TS321AID Equivalent & Substitute Parts

Part Overview

The TS321AID is a general-purpose operational amplifier manufactured by STMicroelectronics in an 8-SOIC surface mount package. This single-circuit linear amplifier is designed for applications requiring low-power operation across a wide supply voltage range of 3V to 30V. The part is classified as obsolete, making identification of equivalent and substitute components essential for design continuity and procurement planning. Substitute parts must maintain functional compatibility while meeting the same electrical performance requirements and package specifications.

Substiute Parts

TS321AID

STMicroelectronicsIn Stock: 2222TS321AID Datasheet

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OPA244UA

Texas InstrumentsIn Stock: 2006OPA244UA Datasheet

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OPA244UA/2K5

Texas InstrumentsIn Stock: 5218OPA244UA/2K5 Datasheet

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TS321ID

STMicroelectronicsIn Stock: 1379TS321ID Datasheet

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TS321IDR

Texas InstrumentsIn Stock: 2089TS321IDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TS321AID is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package type: 8-SOIC surface mount configuration
• Amplifier classification: General purpose, single circuit
• Supply voltage range: Minimum 3V to maximum 30V
• Operating temperature range: -40°C to 125°C
• Slew rate: 0.4V/µs
• Gain bandwidth product: 800 kHz
• Input bias current: 20 nA
• Input offset voltage: 500 µV
• Output current per channel: 40 mA
• Supply current: 600 µA
• RoHS3 compliance

Substitute Parts Identified:

Group 1 - Direct Electrical and Thermal Equivalents: TS321ID and TS321IDR maintain identical electrical specifications and operating temperature range as the TS321AID. These parts differ only in packaging format and product status.

Group 2 - Functional Substitutes with Parameter Deviations: OPA244UA and OPA244UA/2K5 provide general-purpose amplification in the same 8-SOIC package but with reduced performance specifications. These parts operate at lower slew rate (0.16V/µs versus 0.4V/µs), lower gain bandwidth product (430 kHz versus 800 kHz), lower supply current (50µA versus 600µA), and reduced maximum output current (25 mA versus 40 mA). Operating temperature range is limited to -40°C to 85°C. Supply voltage range extends to 36V maximum.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

TS321IDR is the preferred substitute for the obsolete TS321AID. This part maintains all electrical specifications including slew rate, gain bandwidth product, bias current, offset voltage, supply current, and output current. The operating temperature range of -40°C to 125°C is preserved. TS321IDR carries Active product status, ensuring long-term availability. The part is supplied in Tape & Reel packaging format and maintains ROHS3 compliance with MSL 1 rating. This substitution requires no circuit redesign or performance verification.

TS321ID provides identical electrical specifications but carries Obsolete product status, limiting its suitability for new designs despite current inventory availability.

For Functional Substitution (Reduced Performance Specifications):

OPA244UA/2K5 is suitable for applications where reduced slew rate (0.16V/µs), lower gain bandwidth product (430 kHz), and reduced output current capability (25 mA) are acceptable. This part offers lower supply current consumption (50µA versus 600µA), which may benefit power-constrained applications. The operating temperature range is limited to -40°C to 85°C, restricting use in high-temperature environments. OPA244UA/2K5 carries Active product status and is supplied in Tape & Reel format with ROHS3 compliance. MSL rating of 3 requires controlled storage conditions (168 hours maximum).

OPA244UA provides identical electrical specifications to OPA244UA/2K5 but carries Last Time Buy status, indicating limited future availability. This part is supplied in Tube packaging.

Compliance and Certification:

All identified substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the TS321AID. ECCN classification remains EAR99 for all parts. HTSUS code 8542.33.0001 applies uniformly across all substitutes.

Frequently Asked Questions (FAQ)

Q: Can TS321IDR be used as a direct replacement for TS321AID without circuit modification?

A: Yes. TS321IDR maintains identical electrical specifications across all critical parameters including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, and operating temperature range. The 8-SOIC package is mechanically identical. No circuit redesign is required.

Q: What are the key differences between TS321AID and OPA244UA/2K5?

A: The primary differences are slew rate (0.4V/µs versus 0.16V/µs), gain bandwidth product (800 kHz versus 430 kHz), supply current (600µA versus 50µA), maximum output current (40 mA versus 25 mA), and operating temperature range (-40°C to 125°C versus -40°C to 85°C). OPA244UA/2K5 offers lower power consumption but reduced performance specifications and narrower temperature range.

Q: Is the 8-SOIC package identical across all substitute parts?

A: Yes. All substitute parts use the 8-SOIC package with 0.154" width and 3.90mm width specification. Pin-to-pin compatibility is maintained, allowing direct PCB footprint reuse.

Q: What is the significance of the MSL rating difference between TS321AID and OPA244UA/2K5?

A: TS321AID carries MSL 1 (Unlimited), allowing indefinite storage without moisture absorption concerns. OPA244UA/2K5 carries MSL 3 (168 Hours), requiring controlled storage conditions and limiting shelf life to 168 hours after packaging. This affects supply chain management and component handling procedures.

Q: Why is TS321IDR preferred over TS321ID for new designs?

A: TS321IDR carries Active product status, ensuring continued manufacturing and long-term availability. TS321ID is classified as Obsolete, indicating discontinued production and limited future supply. For design continuity and procurement reliability, Active status parts are preferred.

Q: Can OPA244UA be substituted for TS321AID in high-temperature applications?

A: No. OPA244UA operates only to 85°C maximum, while TS321AID operates to 125°C. Applications requiring operation above 85°C must use TS321IDR or equivalent parts with extended temperature range.

Q: What packaging formats are available for substitute parts?

A: TS321IDR is supplied in Tape & Reel format. OPA244UA/2K5 is supplied in Tape & Reel format. OPA244UA is supplied in Tube format. Selection depends on procurement volume and assembly line requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TS321AID, TS321ID, TS321IDR, OPA244UA, and OPA244UA/2K5 all carry ROHS3 Compliant status and are REACH Unaffected, meeting current environmental and regulatory requirements.