TS321IDBVRG4 Equivalent & Substitute Parts Reference

Part Overview

The TS321IDBVRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-5 (SC-74A) surface mount configuration. This device is classified as obsolete product status, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The TS321IDBVRG4 operates across a supply voltage range of 3 V to 30 V with an operating temperature range of -40°C to 125°C, making it suitable for industrial and consumer applications requiring low-power amplification.

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	-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 TS321IDBVRG4 is determined by electrical and mechanical parameter compatibility within the general-purpose operational amplifier category. The critical parameters governing substitution are:

Electrical Compatibility Criteria:

Slew Rate: 0.4 V/µs (primary performance metric)
Gain Bandwidth Product: 800 kHz or higher
Current - Input Bias: 20 nA or lower
Voltage - Input Offset: 500 µV or lower
Current - Supply: 600 µA or lower
Current - Output / Channel: 40 mA or higher
Voltage - Supply Span: minimum 3 V, maximum 30 V or higher
Operating Temperature Range: -40°C to 125°C or wider

Mechanical Compatibility Criteria:

Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-23-5
Mounting Type: Surface Mount
Moisture Sensitivity Level: 1 (Unlimited)

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Product Status: Active preferred for new designs

Substitute parts are grouped into two categories: direct electrical equivalents (TS321IDBVR, TS321AILT, TS321AIYLT, TS321ILT, TS321IYLT) and functional alternatives with enhanced specifications (LM321MF/NOPB, LM321MFX/NOPB).

Parameter Comparison

Parameter	TS321IDBVRG4	TS321IDBVR	LM321MF/NOPB	LM321MFX/NOPB	TS321AILT	TS321AIYLT	TS321ILT	TS321IYLT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Slew Rate (V/µs)	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
Gain Bandwidth Product (kHz)	800	800	1000	1000	800	800	800	800
Current - Input Bias (nA)	20	20	45	45	20	20	20	20
Voltage - Input Offset (µV)	500	500	2000	2000	500	500	500	500
Current - Supply (µA)	600	600	660	660	600	600	600	600
Current - Output / Channel (mA)	40	40	40	40	40	40	40	40
Voltage - Supply Span Min (V)	3	3	3	3	3	3	3	3
Voltage - Supply Span Max (V)	30	30	30	32	30	30	30	30
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	—	—	—	AEC-Q100	—	AEC-Q100

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

TS321IDBVR and TS321ILT are the preferred substitutes for the obsolete TS321IDBVRG4. Both parts maintain identical electrical specifications (0.4 V/µs slew rate, 800 kHz gain bandwidth product, 20 nA input bias current, 500 µV input offset voltage) and operating temperature range (-40°C to 125°C). TS321IDBVR is manufactured by Texas Instruments with active product status and 56,900 units in stock. TS321ILT is manufactured by STMicroelectronics with active product status and 104,400 units in stock. Both are ROHS3 compliant with MSL 1 rating.

Automotive-Grade Alternatives:

TS321AIYLT and TS321IYLT are automotive-qualified variants (AEC-Q100) with identical electrical specifications to the main part. These are suitable for applications requiring automotive-grade components. TS321AIYLT has 10,025 units in stock; TS321IYLT has 18,972 units in stock.

Enhanced Performance Alternatives:

LM321MF/NOPB and LM321MFX/NOPB offer higher gain bandwidth product (1 MHz versus 800 kHz) and extended maximum supply voltage (32 V for LM321MFX/NOPB). These parts have higher input bias current (45 nA) and input offset voltage (2 mV) compared to the original specification. Operating temperature range is limited to -40°C to 85°C. These alternatives are suitable for applications where extended bandwidth is beneficial and the reduced temperature range is acceptable. LM321MF/NOPB has 28,941 units in stock; LM321MFX/NOPB has 65,300 units in stock.

Selection Criteria by Application:

For direct replacement in existing designs: Select TS321IDBVR or TS321ILT.

For automotive applications: Select TS321AIYLT or TS321IYLT.

For applications requiring extended bandwidth and higher supply voltage: Select LM321MFX/NOPB.

For applications with temperature requirements above 85°C: Avoid LM321 series; use TS321 variants.

Frequently Asked Questions (FAQ)

Q: Can TS321IDBVR directly replace TS321IDBVRG4 in existing PCB designs?

A: Yes. TS321IDBVR is electrically and mechanically identical to TS321IDBVRG4. Both use SOT-23-5 packaging, have identical pin configurations, and meet the same electrical specifications. The primary difference is product status: TS321IDBVRG4 is obsolete while TS321IDBVR is active.

Q: What is the difference between TS321ILT and TS321IDBVR?

A: Both parts have identical electrical specifications and operating parameters. The difference is manufacturer: TS321IDBVR is manufactured by Texas Instruments; TS321ILT is manufactured by STMicroelectronics. Both are ROHS3 compliant and suitable for direct substitution.

Q: Can LM321MF/NOPB be used as a drop-in replacement?

A: LM321MF/NOPB is mechanically compatible (SOT-23-5 package) but has different electrical specifications. Input bias current is higher (45 nA versus 20 nA), input offset voltage is higher (2 mV versus 500 µV), and operating temperature range is narrower (-40°C to 85°C versus -40°C to 125°C). Use LM321MF/NOPB only if the application tolerates these parameter differences and does not require operation above 85°C.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry standard qualification. TS321AIYLT and TS321IYLT carry this qualification, indicating suitability for automotive applications. Use these variants for automotive designs requiring qualified components.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TS321IDBVR, LM321MF/NOPB, LM321MFX/NOPB, TS321AILT, TS321AIYLT, TS321ILT, TS321IYLT) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute has the highest inventory availability?

A: TS321ILT has the highest inventory with 104,400 units in stock, followed by LM321MFX/NOPB with 65,300 units and TS321AILT with 69,500 units.

Q: Can I use LM321MFX/NOPB in applications requiring -40°C to 125°C operation?

A: No. LM321MFX/NOPB operating temperature range is -40°C to 85°C. For applications requiring operation above 85°C, use TS321 variants (TS321IDBVR, TS321AILT, TS321AIYLT, TS321ILT, or TS321IYLT), which all support -40°C to 125°C.

Q: What is the maximum supply voltage for each substitute?

A: TS321IDBVR, TS321AILT, TS321AIYLT, TS321ILT, and TS321IYLT support 3 V to 30 V. LM321MF/NOPB supports 3 V to 30 V. LM321MFX/NOPB supports 3 V to 32 V.

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