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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

STMicroelectronics TS374CD

Name: TS374CD
Brand: STMicroelectronics
SKU: TS374CD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS374CD

Manufacturer:: STMicroelectronics

Category:: Comparators

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TS374CD.pdf

Description:: IC COMPARATOR 4 DIFF 14SO

Quantity:: RFQ Add To RFQ list

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Inventory:3,108

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Product details

Overview

TS374CD from STMicroelectronics is a quad CMOS voltage comparator with rail-to-rail input (including ground), 200 ns typical response time, 1 pA typical input bias current, 0.1 mA supply current per comparator, and TTL/MOS/CMOS-compatible outputs-used in precision threshold detection in battery-powered instrumentation and sensor interface circuits.

For engineers reviewing the TS374CD datasheet, TS374CD pinout, TS374CD application, or TS374CD equivalent, key selection criteria include input offset voltage (≤12 mV), common-mode range (0 V to V_CC−2 V), low-power operation (250 µA/comparator max), and SO14 package compatibility with space-constrained PCB layouts.

Technical Context

The TS374CD implements four independent high-impedance CMOS comparators using ST's silicon-gate lin MOS process, enabling single-supply operation from 3 V to 16 V or dual supplies of ±1.5 V to ±8 V. Its input stage supports common-mode voltages down to ground, eliminating level-shifting needs in low-side sensing.

Each comparator delivers fast 200 ns propagation delay under TTL-level step excitation with 5.1 kΩ load and 15 pF capacitance, while maintaining low output saturation voltage (100–700 mV at 4 mA sink) and high open-circuit output impedance (>10¹² Ω).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 16 V single supply or ±1.5 V to ±8 V dual supply - enables direct interfacing with 3.3 V, 5 V, and 12 V systems without regulation.
Input Offset Voltage	2 mV (min), 10 mV (typ), 12 mV (max) - determines minimum detectable differential signal in precision zero-crossing or window detection.
Input Bias Current	1 pA (typ) - permits use with high-impedance sources (e.g., photodiodes, pH electrodes) without significant error.
Response Time	200 ns (typ) for TTL-level input step - supports real-time monitoring of fast transients in motor control feedback or pulse-width discrimination.
Output Saturation Voltage	100 mV (min), 400 mV (typ), 700 mV (max) at 4 mA sink - ensures reliable logic-low recognition by 5 V TTL and 3.3 V CMOS receivers.
Common-Mode Input Range	0 V to V_CC−2 V - allows direct connection to grounded sensors or shunt resistors without external biasing networks.
Supply Current per Comparator	150 µA (min), 250 µA (typ), 350 µA (max) - supports multi-comparator designs in energy-harvesting or coin-cell-powered devices.

Pinout & Package

TS374CD is housed in a 14-pin SO (Small Outline) plastic micropackage (SO14), measuring 8.55–8.75 mm × 5.8–6.2 mm × 1.75 mm height, with 1.27 mm lead pitch and gull-wing terminations suitable for reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input, Comp 1	Accepts reference or inverted signal path for first comparator; referenced to ground or system common.
2	Non-inverting Input, Comp 1	Receives sensed signal (e.g., from thermistor divider); supports rail-to-rail common-mode range.
3	Output, Comp 1	Open-drain compatible CMOS/TTL output; sinks up to 6 mA, requires external pull-up for high-level assertion.
4	V_CC− (GND)	Ground reference for single-supply operation; connects to system 0 V plane with low-inductance path.
5	Non-inverting Input, Comp 2	Second comparator input; electrically isolated from others-enables independent threshold setting.
6	Inverting Input, Comp 2	Paired with Pin 5 for differential comparison; shares same input specs (1 pA bias, rail-to-rail range).
7	Output, Comp 2	Independent digital output; drives LED indicators, microcontroller GPIO, or latch inputs directly.
8	V_CC+	Positive supply terminal; decoupling capacitor (100 nF ceramic) required within 5 mm for noise immunity.
9	Inverting Input, Comp 3	Third comparator input; layout symmetry recommended to match trace lengths with Pin 10 for matched propagation delay.
10	Non-inverting Input, Comp 3	Supports high-impedance source connection; no internal hysteresis-external resistor network needed for noise rejection.
11	Output, Comp 3	Active-low output; compatible with standard logic families without level translation.
12	Non-inverting Input, Comp 4	Fourth comparator input; usable as window comparator upper threshold when paired with Pin 13.
13	Inverting Input, Comp 4	Paired with Pin 12 for window or over/under-voltage detection; identical electrical specs to other inputs.
14	Output, Comp 4	Final comparator output; routed separately to avoid crosstalk with analog-sensitive traces.

Key Features

Feature	Design Value
Rail-to-rail input common-mode range including GND	Enables direct sensing of signals referenced to ground-eliminates need for input biasing resistors in shunt-current monitoring.
1 pA typical input bias current	Preserves accuracy in high-source-impedance applications such as piezoelectric sensor interfaces or electrochemical cell monitoring.
200 ns typical response time	Supports detection of sub-microsecond events in pulse-width modulation feedback or overcurrent fault signaling.
0.1 mA supply current per comparator	Allows integration of four independent comparators in ultra-low-power systems with <1 mA total quiescent draw.
TTL/MOS/CMOS output compatibility	Drives standard logic families directly-no external buffer or level shifter required in mixed-voltage systems.

Applications

Battery Voltage Monitor

Sensor Threshold Detector

Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger cutoff at 2.5 V undervoltage and 4.3 V overvoltage thresholds.

IC Role / Device Role / Timing Role: Quad comparator configured as dual-window detector (Pins 1–3 and 12–14), comparing divided battery voltage against precision references.

Use Value: Enables accurate, low-quiescent-power protection without microcontroller intervention-extends standby time by >30% vs. active-sensing solutions.

Use Scenario: Detecting temperature crossing of 25 °C and 70 °C thresholds using NTC thermistor voltage dividers.

IC Role / Device Role / Timing Role: Two comparators (Pins 5–7 and 9–11) compare thermistor output against fixed reference voltages generated by resistor ladders.

Use Value: Provides immediate hardware-level thermal shutdown before firmware-based polling can respond-critical for fan control and power-stage safety.

Motor Stall Detection

Optical Pulse Discriminator

Use Scenario: Identifying stalled DC motor condition by detecting sustained current rise above 1.2 A via shunt resistor voltage.

IC Role / Device Role / Timing Role: Single comparator (Pins 1–3) compares amplified shunt voltage to adjustable threshold; output triggers PWM disable.

Use Value: Responds within 300 ns to stall onset-prevents coil overheating and driver FET failure before thermal protection activates.

Use Scenario: Filtering ambient light noise from IR receiver pulses by rejecting signals below 2.5 V peak amplitude and <10 µs duration.

IC Role / Device Role / Timing Role: Cascaded comparators (Pins 5–7 → Pins 12–14) implement amplitude and timing discrimination using RC-delayed enable.

Use Value: Achieves >60 dB ambient rejection ratio with <200 ns jitter-enables reliable IR remote decoding in daylight conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad CMOS voltage comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM339DR	Bipolar input (250 nA bias current), wider supply range (2–36 V), slower response (1.3 µs), higher supply current (0.8 mA/comparator)	Less suitable for high-impedance sensor interfaces but more robust in industrial 24 V systems with EMI	Select when interfacing with 24 V PLC I/O or where input overvoltage tolerance >±36 V is required.
TLV3704IDR	CMOS input (1 pA bias), rail-to-rail input/output, lower supply current (80 µA/comparator), faster response (120 ns), narrower supply (2.7–16 V)	Better for ultra-low-power and high-speed applications but lacks extended temperature grade (-40°C to +125°C only)	Select when optimizing for sub-100 µA total quiescent current or sub-200 ns timing-critical edge detection.

Compared with LM339DR and TLV3704IDR, TS374CD offers the best balance of ultra-low input bias current, ground-sensing capability, and industrial temperature support (0°C to +70°C), making it optimal for cost-sensitive, battery-operated instrumentation requiring four independent comparators in SO14.

Availability

TS374CD is available at Aetrix Electronics and suitable for battery voltage monitoring, sensor threshold detection, motor stall protection, and optical pulse discrimination requiring stable component supply across industrial and consumer design cycles.

Supply support for TS374CD 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, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The TS374 series belongs to ST's precision analog comparators product line, engineered specifically for low-power, high-input-impedance sensing applications where ground-referenced input operation and fast response are essential.

FAQ

Can TS374CD operate from a single 3.3 V supply?

Yes. TS374CD supports single-supply operation from 3 V to 16 V. At 3.3 V, its input common-mode range extends from 0 V to 1.3 V (V_CC−2 V), and output low saturation remains ≤400 mV at 4 mA sink-ensuring reliable logic-low assertion into 3.3 V CMOS inputs.

Does TS374CD include internal hysteresis?

No. TS374CD has no internal hysteresis. External positive feedback (e.g., 10 MΩ resistor from output to non-inverting input) must be added to prevent oscillation when comparing slowly varying or noisy signals near the threshold.

What is the maximum capacitive load the TS374CD output can drive?

TS374CD output is specified with CL = 15 pF in switching tests. Driving >50 pF may increase propagation delay beyond 200 ns and cause ringing; for loads >30 pF, add a 50 Ω series resistor adjacent to the output pin to dampen reflections.

Is TS374CD pin-compatible with TS374CN (DIP-14)?

Yes-both share identical pin numbering and electrical specifications. The only difference is package: TS374CD uses SO14 (surface-mount), TS374CN uses DIP14 (through-hole). Layout adaptation is required for footprint, but schematic design and net connectivity remain unchanged.

TS374CD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: Differential

Number of Elements:: 4

Output Type:: CMOS, MOS, Open-Drain, TTL

Voltage - Supply, Single/Dual (±):: 3V ~ 16V, ±1.5V ~ 8V

:: 10mV @ 5V

Voltage - Input Offset (Max):: 1pA @ 5V

Current - Input Bias (Max):: 20mA

Current - Output (Typ):: 250µA

Current - Quiescent (Max):: -

CMRR, PSRR (Typ):: -

Propagation Delay (Max):: -

Hysteresis:: 0°C ~ 70°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 14-SO

TS374CD FAQ

1.How can I place an order for TS374CD through Aetrix?

Please submit a Request for Quotation (RFQ) for TS374CD 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 TS374CD reliable?

The price and inventory of TS374CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS374CD is usually 5 days.

3.What payment methods are accepted for TS374CD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS374CD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS374CD?

TS374CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS374CD 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 TS374CD?

For technical support, including TS374CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS374CD requirements.

6.How does Aetrix verify that TS374CD is sourced from the original manufacturer or authorized distributors?

All TS374CD 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 TS374CD meets industry standards.

7.What is the process for return or replacement of TS374CD?

All TS374CD units undergo pre-shipment inspection (PSI). If there is an issue with TS374CD, 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 TS374CD part is unused and in its original packaging.

Return procedure for TS374CD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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