TSV321IDT Equivalent & Substitute Parts

Part Overview

The TSV321IDT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, indicating discontinued production and limited availability. The TSV321IDT features rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.6	V/µs
Gain Bandwidth Product	1.4	MHz
Current - Input Bias	70	nA
Voltage - Input Offset	200	µV
Current - Supply	500	µA
Current - Output / Channel	80	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	6	V
Operating Temperature	-40°C ~ 125°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TSV321IDT is determined by strict adherence to the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface-mount package to ensure direct PCB footprint compatibility.

Functional Requirements: Substitute parts must be general-purpose operational amplifiers with single-circuit configuration and rail-to-rail output capability.

Electrical Operating Range: The supply voltage span must encompass or exceed the TSV321IDT range of 2.5 V to 6 V. Substitute parts with minimum supply voltage of 2 V or lower and maximum supply voltage of 6 V or higher satisfy this requirement.

Temperature Range: Substitute parts must support the full operating temperature range of -40°C to 125°C to maintain functional equivalence across all environmental conditions.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy current manufacturing and environmental standards.

The following substitute parts meet these criteria and are available from active manufacturers: MCP6271-E/SN, MCP6L71T-E/SN, OPA344UA, OPA344UA/2K5, TLV2470CD, TLV2470IDR, and TLV2471ID.

Parameter Comparison

Parameter	TSV321IDT	MCP6271-E/SN	MCP6L71T-E/SN	OPA344UA	OPA344UA/2K5	TLV2470CD	TLV2470IDR	TLV2471ID
Manufacturer	STMicroelectronics	Microchip Technology	Microchip Technology	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	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
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.6	0.9	0.9	0.8	0.8	1.5	1.5	1.5
Gain Bandwidth Product (MHz)	1.4	2	2	1	1	2.8	2.8	2.8
Current - Input Bias (pA)	70000	1	1	0.2	0.2	2.5	2.5	2.5
Voltage - Input Offset (µV)	200	3000	1000	200	200	250	250	250
Current - Supply (µA)	500	170	150	150	150	600	600	600
Current - Output / Channel (mA)	80	25	Not Specified	15	15	35	35	35
Voltage - Supply Span (Min)	2.5 V	2 V	2 V	2.5 V	2.5 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	6 V	6 V	6 V	5.5 V	5.5 V	6 V	6 V	6 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes for Full Compatibility:

The TLV2470IDR and TLV2471ID from Texas Instruments provide the most comprehensive compatibility with the TSV321IDT. Both parts support the complete operating temperature range of -40°C to 125°C, maintain MSL 1 moisture sensitivity rating, and offer supply voltage operation from 2.7 V to 6 V. These devices are in active production status with established supply chains.

Alternative Substitutes with Temperature Limitations:

The OPA344UA and OPA344UA/2K5 from Texas Instruments are active products with superior input bias current performance (0.2 pA) and matching input offset voltage (200 µV). However, these devices operate only to 85°C maximum temperature, restricting their use to applications not requiring the full -40°C to 125°C range. The OPA344UA/2K5 variant is supplied in Tape & Reel packaging, while OPA344UA is supplied in Tube packaging.

Microchip Technology Options:

The MCP6271-E/SN and MCP6L71T-E/SN from Microchip Technology support the full -40°C to 125°C operating temperature range and offer improved slew rate (0.9 V/µs) and gain bandwidth product (2 MHz) compared to the TSV321IDT. The MCP6L71T-E/SN provides superior input offset voltage specification (1 mV) and lower supply current (150 µA). MCP6271-E/SN is supplied in Tube packaging, while MCP6L71T-E/SN is supplied in Tape & Reel packaging.

Limited Temperature Range Option:

The TLV2470CD from Texas Instruments operates only from 0°C to 70°C, making it unsuitable for applications requiring the full industrial temperature range. This device is available in Tube packaging with 1117 units in stock.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the TSV321IDT be directly replaced with any of these substitute parts?

A: Direct replacement depends on application temperature requirements. The TLV2470IDR and TLV2471ID support the full -40°C to 125°C operating range of the TSV321IDT. The OPA344UA variants are limited to -40°C to 85°C. The TLV2470CD operates only from 0°C to 70°C and is not suitable for full industrial temperature range applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) surface-mount package, ensuring identical PCB footprint compatibility. Packaging format (Tube, Tape & Reel, or Cut Tape) differs by part number but does not affect electrical or mechanical compatibility.

Q: What is the significance of the supply voltage range differences?

A: The TSV321IDT operates from 2.5 V to 6 V. The MCP6271-E/SN and MCP6L71T-E/SN support 2 V to 6 V, providing operation at lower supply voltages. The OPA344UA variants operate from 2.5 V to 5.5 V, limiting maximum supply voltage to 5.5 V. The TLV2470 series operates from 2.7 V to 6 V. Applications requiring operation below 2.5 V must use Microchip Technology options.

Q: How do input bias current specifications affect substitution?

A: The TSV321IDT has 70 nA input bias current. The OPA344UA variants offer superior performance at 0.2 pA. The MCP6271-E/SN and MCP6L71T-E/SN provide 1 pA. The TLV2470 series specifies 2.5 pA. Lower input bias current reduces loading effects on signal sources and is beneficial for high-impedance applications.

Q: What is the impact of slew rate differences?

A: The TSV321IDT has 0.6 V/µs slew rate. Substitute parts offer higher slew rates: MCP6271-E/SN and MCP6L71T-E/SN at 0.9 V/µs, OPA344UA variants at 0.8 V/µs, and TLV2470 series at 1.5 V/µs. Higher slew rate enables faster signal transitions and improved performance in dynamic applications.

Q: Are there moisture sensitivity considerations for long-term storage?

A: The TSV321IDT, MCP6271-E/SN, MCP6L71T-E/SN, TLV2470CD, TLV2470IDR, and TLV2471ID all have MSL 1 (Unlimited) rating, allowing indefinite storage without moisture bake-out requirements. The OPA344UA variants have MSL 2 (1 Year) rating, requiring moisture control during storage and a 1-year shelf life limit.

Q: Which substitute offers the best overall performance improvement?

A: The TLV2471ID provides the highest gain bandwidth product (2.8 MHz) and slew rate (1.5 V/µs) while maintaining full -40°C to 125°C temperature range and MSL 1 moisture sensitivity. This device is suitable for applications requiring improved dynamic performance without temperature or storage constraints.

Q: Can output current drive capability affect circuit design?

A: The TSV321IDT provides 80 mA output current per channel. Substitute parts vary: MCP6271-E/SN at 25 mA, OPA344UA variants at 15 mA, and TLV2470 series at 35 mA. Applications requiring high output current must use the TSV321IDT or verify that substitute parts provide sufficient drive capability for the intended load.

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