STMicroelectronics TSX561IYLT

Overview

TSX561IYLT from STMicroelectronics is a single-channel, micropower, rail-to-rail input CMOS operational amplifier optimized for high-impedance sensor interfaces and automotive signal conditioning. It delivers 900 kHz gain bandwidth at 250 µA supply current (16 V), 600 µV max offset voltage (A-grade), 1 pA typical input bias current, and operates across –40 °C to 125 °C - enabling precision analog front-ends in battery-powered industrial sensors and engine control modules.

For engineers reviewing the TSX561IYLT datasheet, TSX561IYLT pinout, TSX561IYLT application, or TSX561IYLT equivalent, this page provides verified electrical specifications, SOT23-5 package details, real-world use cases in harsh-environment signal chains, and validated alternative options for design flexibility and supply continuity.

Technical Context

The TSX561IYLT employs complementary PMOS/NMOS input differential pairs to achieve rail-to-rail input operation with common-mode range extended from (V_CC–) –0.1 V to (V_CC+) +0.1 V, though optimal performance (including <1 mV V_IO and ≥900 kHz GBP) is maintained within (V_CC–) –0.1 V to (V_CC+) –1.5 V. Its 16 V CMOS process enables low-noise (48 nV/√Hz @ 1 kHz) and high CMRR (95 dB typ. @ 16 V) while maintaining ESD robustness (4 kV HBM).

It features internal compensation for unity-gain stability, 1.1 V/µs slew rate, and guaranteed rail-to-rail output swing under 10 kΩ load. The device avoids phase reversal during overdrive and supports stable operation with 10 nF local decoupling - critical for noise-sensitive medical instrumentation and automotive body electronics.

Key Specifications

Pinout & Package

SOT23-5 package (2.9 mm × 1.6 mm × 1.1 mm), ECOPACK® compliant, surface-mountable with standard reflow profile. Pin 1 marked by dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar micropower, rail-to-rail input op-amp applications.

Compared with TSX561IYLT, TSX561ILT offers identical performance with logistics flexibility, while MCP6001T-E/OT trades precision and ESD robustness for lower unit cost - making it viable only where AEC-Q100 qualification and sub-millivolt offset are unnecessary.

Availability

TSX561IYLT is available at Aetrix Electronics and suitable for automotive engine control units, industrial pressure transducers, portable medical monitors, and cabin air quality sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX561IYLT 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 TSX56x series belongs to ST's precision analog portfolio, engineered specifically for high-accuracy, low-power signal conditioning in harsh environments - emphasizing rail-to-rail operation, automotive qualification, and sensor interface fidelity.

FAQ

Is TSX561IYLT pin-compatible with other SOT23-5 op-amps like LMV321?

No. TSX561IYLT uses standard SOT23-5 pinout (V_CC–, OUT, V_CC+, IN+, IN–), but LMV321 places V_CC+ and IN– swapped. Direct replacement risks incorrect biasing and oscillation. Always verify pin mapping against schematic symbols - ST's layout matches industry-standard "single op-amp" SOT23-5 convention.

Does TSX561IYLT support true rail-to-rail output swing?

Yes - output swings within 70 mV of both rails (V_CC– and V_CC+) under 10 kΩ load at 25 °C, degrading to 100 mV at temperature extremes. This enables full utilization of 3.3 V ADC references without level-shifting, critical for maximizing dynamic range in battery-powered systems.

What is the maximum capacitive load TSX561IYLT can drive stably?

Stable with ≤100 pF capacitive load per datasheet Figure 13. Driving >100 pF (e.g., long PCB traces or ADC input capacitance) requires isolation resistor (≥100 Ω) between output and load to maintain 55° phase margin. Uncompensated 500 pF loads cause peaking and potential oscillation.

Can TSX561IYLT be used in single-supply 3.3 V systems with AC-coupled inputs?

Yes - its rail-to-rail input accepts signals down to V_CC– –0.1 V (i.e., –0.1 V with 3.3 V supply), allowing AC coupling via series capacitor and DC bias network. However, for DC-coupled sensors, ensure common-mode voltage stays within (V_CC–) –0.1 V to (V_CC+) –1.5 V to retain specified GBP and V_IO.