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STMicroelectronics TS391IYLT
- Part No.:
- TS391IYLT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS391IYLT.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:93,928
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Product details
Overview
TS391IYLT from STMicroelectronics is a low-power, single-supply voltage comparator in SOT23-5 package, featuring 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. It operates from 2 V to 36 V single supply or ±1 V to ±18 V dual supply, and is qualified to AEC-Q100 for automotive applications including battery monitoring and window lift control.
For engineers reviewing the TS391IYLT datasheet, TS391IYLT pinout, TS391IYLT application, or TS391IYLT equivalent, this device is selected for precision threshold detection in harsh-temperature industrial sensors, automotive body electronics requiring ground-sensing capability, and low-quiescent-power portable equipment where supply headroom is constrained.
Technical Context
The TS391IYLT uses a PNP-input stage enabling input common-mode voltage down to ground on single supply - a key differentiator versus standard CMOS comparators. Its differential input voltage range equals the full supply rail (±36 V), allowing overvoltage-tolerant sensing without external clamping.
It delivers 300 ns large-signal response time with 1.4 V reference compatibility and sinks up to 16 mA while maintaining 250 mV typical saturation voltage at 4 mA - enabling direct interface with logic families and discrete load drivers without pull-up resistor optimization.
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 - supports wide-input automotive and industrial rails without regulation. |
| Input Offset Voltage | ±2 mV max (TS391A grade) - enables accurate 1% threshold detection at 200 mV reference level. |
| Supply Current | 0.2 mA typ. at 5 V - reduces system power by >80% vs. legacy comparators in always-on sensor nodes. |
| Input Bias Current | 25 nA typ. - minimizes error in high-impedance voltage divider interfaces (e.g., thermistor or photodiode networks). |
| Output Sink Current | 16 mA max - drives LEDs, relays, or logic inputs directly without external buffer stages. |
| Response Time | 300 ns large-signal - meets timing requirements for overvoltage lockout and fast fault detection in motor controllers. |
| Common-Mode Range | 0 V to (VCC+ − 1.5 V) - allows ground-referenced signal comparison without level-shifting circuitry. |
Pinout & Package
SOT23-5 package: 2.9 mm × 1.3 mm × 1.0 mm body, surface-mount, moisture-sensitive level 1 (MSL1), RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC+ | Positive supply terminal | Accepts 2–36 V single supply or positive rail of dual supply; powers internal bias and output stage. |
| 2: IN− | Inverting input | Differential input node; referenced to threshold or reference voltage in high-side sensing configurations. |
| 3: OUT | Open-collector output | Sinks current only; requires external pull-up to define logic-high level and interface voltage domain. |
| 4: VCC− | Negative supply / ground terminal | Connected to 0 V in single-supply operation; enables true ground-sensing capability at inputs. |
| 5: IN+ | Non-inverting input | Signal input node; used for active-high threshold detection (e.g., battery voltage above setpoint). |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | PNP differential pair enables common-mode range down to 0 V on single supply - eliminates need for negative rail or level shifters in battery-monitoring circuits. |
| Low quiescent power | 0.2 mA supply current independent of VCC - extends battery life in always-on automotive modules such as door module wake-up detectors. |
| Rail-to-rail differential input | ±36 V differential input range - tolerates transient overvoltages beyond supply rails without damage or latch-up. |
| Automotive qualification | AEC-Q100 Grade 1 (−40 °C to +125 °C) - validated for under-hood and body-control unit deployment with guaranteed parametric stability. |
| TTL/CMOS-compatible output | 16 mA sink capability with 250 mV saturation - ensures reliable logic-level translation across 3.3 V, 5 V, and 12 V domains using standard pull-up resistors. |
Applications
| Battery Voltage Monitor | Window Lift Overcurrent Detection |
|---|---|
|
Use Scenario: Real-time monitoring of 12 V lead-acid battery voltage during engine start-stop cycles. IC Role / Device Role / Timing Role: Comparator compares sensed battery voltage against 11.8 V reference to trigger low-voltage warning before ECU brownout. Use Value: Ground-referenced input allows direct connection to battery negative terminal; low 0.2 mA supply current avoids parasitic drain during vehicle sleep mode. |
Use Scenario: Detecting motor stall in automotive power window systems by monitoring current-sense resistor voltage. IC Role / Device Role / Timing Role: Compares amplified shunt voltage against 150 mV threshold to assert fault signal within 300 ns of overcurrent event. Use Value: 16 mA sink output drives automotive-grade optocoupler directly; AEC-Q100 qualification ensures reliability across thermal cycling in door modules. |
| Industrial Temperature Sensor Interface | Portable Smoke Detector Threshold Comparator |
|
Use Scenario: Converting NTC thermistor voltage divider output into digital alert when temperature exceeds 85 °C. IC Role / Device Role / Timing Role: Non-inverting configuration with precision reference sets trip point; output triggers MCU interrupt on overtemperature. Use Value: 25 nA input bias current prevents loading of high-resistance thermistor network; ±2 mV offset ensures <0.5 °C trip-point error at 25 °C calibration. |
Use Scenario: Comparing photoelectric chamber output to alarm threshold in battery-powered smoke alarms. IC Role / Device Role / Timing Role: Low-power comparator detects smoke-induced light scattering signal exceeding 100 mV reference level. Use Value: 0.2 mA supply current enables >5-year shelf life on CR123A battery; SOT23-5 footprint minimizes PCB area in compact detector housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, ground-sensing comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV331M5X/NOPB | Higher input offset (±7 mV), no ground-sensing capability (input common-mode starts at V− + 0.2 V) | Requires level-shifter for ground-referenced inputs; unsuitable for direct battery-negative sensing | Select only if supply rail ≥5 V and input signals remain >0.2 V above ground. |
| TLV3701DBVR | Lower supply current (1 µA), but limited VCC range (1.8–5.5 V); rail-to-rail input but not ground-sensing on single supply | Cannot operate from 12 V or 24 V automotive rails; incompatible with unregulated battery inputs | Prefer for ultra-low-power 3.3 V IoT sensors only - not a functional substitute for TS391IYLT's wide-VCC and ground-sense capability. |
Compared with LMV331M5X/NOPB and TLV3701DBVR, TS391IYLT uniquely combines AEC-Q100 qualification, true ground-sensing on single supply, and 2–36 V operation - making it irreplaceable in automotive battery monitoring and industrial 24 V sensor interfaces where input referencing and supply flexibility are non-negotiable.
Availability
TS391IYLT is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and portable safety devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS391IYLT 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, analog ICs, MEMS, and power devices for automotive, industrial, and consumer markets.
The TS391 series belongs to ST's precision analog comparators product line, engineered specifically for robust, low-power threshold detection in automotive and industrial environments where ground-referenced sensing and wide supply tolerance are critical.
FAQ
Can TS391IYLT operate with input voltages below ground?
No. The absolute minimum input voltage is −0.3 V relative to VCC− (ground in single-supply use). Inputs must stay within −0.3 V to (VCC+ − 1.5 V) to ensure proper operation and avoid damage. This allows ground-referenced sensing but prohibits true negative input swing.
Does TS391IYLT require an external pull-up resistor on the output?
Yes. The output is open-collector and must be pulled up to a defined logic-high voltage (e.g., 3.3 V or 5 V) via an external resistor. Typical values range from 4.7 kΩ to 10 kΩ depending on rise time and bus loading requirements.
What is the maximum output sink current at 125 °C?
At +125 °C, the output sink current remains rated at 6 mA minimum (per Table 3, "Isink" parameter with temperature range condition), ensuring reliable drive capability in under-hood automotive environments without derating.
How does TS391IYLT differ from standard TS391ILT?
TS391IYLT is the automotive-grade variant: qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C), shipped in tape-and-reel with K510 marking, and subjected to additional screening including advanced ESD testing and lot traceability - unlike the commercial-grade TS391ILT (K511 marking, −40 °C to +85 °C).
TS391IYLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SC-74A, SOT-753
- 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
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 1.25mA
- 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
TS391IYLT FAQ
1.How can I place an order for TS391IYLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS391IYLT 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 TS391IYLT reliable?
The price and inventory of TS391IYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS391IYLT is usually 5 days.
3.What payment methods are accepted for TS391IYLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS391IYLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS391IYLT?
TS391IYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS391IYLT 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 TS391IYLT?
For technical support, including TS391IYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS391IYLT requirements.
6.How does Aetrix verify that TS391IYLT is sourced from the original manufacturer or authorized distributors?
All TS391IYLT 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 TS391IYLT meets industry standards.
7.What is the process for return or replacement of TS391IYLT?
All TS391IYLT units undergo pre-shipment inspection (PSI). If there is an issue with TS391IYLT, 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 TS391IYLT part is unused and in its original packaging.
Return procedure for TS391IYLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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