TSU101RILT Equivalent & Substitute Parts

Part Overview

The TSU101RILT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in a SOT-23-5 surface mount package. This rail-to-rail output amplifier operates across a 1.5 V to 5.5 V supply range and is designed for low-power applications requiring minimal input bias current. The device is actively produced and ROHS3 compliant, making it suitable for modern electronic designs.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation with alternative electrical characteristics within acceptable parameters. The parts listed below maintain functional compatibility through matching package types, output configurations, and supply voltage ranges while offering variations in performance metrics.

Key Parameters

Parameter	TSU101RILT
Manufacturer	STMicroelectronics
Amplifier Type	General Purpose
Number of Circuits	1
Output Type	Rail-to-Rail
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	1.5 V
Voltage - Supply Span (Max)	5.5 V
Operating Temperature	-40°C ~ 85°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TSU101RILT is determined by the following criteria:

Primary Compatibility Requirements:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Mounting Type: Surface Mount
Package compatibility: SOT-23-5 or equivalent footprint

Electrical Operating Range:

Supply voltage overlap within 1.5 V to 5.5 V range
Operating temperature range of -40°C minimum
Functional performance within general-purpose amplifier classification

Regulatory Compliance:

ROHS3 Compliant status
MSL rating of 1 (Unlimited)

The substitute parts listed below satisfy these primary requirements while offering different performance characteristics in slew rate, gain bandwidth product, input bias current, and supply current. These variations permit selection based on specific application demands without compromising core functionality or package compatibility.

Parameter Comparison

Parameter	TSU101RILT (STMicroelectronics)	LMV321Q1M5/NOPB (Texas Instruments)	NCS2003ASN2T1G (onsemi)
Amplifier Type	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate	0.003 V/µs	1 V/µs	12.5 V/µs
Gain Bandwidth Product	9 kHz	1 MHz	7 MHz
Current - Input Bias	5 pA	15 nA	1 pA
Voltage - Input Offset	3 mV	1.7 mV	500 µV
Current - Supply	650 nA	130 µA	300 µA
Current - Output / Channel	11 mA	Not specified	96 mA
Voltage - Supply Span (Min)	1.5 V	2.7 V	1.7 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SOT-23-5 Thin, TSOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

TSU101RILT (Primary Part)

The TSU101RILT remains the specified component for designs requiring ultra-low supply current consumption (650 nA) and minimal input bias current (5 pA). This device is appropriate for battery-powered or energy-harvesting applications where power dissipation is critical. The device is actively produced and ROHS3 compliant.

LMV321Q1M5/NOPB (Texas Instruments Substitute)

The LMV321Q1M5/NOPB provides improved performance metrics including higher slew rate (1 V/µs) and greater gain bandwidth product (1 MHz) compared to the TSU101RILT. This part carries AEC-Q100 automotive qualification and supports extended operating temperature to 125°C. The minimum supply voltage requirement increases to 2.7 V, which may restrict use in ultra-low voltage applications. This substitute is suitable for designs where higher bandwidth and automotive-grade reliability are required.

NCS2003ASN2T1G (onsemi Substitute)

The NCS2003ASN2T1G offers the highest performance specifications with slew rate of 12.5 V/µs and gain bandwidth product of 7 MHz. Input offset voltage is significantly reduced to 500 µV, and output current capability reaches 96 mA. The minimum supply voltage is 1.7 V, permitting operation in low-voltage systems. This substitute accommodates applications requiring higher speed and output drive capability. The package designation differs slightly (5-TSOP vs. SOT-23-5), though both are physically compatible SOT-23-5 form factors.

All three parts maintain ROHS3 compliance, MSL rating of 1, and active product status.

Frequently Asked Questions (FAQ)

Q: Can the LMV321Q1M5/NOPB directly replace the TSU101RILT in all applications?

A: Direct replacement is possible in designs operating at supply voltages of 2.7 V or higher. The LMV321Q1M5/NOPB requires minimum 2.7 V supply, whereas the TSU101RILT operates from 1.5 V. Applications using supply voltages between 1.5 V and 2.7 V require the TSU101RILT or NCS2003ASN2T1G. Electrical performance differs significantly; the LMV321Q1M5/NOPB provides higher bandwidth and lower input offset voltage.

Q: What are the package compatibility considerations between these parts?

A: The TSU101RILT and LMV321Q1M5/NOPB both use SC-74A/SOT-753 package designation with SOT-23-5 supplier device package. The NCS2003ASN2T1G uses SOT-23-5 Thin/TSOT-23-5 package designation with 5-TSOP supplier device package. All three parts are surface mount devices with compatible SOT-23-5 footprints suitable for standard PCB layouts.

Q: Which substitute is appropriate for low-power battery applications?

A: The TSU101RILT remains optimal for battery-powered designs due to its 650 nA supply current. The NCS2003ASN2T1G offers a compromise with 300 µA supply current while providing higher performance. The LMV321Q1M5/NOPB consumes 130 µA, making it less suitable for ultra-low-power applications but appropriate for systems where power consumption is secondary to performance.

Q: Are all three parts suitable for automotive applications?

A: The LMV321Q1M5/NOPB carries AEC-Q100 automotive qualification. The TSU101RILT and NCS2003ASN2T1G do not specify automotive qualification. For automotive-grade designs, the LMV321Q1M5/NOPB is the appropriate selection.

Q: What is the significance of the different slew rates among these parts?

A: Slew rate determines how quickly the output voltage can change. The TSU101RILT (0.003 V/µs) is suitable for low-frequency, precision applications. The LMV321Q1M5/NOPB (1 V/µs) accommodates mid-range frequency applications. The NCS2003ASN2T1G (12.5 V/µs) supports high-speed signal processing. Selection depends on the maximum frequency content of signals being amplified.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability requires verification that the substitute part's electrical characteristics remain within the design's tolerance margins. Minimum supply voltage requirements, slew rate, gain bandwidth product, and output current capability must be evaluated against circuit requirements. Physical package compatibility exists among all three parts, but electrical performance differences necessitate circuit analysis before substitution.

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