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STMicroelectronics TS3702IDT
- Part No.:
- TS3702IDT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS3702IDT.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:17,729
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Product details
Overview
TS3702IDT from STMicroelectronics is a micropower dual CMOS voltage comparator with push-pull outputs, 9 μA typical supply current per comparator, 2.7–16 V single-supply operation, and 1 pA typical input bias current. It replaces bipolar LM393 in battery-powered sensor monitoring circuits where low quiescent current and rail-to-rail input capability down to GND are critical.
For engineers reviewing the TS3702IDT datasheet, TS3702IDT pinout, TS3702IDT application, or TS3702IDT equivalent, key selection criteria include micropower consumption (<10 μA/comparator), push-pull output eliminating pull-up resistors, input common-mode range extending to ground, and functional compatibility with LM393 in space-constrained industrial sensing nodes.
Technical Context
The TS3702IDT integrates two independent high-impedance (10¹² Ω typ) CMOS comparators on a single die, each featuring differential inputs with 1 pA typ offset current and 5–6.5 mV max input offset voltage at 25 °C. Its push-pull output stage drives logic-level loads directly without external components.
It operates across wide supply ranges (2.7–16 V single or ±1.35–±8 V dual), supports input common-mode voltages from GND to VCC−1.5 V, and delivers 2 μs typical response time with 5 mV overdrive - matching LM393 speed while cutting supply current by 20×.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply current | 9 μA typ per comparator - enables multi-year battery life in always-on IoT sensors |
| Input bias current | 1 pA typ - preserves signal integrity in high-impedance source applications (e.g., photodiode amps) |
| Input offset voltage | 5–6.5 mV max - sufficient for threshold detection in 3.3 V or 5 V logic-level systems |
| Response time | 2 μs typ @ 5 mV overdrive - supports fast edge detection in pulse-width monitoring |
| Common-mode range | 0 V to VCC−1.5 V - allows direct interfacing to ground-referenced signals without level-shifting |
| Output type | CMOS push-pull - eliminates need for external pull-up resistors, saving PCB area and BOM cost |
| ESD rating | HBM 400 V, CDM 1.5 kV - meets basic handling robustness for industrial assembly environments |
Pinout & Package
TS3702IDT is supplied in an SO8 (Small Outline 8-pin) plastic micropackage, RoHS-compliant and ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input 1 | Differential input for comparator 1; accepts signals from 0 V to VCC−1.5 V |
| 2 | Non-inverting Input 1 | Differential input for comparator 1; same common-mode range as Pin 1 |
| 3 | Output 1 | CMOS push-pull output; sinks or sources up to 4 mA, logic-compatible with 3.3 V/5 V systems |
| 4 | VCC− / GND | Negative supply terminal (GND in single-supply mode); reference for all inputs and outputs |
| 5 | Non-inverting Input 2 | Differential input for comparator 2; electrically identical to Pin 2 |
| 6 | Inverting Input 2 | Differential input for comparator 2; electrically identical to Pin 1 |
| 7 | Output 2 | CMOS push-pull output; independent of Output 1, supports dual-threshold detection |
| 8 | VCC+ | Positive supply terminal; supports 2.7–16 V operation; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 9 μA/comparator typical - extends battery life in portable gas detectors and wearable health monitors |
| Rail-to-rail input (to GND) | Input common-mode includes 0 V - enables direct connection to current-sense resistors and thermistor dividers |
| Push-pull CMOS output | No external pull-up needed - reduces component count and layout complexity in compact PLC I/O modules |
| LM393 pin/function compatibility | Drop-in replacement with identical pinout and logic behavior - simplifies legacy design upgrades |
| High input impedance | 10¹² Ω typical - prevents loading of high-Z sensor outputs like piezoelectric accelerometers |
Applications
| Smoke Detector Threshold Sensing | Portable Battery Voltage Monitor |
|---|---|
|
Use Scenario: Dual-comparator circuit detects smoke chamber opacity changes and battery undervoltage simultaneously in standalone residential alarms. IC Role / Device Role / Timing Role: Comparator 1 compares photodiode output against adjustable smoke threshold; Comparator 2 monitors battery voltage against 3.0 V cutoff. Use Value: Micropower operation ensures >5 years of operation on AA batteries; push-pull outputs drive LEDs directly without discrete transistors. |
Use Scenario: Real-time monitoring of Li-ion cell voltage during charging/discharging in handheld medical devices. IC Role / Device Role / Timing Role: Comparator 1 triggers low-voltage warning at 3.2 V; Comparator 2 initiates shutdown at 2.8 V, both referenced to precision voltage divider. Use Value: Input bias current <1 pA avoids error in high-resistance divider networks; GND-referenced input allows direct connection to cell negative terminal. |
| Industrial Temperature Controller | Smart Flow Meter Zero Calibration |
|
Use Scenario: Dual-setpoint control of heating element based on RTD feedback in HVAC actuators. IC Role / Device Role / Timing Role: Comparator 1 activates heater above lower setpoint (e.g., 20 °C); Comparator 2 deactivates it below upper setpoint (e.g., 22 °C), implementing hysteresis. Use Value: 5 mV offset voltage ensures stable switching within ±0.1 °C accuracy over temperature; wide supply range accommodates 12 V field power rails. |
Use Scenario: Automatic zero-offset compensation during flow meter startup using differential pressure sensor output. IC Role / Device Role / Timing Role: Comparator 1 detects when sensor output settles within ±10 μV of zero; Comparator 2 validates stable power rail before enabling ADC calibration sequence. Use Value: 1 pA input bias current prevents drift in femtoamp-level bridge bias networks; 2 μs response enables sub-millisecond zero-check timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Bipolar input stage; 1.2 mA supply current per comparator; open-collector output requiring pull-up resistor | Higher power draw limits use in battery systems; slower response (~1.3 μs min) but higher noise immunity | Select when cost sensitivity outweighs power budget and board space constraints |
| TLV3702IDR | Lower offset (1.5 mV max); rail-to-rail output swing; 1 μA supply current; same SO8 package | Superior precision and lower power, but narrower supply range (1.8–16 V) and reduced ESD robustness (HBM 2 kV) | Prefer for ultra-low-power, high-accuracy designs where 1.8 V start-up is required and ESD environment is controlled |
Compared with LM393DR and TLV3702IDR, TS3702IDT uniquely balances ultra-low power (9 μA), GND-referenced input, push-pull output, and proven industrial ESD robustness - making it optimal for cost-sensitive, long-life industrial sensor nodes where LM393 compatibility eases migration.
Availability
TS3702IDT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart building controllers requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for TS3702IDT 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.
The TS3702 belongs to ST's precision analog comparators product line, engineered specifically for micropower, high-input-impedance sensing applications in battery-operated and space-constrained industrial equipment.
FAQ
Can TS3702IDT operate from a 2.7 V single supply?
Yes. The TS3702IDT is fully specified for single-supply operation from 2.7 V to 16 V, with guaranteed performance including input common-mode range down to GND and output swing within 300 mV of rails at 2.7 V. Electrical characteristics tables confirm functionality at VCC = 3 V.
Does TS3702IDT require external pull-up resistors on its outputs?
No. Unlike open-collector comparators such as LM393, TS3702IDT features a CMOS push-pull output stage capable of actively driving both high and low logic states. This eliminates the need for external pull-up resistors, reducing component count and PCB footprint.
What is the maximum input common-mode voltage for TS3702IDT at 5 V supply?
At VCC = 5 V, the input common-mode voltage range is specified as 0 V to VCC−1.5 V, i.e., 0 V to 3.5 V. This allows direct interfacing with 0–3.3 V sensor outputs and reference voltages without level-shifting circuitry.
Is TS3702IDT pin-compatible with LM393 in SO8 packages?
Yes. TS3702IDT uses the same SO8 pinout as LM393 (e.g., LM393DR), with identical assignments for inputs, outputs, and supply pins. Functional compatibility is confirmed in the datasheet, enabling drop-in replacement in existing layouts without redesign.
TS3702IDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, Push-Pull
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 16V, ±1.35V ~ 8V
- :
- 5mV @ 10V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 25µA
- Current - Quiescent (Max):
- 82dB CMRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TS3702IDT FAQ
1.How can I place an order for TS3702IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS3702IDT 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 TS3702IDT reliable?
The price and inventory of TS3702IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS3702IDT is usually 5 days.
3.What payment methods are accepted for TS3702IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS3702IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS3702IDT?
TS3702IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS3702IDT 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 TS3702IDT?
For technical support, including TS3702IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS3702IDT requirements.
6.How does Aetrix verify that TS3702IDT is sourced from the original manufacturer or authorized distributors?
All TS3702IDT 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 TS3702IDT meets industry standards.
7.What is the process for return or replacement of TS3702IDT?
All TS3702IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS3702IDT, 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 TS3702IDT part is unused and in its original packaging.
Return procedure for TS3702IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS3702IDT Tags
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