TSM104WAIDR Equivalent & Substitute Parts

Part Overview

The TSM104WAIDR is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 16-SOIC surface mount package. This component is classified as a Last Time Buy product, indicating that Texas Instruments has discontinued or will discontinue production. The identification of equivalent and substitute parts is necessary to ensure continued availability for new designs, production runs, and field replacements where the original part is no longer obtainable from primary sources.

Substiute Parts

TSM104WAIDR

Texas InstrumentsIn Stock: 3778TSM104WAIDR Datasheet

Current PartRFQ

TSM104WAIDT

STMicroelectronicsIn Stock: 35680TSM104WAIDT Datasheet

MFR RecommendedRFQ

TSM104WIDT

STMicroelectronicsIn Stock: 18767TSM104WIDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSM104WAIDR is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 4
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Slew Rate: 0.3 V/µs
• Gain Bandwidth Product: 900 kHz
• Operating Temperature Range: -40°C ~ 105°C
• Current - Output / Channel: 40 mA

Allowable Parameter Variations:

• Voltage - Supply Span (Max): Up to 32 V (original maximum: 30 V)
• Current - Input Bias: 20 nA or lower (original: 30 nA)
• Voltage - Input Offset: Up to 1 mV (original: 500 µV)
• Current - Supply: 1.4 mA (fixed)
• Moisture Sensitivity Level (MSL): Up to 3 (original: 1)

Substitute parts must maintain identical mechanical compatibility, electrical performance within specified tolerances, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

TSM104WAIDT (STMicroelectronics)

The TSM104WAIDT is an active production part manufactured by STMicroelectronics. This substitute maintains full electrical and mechanical compatibility with the TSM104WAIDR across all critical performance parameters. The part exhibits improved input bias current performance (20 nA versus 30 nA) and identical input offset voltage specification (500 µV). The maximum supply voltage rating is extended to 32 V compared to the original 30 V specification. Moisture sensitivity is rated at MSL 3 (168 hours) versus MSL 1 on the original part. This substitute is suitable for applications where the original part is unavailable and where the extended supply voltage range and improved input bias characteristics are acceptable.

TSM104WIDT (STMicroelectronics)

The TSM104WIDT is an active production part manufactured by STMicroelectronics. This substitute maintains full electrical and mechanical compatibility with the TSM104WAIDR across all critical performance parameters. The part exhibits improved input bias current performance (20 nA versus 30 nA). The input offset voltage specification is relaxed to 1 mV compared to the original 500 µV specification. The maximum supply voltage rating is extended to 32 V compared to the original 30 V specification. Moisture sensitivity is rated at MSL 3 (168 hours) versus MSL 1 on the original part. This substitute is suitable for applications where the original part is unavailable and where the relaxed input offset voltage tolerance, extended supply voltage range, and improved input bias characteristics are acceptable.

Product Status Consideration

Both substitute parts are classified as Active products, ensuring continued availability and manufacturing support from STMicroelectronics. The original TSM104WAIDR is designated as Last Time Buy, making substitution necessary for long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can TSM104WAIDT and TSM104WIDT be used interchangeably with TSM104WAIDR?

A: Both parts maintain identical mechanical compatibility and core electrical performance specifications including slew rate, gain bandwidth product, supply current, and output current. The TSM104WAIDT preserves the original input offset voltage specification of 500 µV, while the TSM104WIDT relaxes this to 1 mV. Both substitute parts feature improved input bias current (20 nA versus 30 nA). Selection between the two depends on application sensitivity to input offset voltage tolerance.

Q: What is the impact of the different Moisture Sensitivity Level (MSL) ratings?

A: The original TSM104WAIDR carries MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling. Both substitute parts carry MSL 3 (168 hours), requiring that the components be used within 168 hours of the moisture barrier bag being opened. This affects storage, handling, and production scheduling but does not impact electrical performance or functionality once soldered to a printed circuit board.

Q: Are the substitute parts pin-compatible with the original TSM104WAIDR?

A: Yes. All three parts use the 16-SOIC package with identical pin configuration and spacing (0.154", 3.90mm width). Direct substitution on existing printed circuit board layouts is mechanically and electrically feasible.

Q: What is the significance of the extended maximum supply voltage on the substitute parts?

A: The substitute parts (TSM104WAIDT and TSM104WIDT) support a maximum supply voltage of 32 V compared to 30 V on the original part. This extended rating provides additional design margin in applications operating near the upper supply voltage limit. Applications designed for the original 30 V maximum specification remain fully compatible with the substitute parts.

Q: How do the input bias current improvements affect circuit design?

A: Both substitute parts feature input bias current of 20 nA compared to 30 nA on the original part. This 33% reduction in input bias current reduces errors in high-impedance input circuits and improves overall circuit accuracy. Existing designs remain compatible, as the substitute parts represent an improvement in this parameter.

Q: Which substitute part should be selected for new designs?

A: For new designs, either TSM104WAIDT or TSM104WIDT is acceptable based on application requirements. The TSM104WAIDT maintains the original 500 µV input offset voltage specification and is recommended for applications with strict input offset voltage requirements. The TSM104WIDT, with its 1 mV input offset voltage specification, is suitable for applications with relaxed offset voltage tolerance and offers equivalent performance in general-purpose amplifier applications.

Q: Are there any regulatory or compliance differences between the parts?

A: All three parts maintain ROHS3 compliance and REACH Unaffected status. No regulatory or compliance barriers exist to substitution. ECCN and HTSUS classifications are identical across all parts.