TSV851AIYLT Equivalent & Substitute Parts

Part Overview

The TSV851AIYLT is a general-purpose operational amplifier manufactured by STMicroelectronics in a SOT-23-5 surface mount package. This rail-to-rail amplifier is designed for low-power applications requiring single-circuit amplification across a 2.5 V to 5.5 V supply range. The device is qualified to AEC-Q100 automotive standards and operates across an extended temperature range of -40°C to 125°C. Identification of equivalent and substitute parts is necessary to address supply chain requirements, inventory optimization, and design flexibility while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	0.7	V/µs
Gain Bandwidth Product	1.3	MHz
Current - Input Bias	27	nA
Voltage - Input Offset	800	µV
Current - Supply	130	µA
Current - Output / Channel	70	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TSV851AIYLT is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Single-circuit general-purpose amplifier topology
Rail-to-rail output capability
Supply voltage range: minimum 2.5 V, maximum 5.5 V
Operating temperature range: -40°C to 125°C (automotive grade requirement)
Gain bandwidth product: 1.3 MHz (primary performance metric)
Slew rate: 0.7 V/µs (signal fidelity requirement)
Input bias current: 27 nA (input impedance characteristic)
Input offset voltage: 800 µV (DC accuracy specification)
Supply current: 130 µA (power consumption baseline)
Output current per channel: 70 mA (load drive capability)

Mechanical Compatibility Criteria:

Surface mount technology
SOT-23-5 package footprint (SC-74A, SOT-753 case designation)
Tape & Reel (TR) or Cut Tape (CT) packaging formats

Compliance Requirements:

AEC-Q100 automotive qualification
ROHS3 compliance
MSL 1 (Unlimited moisture sensitivity)

Substitute parts must satisfy all electrical parameters within the specified ranges and maintain identical package geometry and surface mount characteristics. Parts with extended temperature ranges (-40°C to 125°C) and automotive qualification are preferred for direct replacement in automotive applications.

Parameter Comparison

Parameter	TSV851AIYLT (Main)	APX321WG-7	AZV321KTR-G1	BU7241G-TR	LMV321IDBVR	LMV321IDBVT	LMV321M5/NOPB	LMV321M5X/NOPB	LMV321Q1M5/NOPB	LMV321Q1M5X/NOPB
Manufacturer	STMicroelectronics	Diodes Incorporated	Diodes Incorporated	Rohm Semiconductor	UMW	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	Voltage Feedback	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.7	1	1	0.4	—	1	1	1	1	1
Gain Bandwidth Product (MHz)	1.3	1	1	0.9	1	1	1	1	1	1
Current - Input Bias (nA)	27	15	250	1 pA	10 pA	15	15	15	15	15
Voltage - Input Offset (µV)	800	1700	1700	1000	800	1700	1700	1700	1700	1700
Current - Supply (µA)	130	110	130	70	45	130	130	130	130	130
Current - Output / Channel (mA)	70	90	160	12	25	—	160	—	—	—
Voltage - Supply Span Min (V)	2.5	2.5	2.7	1.8	2.1	2.7	2.7	2.7	2.7	2.7
Voltage - Supply Span Max (V)	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Operating Temperature (°C)	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-25 to 85	-40 to 125	-40 to 85	-40 to 85	-40 to 125	-40 to 125
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-25	SOT-23-5	5-SSOP	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Grade	Automotive	—	—	—	—	—	—	—	Automotive	Automotive
Qualification	AEC-Q100	—	—	—	—	—	—	—	AEC-Q100	AEC-Q100
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Automotive Grade, AEC-Q100 Qualified, Extended Temperature Range):

The LMV321Q1M5/NOPB and LMV321Q1M5X/NOPB from Texas Instruments are the preferred direct substitutes for the TSV851AIYLT. Both parts maintain AEC-Q100 automotive qualification, operate across the full -40°C to 125°C temperature range, and are ROHS3 compliant with MSL 1 rating. These devices are electrically compatible across all critical parameters including supply voltage range (2.7 V to 5.5 V), gain bandwidth product (1 MHz), slew rate (1 V/µs), and output current capability (160 mA). The LMV321Q1M5X/NOPB variant offers extended inventory availability (4400 Pcs) compared to the LMV321Q1M5/NOPB (4094 Pcs).

Secondary Substitutes (Active Status, Extended Temperature Range, Non-Automotive):

The LMV321IDBVT from Texas Instruments is an active product suitable for applications not requiring automotive qualification. This part maintains the extended -40°C to 125°C operating temperature range and ROHS3 compliance. It operates within the specified supply voltage range (2.7 V to 5.5 V) with matching gain bandwidth product (1 MHz) and slew rate (1 V/µs). Current inventory is 3200 Pcs.

Tertiary Substitutes (Active Status, Standard Temperature Range):

The LMV321M5X/NOPB from Texas Instruments is an active product with the highest inventory availability (65100 Pcs). This part is ROHS3 compliant with MSL 1 rating and operates within the supply voltage range (2.7 V to 5.5 V). The operating temperature range is limited to -40°C to 85°C, making it unsuitable for applications requiring the full -40°C to 125°C automotive temperature specification. The LMV321M5/NOPB (7100 Pcs inventory) is also available as an active alternative.

Alternative Substitutes (Package or Performance Variations):

The AZV321KTR-G1 from Diodes Incorporated offers high inventory availability (35400 Pcs) in SOT-23-5 packaging with matching supply voltage range (2.7 V to 5.5 V). However, this part operates only to 85°C and does not carry automotive qualification. The APX321WG-7 from Diodes Incorporated uses SOT-25 packaging (not SOT-23-5) and operates to 85°C maximum temperature. The BU7241G-TR from Rohm Semiconductor operates to 85°C and uses 5-SSOP packaging, with lower output current capability (12 mA) and reduced gain bandwidth product (900 kHz).

Not Recommended:

The LMV321M5 from Texas Instruments is marked as obsolete with non-compliant RoHS status and affected REACH status, making it unsuitable for new designs. The LMV321IDBVR from UMW has a limited operating temperature range (-25°C to 85°C) that does not meet the -40°C minimum specification of the main part.

Frequently Asked Questions (FAQ)

Q: Can the LMV321Q1M5/NOPB directly replace the TSV851AIYLT in automotive applications?

A: Yes. The LMV321Q1M5/NOPB is a direct substitute for automotive applications. Both parts carry AEC-Q100 qualification, operate across -40°C to 125°C, are ROHS3 compliant, and maintain identical SOT-23-5 package geometry. Electrical parameters including supply voltage range (2.7 V to 5.5 V), gain bandwidth product (1 MHz), and output current capability (160 mA) are compatible. The LMV321Q1M5/NOPB offers higher output current (160 mA vs. 70 mA) and improved slew rate (1 V/µs vs. 0.7 V/µs), making it a superior performer in the same package.

Q: What is the difference between LMV321M5X/NOPB and LMV321Q1M5X/NOPB?

A: The primary difference is the operating temperature range and automotive qualification. The LMV321Q1M5X/NOPB operates from -40°C to 125°C with AEC-Q100 automotive qualification, while the LMV321M5X/NOPB operates from -40°C to 85°C without automotive qualification. Both parts are ROHS3 compliant, use SOT-23-5 packaging, and have identical electrical specifications (1 MHz gain bandwidth product, 1 V/µs slew rate, 130 µA supply current). The LMV321M5X/NOPB has higher inventory availability (65100 Pcs vs. 4400 Pcs).

Q: Why is the APX321WG-7 not recommended as a direct substitute?

A: The APX321WG-7 uses SOT-25 packaging instead of SOT-23-5, which has different pin spacing and footprint geometry. While both are 5-pin surface mount packages, they are not mechanically interchangeable without PCB redesign. Additionally, the APX321WG-7 operates only to 85°C maximum temperature, which does not meet the -40°C to 125°C specification of the TSV851AIYLT. The part also lacks automotive qualification.

Q: Can I use the BU7241G-TR as a substitute?

A: The BU7241G-TR is not recommended as a substitute. Although it uses the same SC-74A/SOT-753 case designation, it is packaged as 5-SSOP rather than SOT-23-5, resulting in different pin configurations and footprint geometry. The BU7241G-TR has significantly lower output current capability (12 mA vs. 70 mA), reduced gain bandwidth product (900 kHz vs. 1.3 MHz), and operates only to 85°C without automotive qualification.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life when stored in normal conditions without requiring special moisture-controlled packaging or baking procedures before soldering. This is the most favorable moisture sensitivity rating. Parts with MSL 3 (168 Hours) require more stringent handling and storage protocols, with a maximum shelf life of 168 hours after opening the moisture barrier bag before the component must be baked.

Q: Are there any supply chain advantages to using substitute parts?

A: Yes. The LMV321M5X/NOPB offers significantly higher inventory availability (65100 Pcs) compared to the TSV851AIYLT (1125 Pcs), providing supply chain flexibility. The AZV321KTR-G1 also offers substantial inventory (35400 Pcs). However, inventory availability should be balanced against functional requirements, particularly the operating temperature range and automotive qualification specifications needed for your application.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 is an automotive industry qualification standard that certifies components for use in automotive applications. It requires compliance with specific reliability, quality, and performance standards including temperature cycling, thermal shock, and long-term stability testing. Components with AEC-Q100 qualification are suitable for automotive-grade designs. Components without this qualification should not be used in safety-critical automotive applications.

Q: Can I substitute a part with a lower slew rate?

A: Substitution with a lower slew rate is application-dependent. The TSV851AIYLT has a slew rate of 0.7 V/µs. The BU7241G-TR has 0.4 V/µs, which is lower. Lower slew rates limit the maximum rate of voltage change in the output signal, potentially affecting signal fidelity in high-frequency applications. For low-frequency or DC applications, lower slew rates are acceptable. For high-frequency signal conditioning, the higher slew rates of the LMV321 series (1 V/µs) are preferred.

Q: What is the difference between general-purpose and voltage feedback amplifier types?

A: The LMV321IDBVR is classified as a voltage feedback amplifier, while the TSV851AIYLT is a general-purpose amplifier. Both topologies provide single-circuit rail-to-rail operation, but voltage feedback amplifiers have specific frequency compensation characteristics. For most general-purpose applications, the functional differences are minimal. However, for precision applications requiring specific frequency response characteristics, the amplifier topology should be verified against circuit design requirements.

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