Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TSX561ILT

Name: TSX561ILT
Brand: STMicroelectronics
SKU: TSX561ILT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TSX561ILT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: TSX561ILT.pdf

Description:: IC CMOS 1 CIRCUIT SOT23-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,575

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TSX561ILT from STMicroelectronics is a single-channel, micropower, rail-to-rail input CMOS operational amplifier optimized for high-impedance sensor interfaces and industrial signal conditioning. It delivers 900 kHz gain bandwidth product at 235 µA supply current (5 V), 600 µV max input offset voltage (A-grade), 1 pA typical input bias current, and operates across 3 V to 16 V supply with -40 °C to 125 °C temperature range - enabling precision analog front-ends in automotive engine control units.

For engineers reviewing the TSX561ILT datasheet, TSX561ILT pinout, TSX561ILT application, or TSX561ILT equivalent, key selection criteria include its low-voltage rail-to-rail input stage (V_IN = V_CC– − 0.1 V to V_CC+ + 0.1 V), 4 kV HBM ESD tolerance, 1.1 V/µs slew rate at 16 V, and guaranteed performance over extended temperature - critical for automotive sensor amplification and battery-powered instrumentation.

Technical Context

The TSX561ILT employs complementary PMOS/NMOS input differential pairs to achieve true rail-to-rail input operation, with full specification over common-mode range from (V_CC– − 0.1 V) to (V_CC+ − 1.5 V); beyond that, GBP and V_IO degrade but functionality remains. Its 16 V CMOS process enables stable DC accuracy (600 µV max V_IO at 25 °C) and low drift (2–12 µV/°C) across automotive temperature extremes.

It features internal compensation for unity-gain stability, 55° phase margin with 100 pF capacitive load, and rail-to-rail output swing limited only by quiescent current headroom. The device avoids phase reversal under overdrive and supports single-supply operation down to 3 V while maintaining 85 dB large-signal voltage gain and 76–95 dB CMRR at 16 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3 V to 16 V - supports direct interfacing with 3.3 V microcontrollers and 12 V automotive buses without level-shifting.
Gain Bandwidth Product	900 kHz typ. at 16 V - enables stable closed-loop gain ≥10 at 90 kHz for anti-aliasing filters and active sensor conditioning.
Input Offset Voltage	600 µV max (TSX561A grade) at 25 °C - ensures ≤0.06% error in 1 V full-scale bridge sensor outputs without trimming.
Input Bias Current	1 pA typ. - preserves signal integrity in >1 GΩ source impedance applications like pH electrodes and piezoelectric sensors.
Slew Rate	1.1 V/µs at 16 V - supports 100 kHz sine wave output at 2 V_PP without distortion in follower configurations.
ESD Tolerance	4 kV HBM - eliminates need for external protection diodes in exposed automotive sensor harnesses.
Operating Temperature	-40 °C to 125 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood engine control modules.

Pinout & Package

SOT23-5 package: ultra-compact 2.9 mm × 1.6 mm × 1.1 mm footprint with exposed thermal pad (no internal connection), rated R_thJA = 250 °C/W, suited for space-constrained PCB layouts in automotive ECUs and portable medical devices.

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Output	Rail-to-rail voltage source capable of sourcing/sinking ≥11 mA at 5 V - drives 10 kΩ loads directly into ADC reference buffers.
2 (−IN)	Inverting Input	High-impedance node (1 pA bias) with rail-to-rail common-mode range - accepts signals from thermocouples or resistive sensors without attenuation.
3 (V−)	Negative Supply	Ground or negative rail connection; supports single-supply operation when tied to 0 V - enables 3 V–16 V system compatibility.
4 (+IN)	Non-inverting Input	Matched to −IN for <100 pA offset current - critical for precision instrumentation amplifier front-ends and differential sensing.
5 (V+)	Positive Supply	Power input with 18 V absolute maximum rating - allows 16 V nominal operation with 2 V safety margin against transients.

Key Features

Feature	Design Value
Rail-to-rail input stage	Common-mode range extends 0.1 V beyond rails - enables direct sensing of battery voltage or 4–20 mA loop signals without external level shifters.
Micropower operation	235 µA supply current at 5 V - reduces total system power by >50% vs. standard op-amps in always-on sensor nodes.
Automotive qualification	AEC-Q100 Grade 1 certified - validated for 15-year lifetime in 125 °C ambient environments like transmission control units.
Low-noise architecture	48 nV/√Hz input noise at 16 V - maintains SNR >80 dB for 1 kHz biomedical signals amplified 100× before ADC sampling.
Phase-reversal immunity	Guaranteed non-inverting response during input overdrive - prevents latch-up in motor current sense feedback paths.

Applications

Engine Coolant Temperature Sensing

Industrial Pressure Transducer Interface

Use Scenario: Amplifying low-level output (10–100 mV) from NTC thermistors embedded in engine coolant passages.

IC Role / Device Role / Timing Role: Precision non-inverting amplifier with 100× gain, configured for single-supply 5 V operation and rail-to-rail input to capture full 0–130 °C range.

Use Value: 600 µV max V_IO limits temperature error to ±0.6 °C at 100 °C, meeting OEM calibration requirements without software correction.

Use Scenario: Conditioning millivolt-level output from silicon piezoresistive pressure sensors in hydraulic control valves.

IC Role / Device Role / Timing Role: Instrumentation amplifier front-end buffer with 1 GΩ input impedance to prevent sensor loading and preserve linearity.

Use Value: 1 pA input bias current ensures <0.01% gain error on 100 kΩ sensor bridges, critical for ISO 13849 functional safety compliance.

Portable ECG Signal Acquisition

Automotive Battery Monitoring Unit

Use Scenario: Amplifying 0.5–2 mV biopotential signals from dry-electrode ECG leads in wearable monitors.

IC Role / Device Role / Timing Role: Low-noise, low-power preamplifier stage with 55 nV/√Hz noise density and 3 V supply operation.

Use Value: 15 µV_PP integrated 0.1–10 Hz noise enables ≥90 dB SNR for diagnostic-quality waveform capture on coin-cell batteries.

Use Scenario: Measuring cell voltage (2.5–4.2 V) and pack current via shunt resistor in 12 V lead-acid battery management systems.

IC Role / Device Role / Timing Role: High-CMRR difference amplifier (84 dB min at 5 V) rejecting common-mode ripple from alternator switching noise.

Use Value: 84 dB CMRR suppresses 100 mV alternator ripple to <0.4 mV error - sufficient for ±5 mV SoC estimation accuracy.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision micropower op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSX561IYLT	Same die, DFN8 2×2 mm package (R_thJA = 120 °C/W vs. SOT23-5's 250 °C/W) - 45% lower thermal resistance.	Better suited for high-density automotive modules where board space and thermal dissipation are constrained.	Select when PCB layout allows 2×2 mm footprint and junction temperature must stay <110 °C at 125 °C ambient.
LMV321IDBVR	Lower GBP (1 MHz), higher I_CC (80 µA @ 5 V), no A-grade V_IO option - 1 mV max V_IO only, no 125 °C rating.	Targeted at cost-sensitive consumer electronics, not automotive or industrial harsh environments.	Use only in non-automotive, commercial-temp applications where 1 mV V_IO and 85 °C max operating temperature are acceptable.

Compared with TSX561ILT, TSX561IYLT offers superior thermal performance in compact layouts but requires rework of solder stencil and test fixtures; LMV321IDBVR trades automotive reliability and precision for lower unit cost and wider distributor availability in non-critical applications.

Availability

TSX561ILT is available at Aetrix Electronics and suitable for automotive engine control units, industrial pressure transducers, portable medical ECG monitors, and battery monitoring systems requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for TSX561ILT 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 TSX56x series belongs to ST's precision analog portfolio, engineered specifically for high-accuracy, low-power signal conditioning in automotive and industrial environments where extended temperature operation and rail-to-rail performance are mandatory.

FAQ

What is the maximum capacitive load the TSX561ILT can drive while maintaining stability?

The TSX561ILT maintains ≥55° phase margin with up to 100 pF capacitive load at 12 V supply, as verified in Figure 13 of the datasheet. Driving >100 pF requires external isolation resistor (≥100 Ω) between output and load to prevent peaking or oscillation - critical for driving ADC input capacitance or long PCB traces in automotive harnesses.

Does the TSX561ILT support true rail-to-rail output swing?

No - the TSX561ILT features rail-to-rail *input* only. Its output swings to within 70 mV of each rail (V_OH/V_OL = 70 mV max at 25 °C), limiting full-scale dynamic range to ~15.86 V on a 16 V supply. This is sufficient for driving SAR ADC references but requires headroom consideration in 12-bit+ systems.

How does the input offset voltage drift behave over temperature?

V_IO drift is specified as 2–12 µV/°C over −40 °C to 125 °C, with typical distribution centered near 5 µV/°C (Figure 4). At 125 °C, max V_IO rises to 1800 µV for TSX561A - a 1200 µV increase from 25 °C baseline - which must be factored into worst-case error budgets for closed-loop sensor systems.

Can the TSX561ILT operate from a 3.3 V supply while maintaining full AC performance?

Yes - GBP drops to 600–800 kHz at 3.3 V (Table 4), but remains fully specified and stable. Slew rate decreases to 1 V/µs, and output current capability reduces to 4.3 mA sink/3.3 mA source, yet all DC parameters including V_IO, CMRR, and I_IB retain full grade-A specifications - making it viable for low-voltage IoT sensor nodes.

TSX561ILT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: CMOS

Number of Circuits:: 1

Output Type:: -

Slew Rate:: 1.1V/µs

Gain Bandwidth Product:: 900 kHz

-3db Bandwidth:: -

Current - Input Bias:: 1 pA

Voltage - Input Offset:: 1 mV

Current - Supply:: 250µA

Current - Output / Channel:: 92 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 16 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TSX561ILT FAQ

1.How can I place an order for TSX561ILT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX561ILT 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 TSX561ILT reliable?

The price and inventory of TSX561ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX561ILT is usually 5 days.

3.What payment methods are accepted for TSX561ILT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX561ILT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX561ILT?

TSX561ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX561ILT 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 TSX561ILT?

For technical support, including TSX561ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX561ILT requirements.

6.How does Aetrix verify that TSX561ILT is sourced from the original manufacturer or authorized distributors?

All TSX561ILT 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 TSX561ILT meets industry standards.

7.What is the process for return or replacement of TSX561ILT?

All TSX561ILT units undergo pre-shipment inspection (PSI). If there is an issue with TSX561ILT, 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 TSX561ILT part is unused and in its original packaging.

Return procedure for TSX561ILT:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…