My Inquiry
My Account
STMicroelectronics TS3702CDT
- Part No.:
- TS3702CDT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS3702CDT.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:14,103
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS3702CDT 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 (including GND) are critical.
For engineers reviewing the TS3702CDT datasheet, TS3702CDT pinout, TS3702CDT application, or TS3702CDT equivalent, key selection criteria include micropower consumption (<10 μA/comparator), push-pull output eliminating external pull-ups, input common-mode range extending to ground, and compatibility with LM393 footprint and function in space-constrained industrial sensing nodes.
Technical Context
The TS3702CDT integrates two independent high-impedance CMOS comparators sharing a common supply domain. Its input stage uses MOSFETs to achieve 10¹² Ω typical input impedance and 1 pA bias/offset currents, enabling direct interfacing with high-impedance sources like thermistors or photodiodes without loading error.
Each comparator features a rail-compatible push-pull output stage delivering VOH ≥ 2.4 V and VOL ≤ 575 mV at 4 mA load under 3 V supply, with 2 μs typical response time for 5 mV overdrive - matching LM393 speed while reducing board area and BOM count by removing pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 9 μA typ per comparator - enables multi-year operation on coin-cell batteries in wireless sensor nodes |
| Input Bias Current | 1 pA typ - preserves signal integrity when sensing from megaohm-level resistive dividers or piezoelectric elements |
| Input Common-Mode Range | 0 V to VCC−1.5 V - supports ground-referenced inputs without level-shifting circuitry |
| Response Time | 2 μs typ (5 mV overdrive) - sufficient for 100 kHz threshold-detection loops in motor control feedback |
| Output Type | CMOS push-pull - eliminates need for external 4.7–10 kΩ pull-up resistors, saving PCB area and power |
| Supply Voltage Range | 2.7–16 V single or ±1.35–±8 V dual - interoperable across 3.3 V microcontrollers and 12 V industrial rails |
| Input Offset Voltage | 6.5 mV max - sets minimum detectable differential for precision analog thresholding |
Pinout & Package
TS3702CDT is supplied in an SO8 (Small Outline 8-pin) plastic micropackage, RoHS-compliant and ECOPACK® certified, with 1.27 mm lead pitch and 4.8–5.0 mm body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input 1 | Differential input node for comparator A; accepts signals down to GND |
| 2 | Non-inverting Input 1 | Differential input node for comparator A; supports rail-to-rail common-mode range |
| 3 | Output 1 | CMOS push-pull output - drives high/low actively without external components |
| 4 | V− (GND) | Negative supply terminal; serves as reference for single-supply operation |
| 5 | Non-inverting Input 2 | Differential input node for comparator B; electrically isolated from channel A |
| 6 | Inverting Input 2 | Differential input node for comparator B; shares same supply domain as channel A |
| 7 | Output 2 | CMOS push-pull output - independently controlled, no crosstalk with Output 1 |
| 8 | V+ | Positive supply terminal; supports up to 16 V DC or ±8 V dual supply |
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 including GND | 0 V to VCC−1.5 V common-mode range - enables direct interface with 0 V-referenced sensors (e.g., NTC thermistors) |
| Push-pull CMOS output | No external pull-up required - reduces component count and layout complexity in compact IoT edge nodes |
| High input impedance | 10¹² Ω typical - prevents loading of high-Z transducer outputs such as pH electrodes or capacitive touch sense lines |
| Fast response with low overdrive | 2 μs @ 5 mV overdrive - supports real-time fault detection in overvoltage/overcurrent protection circuits |
Applications
| Battery-Powered Sensor Interface | Industrial Threshold Detection |
|---|---|
Use Scenario: Monitoring temperature via NTC thermistor in a wireless environmental sensor node powered by CR2032. IC Role / Device Role / Timing Role: Dual comparator performs windowed voltage comparison against upper/lower thresholds to trigger BLE wake-up only on out-of-range events. Use Value: 9 μA total quiescent current (both channels) enables >5 years of operation on a single coin cell, with GND-referenced inputs eliminating level-shifters. | Use Scenario: Detecting overvoltage and undervoltage conditions on a 12 V DC rail in a programmable logic controller (PLC) I/O module. IC Role / Device Role / Timing Role: One comparator monitors high-side rail against 11.5 V reference; second monitors low-side against 10.2 V to flag brown-out or surge events. Use Value: Push-pull outputs drive PLC status LEDs directly; wide 2.7–16 V supply range ensures reliable operation across varying field power conditions. |
| Low-Power Analog Front-End | Replacement for LM393 in Legacy Designs |
Use Scenario: Signal conditioning in a portable ECG patch using dry electrodes with high source impedance (>1 MΩ). IC Role / Device Role / Timing Role: Comparator A detects R-wave amplitude crossing; Comparator B validates baseline stability before triggering ADC sampling. Use Value: 1 pA input bias current prevents electrode polarization drift; 10¹² Ω input impedance avoids attenuation of weak biopotential signals. | Use Scenario: Upgrading existing LM393-based smoke detector PCBs to extend battery life without layout changes. IC Role / Device Role / Timing Role: Pin-to-pin and functionally compatible drop-in replacement for dual comparator section, retaining identical resistor networks and output loads. Use Value: Identical SO8 footprint and LM393-compatible timing/response allows immediate BOM swap; 20× lower supply current doubles battery service interval. |
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; 500 μA supply current per comparator; open-collector output requiring pull-up | Higher power draw limits use in multi-year battery devices; requires external resistor network | Select when legacy design reuse or cost sensitivity outweighs micropower needs |
| TLV3702IDR | Lower 1.8–16 V supply range; 1 μA supply current; rail-to-rail input/output; smaller SOT-23-8 package | Superior power efficiency but lacks full 2.7 V startup; not pin-compatible with SO8 | Select for ultra-low-power designs where board re-layout is acceptable and sub-2.7 V operation is needed |
Compared with LM393DR and TLV3702IDR, TS3702CDT uniquely balances micropower (9 μA), SO8 pin compatibility, GND-inclusive input range, and push-pull output - making it optimal for retrofitting LM393 systems while achieving >95% quiescent current reduction without redesign.
Availability
TS3702CDT is available at Aetrix Electronics and suitable for battery-powered sensor interfaces, industrial threshold detection, low-power analog front-ends, and LM393 replacement projects requiring stable component supply and long-term manufacturability.
Supply support for TS3702CDT 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TS3702 belongs to ST's precision analog comparator product line, engineered specifically for energy-constrained applications demanding ultra-low supply current, high input impedance, and seamless LM393 interoperability in space-limited layouts.
FAQ
What is the maximum operating temperature for TS3702CDT?
The TS3702CDT is rated for industrial temperature range: −40 °C to +125 °C. This is confirmed in Table 2 of the official ST datasheet (Rev 3, Feb 2007), where "TS3702I" grade specifies this range, and "CDT" suffix denotes SO8 package with industrial-grade screening.
Does TS3702CDT require external pull-up resistors on its outputs?
No. TS3702CDT features CMOS push-pull outputs that actively drive both high and low states. Unlike open-collector comparators (e.g., LM393), it does not require external pull-up resistors - verified in the "Features" section and schematic diagram of the ST datasheet, which shows direct connection to load without pull-ups.
Can TS3702CDT operate from a 2.7 V single supply?
Yes. The absolute minimum single-supply voltage is 2.7 V, as specified in Table 2 ("Operating conditions") of the ST datasheet. At 2.7 V, electrical characteristics including response time (2 μs typ), output swing (VOH ≥ 2.4 V), and input offset (6.5 mV max) remain valid across the full industrial temperature range.
Is TS3702CDT pin-compatible with LM393 in SO8 packages?
Yes. The TS3702CDT uses identical SO8 pinout and functional mapping as LM393 - confirmed in the "Pin connections (Top view)" diagram and "Pin-to-pin and functionally compatible with bipolar LM393" statement in the ST datasheet. Both have In−/In+/Out/−VCC on pins 1–4 and +VCC/In+/In−/Out on pins 5–8.
TS3702CDT 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TS3702CDT FAQ
1.How can I place an order for TS3702CDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS3702CDT 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 TS3702CDT reliable?
The price and inventory of TS3702CDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS3702CDT is usually 5 days.
3.What payment methods are accepted for TS3702CDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS3702CDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS3702CDT?
TS3702CDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS3702CDT 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 TS3702CDT?
For technical support, including TS3702CDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS3702CDT requirements.
6.How does Aetrix verify that TS3702CDT is sourced from the original manufacturer or authorized distributors?
All TS3702CDT 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 TS3702CDT meets industry standards.
7.What is the process for return or replacement of TS3702CDT?
All TS3702CDT units undergo pre-shipment inspection (PSI). If there is an issue with TS3702CDT, 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 TS3702CDT part is unused and in its original packaging.
Return procedure for TS3702CDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS3702CDT Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
