TS321IDBVTG4 Equivalent & Substitute Parts

Part Overview

The TS321IDBVTG4 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement. The TS321IDBVTG4 operates across a supply voltage range of 3V to 30V with an operating temperature range of -40°C to 125°C, making it suitable for industrial and extended-temperature applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	0.4	V/µs
Gain Bandwidth Product	800	kHz
Current - Input Bias	20	nA
Voltage - Input Offset	500	µV
Current - Supply	600	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature Range	-40 to 125	°C
Package / Case	SC-74A, SOT-753	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TS321IDBVTG4 is determined by electrical and mechanical parameter compatibility within the general-purpose operational amplifier category. The critical parameters governing substitution are:

Electrical Compatibility Parameters:

Slew Rate: 0.4 V/µs (fixed across all candidates)
Current - Input Bias: 20 nA (primary specification for TS321 variants)
Voltage - Input Offset: 500 µV (primary specification for TS321 variants)
Current - Supply: 600 µA (primary specification for TS321 variants)
Current - Output / Channel: 40 mA (fixed across all candidates)
Voltage - Supply Span: 3V to 30V minimum (primary specification for TS321 variants)
Operating Temperature Range: -40°C to 125°C (extended-temperature requirement)

Mechanical Compatibility Parameters:

Package / Case: SC-74A, SOT-753
Mounting Type: Surface Mount
Supplier Device Package: SOT-23-5

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct electrical equivalents maintaining identical electrical specifications, and manufacturer-recommended alternatives with enhanced specifications or automotive qualification.

Parameter Comparison

Parameter	TS321IDBVTG4	TS321ILT	TS321AILT	TS321AIYLT	TS321IYLT	LM321MF/NOPB	LM321MFX/NOPB
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Slew Rate (V/µs)	0.4	0.4	0.4	0.4	0.4	0.4	0.4
Gain Bandwidth Product (kHz)	800	800	800	800	800	1000	1000
Current - Input Bias (nA)	20	20	20	20	20	45	45
Voltage - Input Offset (µV)	500	500	500	500	500	2000	2000
Current - Supply (µA)	600	600	600	600	600	660	660
Current - Output / Channel (mA)	40	40	40	40	40	40	40
Voltage - Supply Span (Min) (V)	3	3	3	3	3	3	3
Voltage - Supply Span (Max) (V)	30	30	30	30	30	30	32
Operating Temperature Range (°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85
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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	—	—	—	AEC-Q100	AEC-Q100	—	—

Engineering Selection Recommendations

Direct Electrical Equivalents (Identical Specifications):

The TS321ILT, TS321AILT, TS321AIYLT, and TS321IYLT maintain identical electrical specifications to the TS321IDBVTG4, including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and operating temperature range. All four parts are active products with ROHS3 compliance and MSL 1 rating. The TS321AIYLT and TS321IYLT variants include AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade reliability. Selection among these direct equivalents depends on availability and automotive qualification requirements.

Enhanced Specification Alternatives (LM321 Series):

The LM321MF/NOPB and LM321MFX/NOPB offer enhanced gain bandwidth product (1 MHz versus 800 kHz) and are active products with ROHS3 compliance. These parts exhibit higher input bias current (45 nA versus 20 nA) and input offset voltage (2 mV versus 500 µV). The LM321MFX/NOPB supports extended supply voltage to 32V. Both LM321 variants operate at reduced temperature range (-40°C to 85°C) compared to the TS321IDBVTG4 (-40°C to 125°C). These alternatives are suitable for applications where extended temperature operation is not required and enhanced bandwidth is beneficial.

Procurement Considerations:

TS321ILT offers the highest inventory availability (104,400 units) with direct electrical equivalence. TS321AIYLT and TS321IYLT provide automotive-qualified alternatives with lower inventory levels. LM321MFX/NOPB provides the largest inventory among enhanced-specification alternatives (65,300 units).

Frequently Asked Questions (FAQ)

Q: Can the LM321MF/NOPB or LM321MFX/NOPB be used as direct replacements for the TS321IDBVTG4?

A: The LM321 series parts are functionally compatible in SOT-23-5 package and share core operational amplifier architecture. However, they differ in three electrical specifications: gain bandwidth product (1 MHz versus 800 kHz), input bias current (45 nA versus 20 nA), and input offset voltage (2 mV versus 500 µV). Additionally, the LM321 series operates at -40°C to 85°C, while the TS321IDBVTG4 operates to 125°C. Applications requiring extended temperature operation or tight input offset specifications must use TS321 variants.

Q: What is the difference between TS321AIYLT and TS321IYLT?

A: Both parts are electrically identical and share AEC-Q100 automotive qualification. The primary distinction is inventory availability: TS321AIYLT has 10,025 units in stock, while TS321IYLT has 18,972 units. Both maintain identical electrical specifications and operating temperature range (-40°C to 125°C).

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the TS321IDBVTG4.

Q: Which substitute part should be selected for automotive applications?

A: The TS321AIYLT and TS321IYLT are qualified to AEC-Q100 automotive standards and maintain identical electrical specifications to the TS321IDBVTG4. These parts are suitable for automotive-grade applications requiring extended temperature operation to 125°C.

Q: What is the impact of the 200 kHz gain bandwidth product difference between TS321 and LM321 variants?

A: The LM321 series provides 1 MHz gain bandwidth product compared to 800 kHz for TS321 variants. This 25% increase in bandwidth enables faster transient response and higher frequency operation. Applications with frequency-dependent performance requirements must evaluate whether enhanced bandwidth is beneficial or if the TS321 specification is sufficient.

Q: Can the TS321IDBVTG4 be replaced in applications operating above 85°C?

A: The TS321IDBVTG4 operates to 125°C. The LM321MF/NOPB and LM321MFX/NOPB are limited to 85°C maximum operating temperature and are not suitable for applications exceeding this temperature. Direct TS321 equivalents (TS321ILT, TS321AILT, TS321AIYLT, TS321IYLT) maintain the 125°C operating temperature and are required for extended-temperature applications.

Q: Are there any REACH or ECCN compliance differences among the substitute parts?

A: All substitute parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99) with the TS321IDBVTG4. No compliance differentiation exists among the listed alternatives.

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