TS321IDT Equivalent & Substitute Parts

Part Overview

The TS321IDT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The TS321IDT serves as a single-circuit general-purpose amplifier suitable for applications requiring low input bias current and moderate bandwidth performance across a wide supply voltage range.

Key Parameters

Parameter	Value
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°C to 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the TS321IDT is determined by electrical and mechanical parameter equivalence. The critical parameters governing substitution are:

Amplifier Type: General Purpose
Number of Circuits: 1
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Electrical Specifications: Slew Rate (0.4 V/µs), Gain Bandwidth Product (800 kHz), Input Bias Current (20 nA), Input Offset Voltage (500 µV), Supply Current (600 µA), Output Current (40 mA), Supply Voltage Range (3 V to 30 V), Operating Temperature (-40°C to 125°C)
Compliance: ROHS3 Compliant, REACH Unaffected, MSL 1

Parts meeting all these criteria are classified as direct substitutes. The TS321IDT has two identified substitute parts: TS321ID and TS321IDR, both manufactured variants of the base TS321 product line.

Parameter Comparison

Parameter	TS321IDT	TS321ID	TS321IDR
Manufacturer	STMicroelectronics	STMicroelectronics	Texas Instruments
Product Status	Obsolete	Obsolete	Active
Amplifier Type	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1
Slew Rate	0.4 V/µs	0.4 V/µs	0.4 V/µs
Gain Bandwidth Product	800 kHz	800 kHz	800 kHz
Current - Input Bias	20 nA	20 nA	20 nA
Voltage - Input Offset	500 µV	500 µV	500 µV
Current - Supply	600 µA	600 µA	600 µA
Current - Output / Channel	40 mA	40 mA	40 mA
Voltage - Supply Span (Min)	3 V	3 V	3 V
Voltage - Supply Span (Max)	30 V	30 V	30 V
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging	Standard	Standard	Tape & Reel (TR)

Engineering Selection Recommendations

TS321ID: This STMicroelectronics variant is electrically and mechanically identical to the TS321IDT. Both devices share obsolete product status. Selection of TS321ID is appropriate for applications where STMicroelectronics sourcing is preferred and inventory availability is sufficient. Current inventory of 1,288 pieces is available.

TS321IDR: This Texas Instruments variant maintains full electrical and mechanical equivalence to the TS321IDT. The TS321IDR holds active product status, providing superior long-term availability and supply chain stability compared to the obsolete TS321IDT. The device is supplied in Tape & Reel packaging, suitable for automated assembly processes. Current inventory of 2,036 pieces is available. The active product status of TS321IDR makes it the preferred selection for new designs and production continuity.

Both substitute parts satisfy ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity requirements, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can TS321ID and TS321IDR be used interchangeably with TS321IDT?

A: Yes. All three parts share identical electrical specifications, package geometry (8-SOIC), mounting type (surface mount), and compliance certifications. Pin-for-pin compatibility is confirmed across all parameters provided.

Q: What is the primary difference between TS321ID and TS321IDR?

A: The TS321IDR is manufactured by Texas Instruments and maintains active product status, while TS321ID is an STMicroelectronics part with obsolete status. TS321IDR is supplied in Tape & Reel packaging, whereas TS321ID uses standard packaging. Electrically and mechanically, both are equivalent to TS321IDT.

Q: Why is product status relevant for component selection?

A: Product status indicates supply chain availability and manufacturer support. Active products (TS321IDR) typically offer longer availability windows and more reliable sourcing. Obsolete products (TS321IDT, TS321ID) may face supply constraints and eventual discontinuation.

Q: Are there any thermal or environmental differences between these parts?

A: No. All three parts operate across the identical temperature range (-40°C to 125°C) and share the same MSL rating (1, Unlimited), indicating equivalent moisture sensitivity and thermal performance.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) packaging used for TS321IDR is a supply format only and does not alter electrical characteristics or performance. It is optimized for automated assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TS321ID and TS321IDR are both ROHS3 compliant and REACH unaffected, matching the compliance profile of TS321IDT.

Q: What supply voltage range is supported by these parts?

A: All three parts support a supply voltage range of 3 V to 30 V, enabling operation across single-supply and dual-supply configurations.

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