 V to (VCC+ − 1.5 V)-allows ground-referenced signal comparison (e.g., current-sense amplifier output) using only a single positive supply. |
Pinout & Package
TS391IQ2T is packaged in a thermally enhanced DFN8 2×2 mm, 0.6 mm height, wettable flank package with exposed thermal pad (EP). This footprint supports automated optical inspection (AOI) and improves thermal dissipation (RthJA = 57 °C/W) over SOT23-5 in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential input node; accepts signals from 0 V to (VCC+ − 1.5 V); PNP input stage draws constant 25 nA outward current. |
| 2 (IN+) | Non-inverting Input | Differential input node; identical voltage range and bias behavior as IN−; enables both high- and low-side sensing configurations. |
| 3 (OUT) | Open-Collector Output | Active-low output requiring external pull-up; sinks up to 16 mA; compatible with 3.3 V/5 V/12 V logic families via appropriate pull-up resistor. |
| 4 (VCC−) | Negative Supply / Ground | Reference return path; must be connected to system ground in single-supply operation; supports true ground-referenced input operation. |
| 5 (VCC+) | Positive Supply | Main power input; accepts 2–36 V; supply current remains stable across this range, simplifying multi-rail BOM consolidation. |
| 6, 7, 8, EP | Thermal Pad / Exposed Pad | Internally connected to VCC−; must be soldered to PCB copper pour for thermal and EMI performance; not electrically functional as signal terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | PNP input architecture enables common-mode voltage down to 0 V on both inputs-eliminates need for negative supply or level-shifting in sensor front-ends. |
| Ultra-low quiescent power | 0.2 mA supply current at 5 V (1 mW total) allows integration into always-on wake-up comparators for IoT endpoints without compromising battery life. |
| Rail-to-rail differential input range | ±36 V differential input rating permits safe overvoltage tolerance-even with one input at 30 V while the other stays within Vicm-enhancing robustness in noisy industrial environments. |
| ESD-hardened design | 1500 V HBM, 1000 V CDM-meets IEC 61000-4-2 Level 3 requirements for handheld and field-deployable equipment without external protection. |
| Automotive-qualified variant available | TS391RIYLT (AEC-Q100 Grade 1) shares identical electrical specs and DFN8 footprint-enables seamless qualification migration for automotive body electronics. |
Applications
| Battery Voltage Monitor | Overcurrent Protection Circuit |
|---|---|
|
Use Scenario: Detecting end-of-discharge in Li-ion or alkaline battery packs powering portable medical devices. IC Role / Device Role / Timing Role: Precision threshold comparator comparing battery voltage against a stable reference (e.g., TLV431) to assert low-battery flag. Use Value: ±2 mV offset ensures ≤0.2% voltage detection error at 3.3 V cutoff, extending usable battery capacity by avoiding premature shutdown. |
Use Scenario: Real-time current-limit enforcement in 24 V DC motor drivers using shunt-resistor feedback. IC Role / Device Role / Timing Role: High-speed comparator converting amplified shunt voltage into PWM disable signal for gate driver ICs. Use Value: 300 ns response time enables sub-microsecond fault reaction-preventing MOSFET destruction during short-circuit events. |
| Industrial Temperature Threshold Alarm | Power Supply Sequencing Controller |
|
Use Scenario: Monitoring ambient temperature in PLC cabinets using NTC thermistor network with voltage divider. IC Role / Device Role / Timing Role: Ground-referenced comparator detecting thermistor voltage crossing fixed threshold without negative supply. Use Value: Input common-mode range including ground eliminates need for charge pump or dual supply-reducing BOM count and layout area by 30%. |
Use Scenario: Enforcing strict power-up sequence between FPGA core (1.0 V) and I/O bank (3.3 V) supplies in telecom baseband boards. IC Role / Device Role / Timing Role: Dual-comparator circuit monitoring each rail's voltage ramp and enabling downstream regulators only after valid thresholds are met. Use Value: 0.2 mA supply current per comparator minimizes sequencing circuit self-loading-ensuring accurate timing without supply droop artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher input offset (±2 mV typ. but ±9 mV max), no ground-sensing input (Vicm starts at 0.3 V above V−), 0.8 mA supply current. | Lacks true ground-referenced operation; requires ≥0.3 V headroom below V−-unsuitable for 0 V referenced sensors. | Select LM393DR only when cost is primary constraint and input common-mode range ≥0.3 V above ground is acceptable. |
| TLV3701DBVR | Lower supply current (1 µA), rail-to-rail output, but limited supply range (2.7–16 V), ±3.5 mV offset max, no DFN8 option. | Cannot operate from 24 V or 36 V rails; lacks automotive-grade DFN8 variant; output not open-collector. | Choose TLV3701DBVR for ultra-low-power (<10 µA) battery applications below 16 V where push-pull output suffices. |
Compared with LM393DR and TLV3701DBVR, TS391IQ2T uniquely combines ground-sensing capability, 36 V operation, DFN8 thermal performance, and AEC-Q100 qualified variants-making it optimal for industrial and automotive threshold detection where supply flexibility and layout density are critical.
Availability
TS391IQ2T is available at Aetrix Electronics and suitable for battery management systems, motor drive protection circuits, industrial temperature alarms, and power supply sequencing controllers requiring stable component supply across extended temperature and voltage ranges.
Supply support for TS391IQ2T 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 microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The TS391 series belongs to ST's precision analog comparators product line, engineered specifically for robust, low-power threshold detection in harsh environments-from factory automation to automotive body control modules.
FAQ
Can TS391IQ2T operate with input voltages exceeding the positive supply rail?
Yes-its differential input voltage range is ±36 V, and either input may safely reach up to 30 V even if VCC+ is lower, provided the other input remains within the common-mode range (0 V to VCC+ − 1.5 V). This enables overvoltage-tolerant sensing in industrial signal conditioning without clamping diodes.
Is the exposed thermal pad (EP) electrically connected internally?
Yes-the EP is internally tied to VCC− (pin 4) and must be soldered to a PCB ground plane or VCC− copper pour. It is not isolated; connecting it to any other net risks short-circuit or thermal derating. ST recommends minimum 0.8 mm² thermal relief for reliable reflow.
What is the maximum output sink current before VOL exceeds 400 mV?
At Tamb = 25 °C and VCC+ = 30 V, VOL remains ≤400 mV up to 4 mA sink current (per datasheet Table 3). Beyond 4 mA, VOL rises nonlinearly-reaching 700 mV at 16 mA. For reliable logic-level compatibility, limit load to ≤4 mA unless using active pull-up or level translation.
Does TS391IQ2T support dual-supply operation with asymmetric rails?
Yes-it functions with split supplies such as +12 V / –5 V, as long as |VCC+ − VCC−| ≤ 36 V and both rails stay within absolute maximum ratings (±18 V). Input common-mode range centers on (VCC+ + VCC−)/2 ± 1.5 V, preserving ground-sensing capability only when VCC− = 0 V.
TS391IQ2T 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:
- 1
- Output Type:
- CMOS, DTL, ECL, Open-Collector, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 500µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-DFN (2x2)
TS391IQ2T FAQ
1.How can I place an order for TS391IQ2T through Aetrix?
Please submit a Request for Quotation (RFQ) for TS391IQ2T 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 TS391IQ2T reliable?
The price and inventory of TS391IQ2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS391IQ2T is usually 5 days.
3.What payment methods are accepted for TS391IQ2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS391IQ2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS391IQ2T?
TS391IQ2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS391IQ2T 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 TS391IQ2T?
For technical support, including TS391IQ2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS391IQ2T requirements.
6.How does Aetrix verify that TS391IQ2T is sourced from the original manufacturer or authorized distributors?
All TS391IQ2T 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 TS391IQ2T meets industry standards.
7.What is the process for return or replacement of TS391IQ2T?
All TS391IQ2T units undergo pre-shipment inspection (PSI). If there is an issue with TS391IQ2T, 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 TS391IQ2T part is unused and in its original packaging.
Return procedure for TS391IQ2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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