TS321ID Equivalent & Substitute Parts

Part Overview

The TS321ID is a general-purpose operational amplifier manufactured by STMicroelectronics in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The TS321ID serves applications requiring single-channel amplification with moderate bandwidth and low power consumption characteristics. Identification of compatible alternatives ensures design flexibility and supply chain resilience for legacy and new implementations.

Substiute Parts

TS321ID

STMicroelectronicsIn Stock: 1379TS321ID 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 TS321ID is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier type classification (General Purpose)
• Single-circuit configuration
• Slew rate performance (0.4 V/µs)
• Gain bandwidth product (800 kHz)
• Input bias current specification (20 nA)
• Input offset voltage (500 µV)
• Supply current draw (600 µA)
• Output current capability (40 mA per channel)
• Supply voltage range (3 V to 30 V minimum and maximum)
• Operating temperature range (-40°C to 125°C)

Mechanical Compatibility Criteria:

• 8-SOIC package format with 0.154" (3.90mm) width
• Surface mount mounting type

Compliance Criteria:

• ROHS3 compliance
• REACH unaffected status
• EAR99 export classification

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical and mechanical specifications) and Functional Alternatives (compatible within allowed parameter tolerances for the application category).

Parameter Comparison

Engineering Selection Recommendations

TS321IDR (Direct Equivalent - Recommended Primary Substitute)

The TS321IDR is an active product manufactured by Texas Instruments with identical electrical specifications to the TS321ID across all critical parameters: slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, supply voltage range, and operating temperature range. The TS321IDR maintains the same 8-SOIC package format and surface mount configuration. Both devices share ROHS3 compliance, REACH unaffected status, and MSL 1 rating. The primary distinction is product status: TS321IDR is active, ensuring ongoing availability and supply chain support. The TS321IDR is supplied in Tape & Reel packaging, suitable for automated assembly processes.

OPA244UA/2K5 (Functional Alternative - Lower Performance)

The OPA244UA/2K5 is an active product from Texas Instruments classified as a general-purpose amplifier in the MicroAmplifier™ series. This device shares the 8-SOIC package format and surface mount mounting type with the TS321ID. However, electrical performance differs across multiple parameters: slew rate is reduced to 0.16 V/µs (60% lower), gain bandwidth product is 430 kHz (46% lower), supply current is 50 µA (92% lower), and output current is 25 mA (37.5% lower). The OPA244UA/2K5 operates at a lower maximum temperature (85°C versus 125°C) and has a higher moisture sensitivity level (MSL 3 versus MSL 1). The device supports a wider supply voltage range (2.2 V to 36 V). The OPA244UA/2K5 is suitable for applications where reduced bandwidth, lower power consumption, and lower output current are acceptable trade-offs.

Selection Criteria:

• For direct replacement with identical performance: Select TS321IDR
• For low-power applications with reduced bandwidth requirements: Select OPA244UA/2K5
• For applications requiring extended temperature operation to 125°C: Select TS321IDR
• For applications with moisture-sensitive environments: Select TS321IDR (MSL 1 rating)

Frequently Asked Questions (FAQ)

Q: Can the TS321IDR be used as a direct replacement for the TS321ID?

A: Yes. The TS321IDR provides identical electrical specifications across all measured parameters: slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, supply voltage range, and operating temperature range. Both devices use the 8-SOIC package format. The primary difference is product status (TS321IDR is active) and packaging format (TS321IDR is supplied in Tape & Reel).

Q: What are the performance differences between the TS321ID and OPA244UA/2K5?

A: The OPA244UA/2K5 has lower slew rate (0.16 V/µs versus 0.4 V/µs), lower gain bandwidth product (430 kHz versus 800 kHz), lower supply current (50 µA versus 600 µA), and lower output current (25 mA versus 40 mA). The OPA244UA/2K5 operates at a maximum temperature of 85°C compared to 125°C for the TS321ID. The OPA244UA/2K5 supports a wider supply voltage range (2.2 V to 36 V).

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

A: Yes. The TS321ID, TS321IDR, and OPA244UA/2K5 are all available in 8-SOIC (0.154", 3.90mm width) surface mount packages. Pin-to-pin compatibility is maintained across all three devices.

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

A: The TS321ID is supplied in bulk packaging, while the TS321IDR is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly processes. Both devices are identical in electrical performance and package format.

Q: Does the OPA244UA/2K5 have different compliance certifications?

A: No. The OPA244UA/2K5 maintains ROHS3 compliance and REACH unaffected status, consistent with the TS321ID. However, the OPA244UA/2K5 has a higher moisture sensitivity level (MSL 3 with 168-hour limit) compared to the TS321ID (MSL 1 with unlimited rating). This affects storage and handling requirements.

Q: Which substitute should be selected for high-temperature applications?

A: The TS321IDR is the appropriate choice for applications requiring operation up to 125°C. The OPA244UA/2K5 is limited to 85°C maximum operating temperature.

Q: Can the OPA244UA/2K5 be used in applications requiring 40 mA output current?

A: No. The OPA244UA/2K5 provides a maximum output current of 25 mA per channel, which is insufficient for applications requiring the full 40 mA output capability of the TS321ID. Applications requiring 40 mA output current must use the TS321IDR.