TSH321ID Equivalent & Substitute Parts

Part Overview

The TSH321ID 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 procurement. The TSH321ID delivers a 300 MHz gain bandwidth product with a 400 V/µs slew rate, suitable for general-purpose amplification applications requiring moderate bandwidth and speed characteristics. Substitute parts must maintain compatibility across packaging, pin configuration, supply voltage range, and operating temperature specifications.

Substiute Parts

TSH321ID

STMicroelectronicsIn Stock: 2026TSH321ID Datasheet

Current PartRFQ

AD8055ARZ-REEL7

Analog Devices Inc.In Stock: 1968AD8055ARZ-REEL7 Datasheet

SimilarRFQ

LMH6704MA/NOPB

Texas InstrumentsIn Stock: 899LMH6704MA/NOPB Datasheet

SimilarRFQ

OPA656U/2K5

Burr BrownIn Stock: 66041OPA656U/2K5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSH321ID are selected based on strict electrical and mechanical compatibility criteria. All substitute devices must meet the following requirements:

Mandatory Compatibility Parameters:

• Package type: 8-SOIC surface mount configuration
• Pin count: 8 pins with compatible pinout
• Supply voltage range: Minimum 6 V to 12 V maximum (or compatible subset)
• Operating temperature range: -40°C to 125°C (or compatible subset)
• Single circuit configuration
• RoHS3 compliance and MSL 1 rating

Electrical Performance Considerations: Substitute parts are grouped by amplifier topology (General Purpose, Voltage Feedback, or Buffer) and performance characteristics. While the TSH321ID is classified as a general-purpose amplifier, substitute devices with higher slew rates, bandwidth, or improved input characteristics remain functionally compatible within the 8-SOIC package constraint. Devices with lower performance specifications are not suitable substitutes.

Parameter Comparison

Engineering Selection Recommendations

AD8055ARZ-REEL7 (Analog Devices Inc.)

The AD8055ARZ-REEL7 is an active substitute for the TSH321ID. This voltage feedback amplifier maintains the 300 MHz bandwidth specification while offering superior slew rate performance at 1400 V/µs. The device is in active production status with ROHS3 compliance and MSL 1 rating. The supply voltage range (8 V to 12 V minimum) is compatible with applications designed for the TSH321ID minimum 6 V specification when the design operates at 8 V or higher. Operating temperature range extends to 125°C, matching the TSH321ID. The AD8055ARZ-REEL7 is supplied in Cut Tape and Digi-Reel packaging formats.

LMH6704MA/NOPB (Texas Instruments)

The LMH6704MA/NOPB is a buffer amplifier substitute offering significantly enhanced performance characteristics. This device delivers 3000 V/µs slew rate and 650 MHz bandwidth, substantially exceeding TSH321ID specifications. The LMH6704MA/NOPB maintains ROHS3 compliance and MSL 1 rating with active product status. The operating temperature range is -40°C to 85°C, which is narrower than the TSH321ID specification. Supply voltage compatibility spans 8 V to 12 V. This substitute is appropriate for applications requiring higher bandwidth and slew rate performance within the temperature constraint.

OPA656U/2K5 (Burr Brown)

The OPA656U/2K5 is a voltage feedback amplifier with active product status. This device provides 500 MHz -3dB bandwidth and 230 MHz gain bandwidth product, with a slew rate of 295 V/µs. The OPA656U/2K5 maintains the 2 pA input bias current specification of the TSH321ID and offers superior input offset voltage at 250 µV. Supply voltage range is 8 V to 12 V, and operating temperature is -40°C to 85°C. RoHS and MSL compliance information is not specified for this device. The OPA656U/2K5 is suitable for applications prioritizing low input bias current and low input offset voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the AD8055ARZ-REEL7 replace the TSH321ID in all applications?

A: The AD8055ARZ-REEL7 is electrically compatible with the TSH321ID in applications where the minimum supply voltage is 8 V or higher. The TSH321ID supports operation at 6 V minimum, while the AD8055ARZ-REEL7 requires 8 V minimum. Both devices share the same 8-SOIC package, pin configuration, and operating temperature range to 125°C. Verify supply voltage requirements in your specific application before substitution.

Q: What is the primary difference between the LMH6704MA/NOPB and the TSH321ID?

A: The LMH6704MA/NOPB is a buffer amplifier topology, whereas the TSH321ID is a general-purpose amplifier. The LMH6704MA/NOPB delivers significantly higher slew rate (3000 V/µs versus 400 V/µs) and bandwidth (650 MHz versus 300 MHz). The operating temperature range of the LMH6704MA/NOPB is -40°C to 85°C, which does not extend to 125°C like the TSH321ID. Both devices are housed in 8-SOIC packages and are RoHS3 compliant.

Q: Is the OPA656U/2K5 suitable for low-bias-current applications?

A: Yes. The OPA656U/2K5 maintains the 2 pA input bias current specification of the TSH321ID, making it suitable for applications requiring minimal input bias current. The OPA656U/2K5 also provides superior input offset voltage at 250 µV compared to the TSH321ID at 500 µV. Both devices are housed in 8-SOIC packages with compatible pinouts.

Q: Are all substitute parts RoHS3 compliant?

A: The AD8055ARZ-REEL7 and LMH6704MA/NOPB are explicitly specified as ROHS3 compliant with MSL 1 rating. The OPA656U/2K5 does not include RoHS or MSL compliance information in the provided specifications. Verify compliance requirements with your procurement or quality assurance department before selecting the OPA656U/2K5 for applications with mandatory RoHS compliance.

Q: What packaging formats are available for these substitute parts?

A: All substitute parts are supplied in 8-SOIC surface mount packages. The AD8055ARZ-REEL7 is available in Cut Tape (CT) and Digi-Reel formats. The LMH6704MA/NOPB is supplied in Tube packaging. The OPA656U/2K5 packaging format is not specified. Confirm packaging availability with your component supplier based on your assembly requirements.

Q: Can I use the LMH6704MA/NOPB in applications requiring operation above 85°C?

A: No. The LMH6704MA/NOPB operating temperature range is -40°C to 85°C. The TSH321ID supports operation to 125°C. If your application requires operation above 85°C, the LMH6704MA/NOPB is not suitable. The AD8055ARZ-REEL7 supports operation to 125°C and is the appropriate substitute for high-temperature applications.

Q: What are the key electrical differences between the three substitute parts?

A: The AD8055ARZ-REEL7 provides 1400 V/µs slew rate with 300 MHz bandwidth. The LMH6704MA/NOPB offers the highest performance with 3000 V/µs slew rate and 650 MHz bandwidth. The OPA656U/2K5 delivers 295 V/µs slew rate with 500 MHz bandwidth. All three devices maintain 8-SOIC packaging and are compatible with 8 V to 12 V supply ranges. Select based on your application's bandwidth and slew rate requirements.