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STMicroelectronics TS861AID
- Part No.:
- TS861AID
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS861AID.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
TS861AID from STMicroelectronics is a rail-to-rail, micropower BiCMOS single comparator operating from 2.7 V to 10 V with 6 µA supply current at 2.7 V, 500 ns propagation delay (100 mV overdrive), and push-pull output stage eliminating external pull-up resistors - deployed in battery-powered smoke detectors and portable communication systems.
For engineers reviewing the TS861AID datasheet, TS861AID pinout, TS861AID application, or TS861AID equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail CMOS input range, latch-up immunity (Class A), ESD protection (2 kV HBM), and compatibility with microcontroller I/O without level-shifting circuitry.
Technical Context
The TS861AID implements a BiCMOS input stage enabling rail-to-rail common-mode input voltage range (VCC−0.3 V to VCC+0.3 V) and low input offset voltage (3–10 mV max) across −40 °C to +85 °C. Its push-pull CMOS output delivers VOH = 2.35 V (ISOURCE = 2.5 mA) and VOL = 0.45 V (ISINK = 2.5 mA) at VCC = 2.7 V.
Propagation delay is load- and overdrive-dependent: TPLH/TPHL = 0.6/0.5 µs at 100 mV overdrive and CL = 50 pF (VCC = 2.7 V); delay increases to 1.5/1.5 µs at 10 mV overdrive. Supply current remains stable across VCC (2.7–10 V) and temperature, with ICC ≤ 14 µA per comparator at full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports single-cell Li-ion, dual-cell alkaline, and wide-input industrial rails without regulation. |
| Quiescent Current | 6 µA per comparator at 2.7 V - enables >1-year battery life in always-on smoke detectors with CR2032 cells. |
| Propagation Delay | 500 ns typical at 100 mV overdrive (VCC = 2.7 V, CL = 50 pF) - sufficient for fast threshold detection in gas alarm wake-up circuits. |
| Input Offset Voltage | 3–10 mV max (−40 °C to +85 °C) - ensures reliable trip-point accuracy in precision window comparators. |
| Output Type | Push-pull CMOS - directly interfaces to 1.8 V/3.3 V/5 V microcontrollers without pull-up resistors or level shifters. |
| ESD Protection | 2 kV HBM - meets IEC 61000-4-2 Level 2 for handheld device front-end robustness. |
| Latch-up Immunity | Class A per JEDEC JESD78 - prevents destructive latch-up during transient overvoltage events in portable systems. |
Pinout & Package
SOT23-5 and SO-8 packages available; TS861AID uses SO-8 (8-pin small outline) with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node referenced to internal bias; rail-to-rail CMOS input accepts signals from 0 V to VCC. |
| 2 | Non-inverting Input (+) | Differential input node referenced to internal bias; supports full supply-rail common-mode range. |
| 3 | Output | Push-pull CMOS output drives high/low actively; sinks/source up to 2.5 mA at 2.7 V without external components. |
| 4 | GND | Ground reference for input common-mode and output swing; requires low-impedance connection to system ground plane. |
| 5 | VCC | Positive supply rail; decoupling capacitor (100 nF) recommended within 5 mm of pin for noise immunity. |
| 6–8 | No Connect (NC) | Unbonded pins in SO-8 package; must remain floating - no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail CMOS inputs | Enables direct sensing of battery voltage, sensor outputs, or reference voltages spanning 0 V to VCC without attenuation or clamping. |
| Push-pull output stage | Eliminates need for external pull-up resistors, reducing BOM count and PCB area in space-constrained portable designs. |
| Ultra-low 6 µA supply current | Extends operational lifetime in coin-cell-powered devices such as wireless fire alarms where standby current dominates energy budget. |
| 500 ns response time (100 mV overdrive) | Supports rapid event detection in safety-critical applications like CO gas leak triggers requiring sub-millisecond latency. |
| Class A latch-up immunity | Guarantees immunity to destructive latch-up under transient overvoltage conditions common in battery disconnect/reconnect scenarios. |
Applications
| Smoke Detector Front-End | Portable Medical Sensor Interface |
|---|---|
|
Use Scenario: Detecting ionization chamber current thresholds indicating smoke presence in battery-operated residential alarms. IC Role / Device Role / Timing Role: Single comparator compares chamber current against precision reference; push-pull output asserts MCU interrupt line. Use Value: 6 µA quiescent current enables >2-year CR123A battery life in standby; rail-to-rail input accommodates low-level transducer signals near ground. |
Use Scenario: Monitoring analog output of wearable pulse oximeter photodiode amplifier for saturation detection. IC Role / Device Role / Timing Role: Threshold detector triggering alert when IR/Red signal ratio exceeds clinical limit; operates from 3.3 V LDO. Use Value: 500 ns propagation delay ensures timely response to sudden SpO₂ drop; ESD-hardened inputs survive handling in clinical environments. |
| Wireless Gas Monitor Wake-Up | Industrial Battery Management |
|
Use Scenario: Ultra-low-power wake-up circuit activating BLE radio when electrochemical gas sensor output crosses alarm threshold. IC Role / Device Role / Timing Role: Comparator monitors sensor output; output drives enable pin of PMIC or MCU reset controller. Use Value: Sub-µA effective system standby (comparator + disabled radio) achieved via direct interface and no pull-ups; Class A latch-up prevents field failure during ESD events. |
Use Scenario: Cell voltage monitoring in 4S Li-ion packs for overvoltage/undervoltage protection in portable power tools. IC Role / Device Role / Timing Role: Precision comparator compares scaled cell voltage against 2.5 V reference; output feeds protection ASIC or discrete FET gate driver. Use Value: 3–10 mV input offset ensures ±10 mV trip accuracy across temperature; 10 V max supply supports direct connection to pack voltage via resistor divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV331M5X | Higher supply current (12 µA typ), open-drain output requiring pull-up resistor, wider VCC range (2.7–5.5 V). | Less suitable for ultra-low-power battery systems due to higher ICC and added BOM complexity from pull-up. | Select TS861AID when minimizing standby current and simplifying layout are critical; LMV331M5X only if 5.5 V max supply suffices and open-drain logic is required. |
| TLV3691DBVR | Lower ICC (320 nA), but slower (6 µs propagation delay), rail-to-rail input only (not output), 1.8–5.5 V supply. | Better for nanowatt IoT sensors with relaxed timing; unsuitable for sub-microsecond detection or direct MCU interfacing. | Choose TS861AID for applications needing both micropower and speed; TLV3691DBVR only where <1 µA ICC outweighs latency and interface constraints. |
Compared with LMV331M5X and TLV3691DBVR, TS861AID uniquely balances 6 µA ICC, 500 ns speed, and push-pull output - making it optimal for battery-powered safety and portable systems demanding both longevity and responsiveness.
Availability
TS861AID is available at Aetrix Electronics and suitable for smoke/fire detection systems, portable medical monitors, wireless gas sensors, and industrial battery management requiring stable component supply across long production lifecycles.
Supply support for TS861AID 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The TS86x family targets ultra-low-power sensing and monitoring applications, specifically engineered to replace legacy bipolar comparators in battery-critical systems while maintaining rail-to-rail performance and robustness.
FAQ
What is the maximum operating temperature range for TS861AID?
The TS861AID is specified for operation from −40 °C to +85 °C ambient temperature. This range is guaranteed per Table 2 of the official datasheet (Doc ID 6422 Rev 3), and all electrical characteristics - including input offset voltage, propagation delay, and supply current - are validated across this full industrial temperature span.
Does TS861AID require external pull-up resistors on its output?
No. The TS861AID features a push-pull CMOS output stage capable of actively driving high (VOH ≥ 2.35 V at 2.7 V) and low (VOL ≤ 0.45 V at 2.7 V) without external components. This eliminates pull-up resistors, reduces power loss, and simplifies interface to 1.8 V–5 V microcontrollers.
Can TS861AID operate from a 1.8 V supply?
No. The absolute minimum supply voltage is 2.7 V per Table 1 (Absolute Maximum Ratings) and Table 2 (Operating Conditions). Operation below 2.7 V is not characterized or guaranteed; input common-mode range, output swing, and propagation delay degrade outside the 2.7–10 V specification.
What is the meaning of "Class A" latch-up immunity for TS861AID?
Class A latch-up immunity means the device complies with JEDEC JESD78 requirements for latch-up immunity up to ±100 mA injected current on any pin, with no functional interruption or parametric degradation. This ensures robustness during board-level ESD events and transient overvoltage conditions in portable equipment.
TS861AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 10V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 300pA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 16µA
- Current - Quiescent (Max):
- 70dB CMRR
- CMRR, PSRR (Typ):
- 2µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TS861AID FAQ
1.How can I place an order for TS861AID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS861AID 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 TS861AID reliable?
The price and inventory of TS861AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS861AID is usually 5 days.
3.What payment methods are accepted for TS861AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS861AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS861AID?
TS861AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS861AID 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 TS861AID?
For technical support, including TS861AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS861AID requirements.
6.How does Aetrix verify that TS861AID is sourced from the original manufacturer or authorized distributors?
All TS861AID 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 TS861AID meets industry standards.
7.What is the process for return or replacement of TS861AID?
All TS861AID units undergo pre-shipment inspection (PSI). If there is an issue with TS861AID, 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 TS861AID part is unused and in its original packaging.
Return procedure for TS861AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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