THS3115CD Equivalent & Substitute Parts

Part Overview

The THS3115CD is a current feedback amplifier integrated circuit manufactured by Texas Instruments, containing two independent amplifier circuits in a 14-SOIC surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The THS3115CD was designed for applications requiring high-speed signal amplification with a slew rate of 1550V/µs and -3dB bandwidth of 110 MHz. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, system maintenance, and component procurement in legacy and new applications.

Substiute Parts

THS3115CD

Texas InstrumentsIn Stock: 1219THS3115CD Datasheet

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THS3115ID

Texas InstrumentsIn Stock: 1164THS3115ID Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the THS3115CD is determined by strict equivalence across the following critical parameters:

Electrical Performance Parameters: Slew rate (1550V/µs), -3dB bandwidth (110 MHz), input bias current (330 nA), input offset voltage (3 mV), supply current per channel (4.9mA), output current per channel (270 mA), and supply voltage range (10V to 30V) must remain identical.

Functional Architecture: The substitute must contain exactly two independent current feedback amplifier circuits to maintain pin compatibility and functional equivalence.

Physical Package: The 14-SOIC surface mount package with 0.154" (3.90mm) width is mandatory for mechanical and electrical compatibility with existing PCB layouts.

Compliance & Certification: Both ROHS3 compliance and MSL Level 1 rating must be maintained to ensure environmental and handling compatibility.

The THS3115ID qualifies as a direct substitute based on complete parameter equivalence across all electrical, functional, and physical specifications.

Parameter Comparison

Engineering Selection Recommendations

The THS3115ID is the direct substitute for the THS3115CD based on complete electrical and mechanical parameter equivalence. The primary distinction is product status: the THS3115CD is obsolete while the THS3115ID is active, ensuring ongoing availability and supply chain reliability.

An additional advantage of the THS3115ID is its extended operating temperature range (-40°C to 85°C) compared to the THS3115CD (0°C to 70°C). This extended range provides greater flexibility for applications operating in wider environmental conditions without requiring circuit redesign or thermal management modifications.

Both devices maintain identical ROHS3 compliance and MSL Level 1 ratings, ensuring compatibility with modern manufacturing processes and environmental regulations. The identical 14-SOIC package and all electrical specifications enable direct pin-for-pin substitution without PCB layout modifications or circuit redesign.

For new designs and legacy system maintenance, the THS3115ID is the recommended selection due to its active product status and extended temperature operating range, while maintaining complete functional equivalence to the obsolete THS3115CD.

Frequently Asked Questions (FAQ)

Q: Can the THS3115ID be used as a direct replacement for the THS3115CD in existing designs?

A: Yes. The THS3115ID is a direct pin-for-pin substitute with identical electrical specifications, package dimensions, and mounting type. No circuit modifications or PCB layout changes are required.

Q: What is the primary reason to substitute the THS3115CD with the THS3115ID?

A: The THS3115CD is classified as obsolete, indicating discontinued production. The THS3115ID is an active product from the same manufacturer with identical specifications, ensuring long-term component availability and supply chain continuity.

Q: Are there differences in operating temperature ranges between these devices?

A: Yes. The THS3115CD operates from 0°C to 70°C, while the THS3115ID operates from -40°C to 85°C. The THS3115ID provides an extended temperature range suitable for wider environmental applications.

Q: Do both devices have the same package and mounting specifications?

A: Yes. Both the THS3115CD and THS3115ID use the 14-SOIC surface mount package with identical dimensions (0.154" or 3.90mm width), enabling direct mechanical substitution.

Q: Are the electrical performance parameters identical between these devices?

A: Yes. Slew rate (1550V/µs), bandwidth (110 MHz), input bias current (330 nA), input offset voltage (3 mV), supply current (4.9mA per channel), output current (270 mA per channel), and supply voltage range (10V to 30V) are identical.

Q: Do both devices meet current environmental compliance standards?

A: Yes. Both the THS3115CD and THS3115ID are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting modern manufacturing and environmental requirements.

Q: What is the difference in packaging between these devices?

A: The THS3115CD is supplied in standard packaging, while the THS3115ID is supplied in tube packaging. Both use the identical 14-SOIC case, so this difference does not affect electrical or mechanical compatibility.