TSH103IDT Equivalent & Substitute Parts

Part Overview

The TSH103IDT is a video amplifier buffer integrated circuit manufactured by STMicroelectronics in an 8-SOIC surface mount package. This device contains three buffer circuits designed for video signal conditioning applications. The TSH103IDT is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching package type, circuit count, and electrical operating parameters within specified tolerances.

Substiute Parts

TSH103IDT

STMicroelectronicsIn Stock: 5436TSH103IDT Datasheet

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NCS2563DG

onsemiIn Stock: 2291NCS2563DG Datasheet

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THS7314D

Texas InstrumentsIn Stock: 35116THS7314D Datasheet

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THS7314DR

Texas InstrumentsIn Stock: 55384THS7314DR Datasheet

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THS7315D

Texas InstrumentsIn Stock: 1601THS7315D Datasheet

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THS7315DR

Texas InstrumentsIn Stock: 28252THS7315DR Datasheet

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THS7316D

Texas InstrumentsIn Stock: 35213THS7316D Datasheet

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THS7316DR

Texas InstrumentsIn Stock: 41296THS7316DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSH103IDT are selected based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Package type: 8-SOIC (0.154", 3.90mm Width) surface mount
• Number of circuits: 3 buffer stages
• Application classification: Buffer amplifier
• Voltage supply range compatibility: Minimum 4.5V operation capability
• Output current capability: Minimum 56 mA per channel

Secondary Compatibility Factors:

• RoHS3 compliance for regulatory alignment
• Moisture sensitivity level acceptable for standard handling
• Current supply consumption within practical design margins

Substitute parts are grouped into two categories: direct functional equivalents with matching circuit count and bandwidth characteristics, and higher-performance alternatives that exceed the original specifications while maintaining pin-compatible 8-SOIC packaging and buffer application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Functional Equivalents (3-Circuit Buffer Configuration):

The THS7314D and THS7314DR from Texas Instruments provide the closest functional match to the TSH103IDT. Both devices maintain the three-circuit buffer configuration in an 8-SOIC package with active product status. These parts offer expanded voltage supply range (2.85V ~ 5.5V) compared to the original specification, providing greater design flexibility. Output current capability is increased to 70 mA per channel, exceeding the TSH103IDT requirement of 56 mA. Both parts are ROHS3 compliant and suitable for direct substitution in existing designs. The THS7314D is supplied in tube packaging, while the THS7314DR is supplied in Cut Tape and Digi-Reel format.

Higher-Performance Alternatives (3-Circuit Buffer Configuration):

The THS7316D and THS7316DR offer enhanced bandwidth performance at 36 MHz compared to the TSH103IDT at 9.4 MHz, while maintaining the three-circuit buffer configuration. These devices provide output current of 90 mA per channel and operate across the 2.85V ~ 5.5V supply range. Both are ROHS3 compliant and active products. Selection of these parts is appropriate when bandwidth requirements exceed the original specification or when higher output drive capability is required.

Single-Circuit Alternative:

The THS7315D and THS7315DR contain a single buffer circuit rather than three, making them unsuitable as direct replacements for the TSH103IDT in applications requiring three independent buffer stages. These parts are listed for reference only when circuit count reduction is acceptable in system redesign.

Filter-Based Alternative:

The NCS2563DG from onsemi is classified as a filter amplifier rather than a buffer amplifier, with a -3dB bandwidth of 33 MHz. While this device maintains the three-circuit configuration and 8-SOIC package, the functional classification difference and output current specification of 50 mA (below the TSH103IDT requirement of 56 mA) make it unsuitable for direct substitution in buffer applications.

Recommended Primary Substitutes:

1. THS7314DR (Texas Instruments) - Active status, tape and reel packaging, 3-circuit buffer
2. THS7314D (Texas Instruments) - Active status, tube packaging, 3-circuit buffer
3. THS7316DR (Texas Instruments) - Active status, enhanced bandwidth, tape and reel packaging
4. THS7316D (Texas Instruments) - Active status, enhanced bandwidth, tube packaging

All recommended substitutes are ROHS3 compliant, maintain 8-SOIC surface mount packaging, and provide active product status for long-term availability.

Frequently Asked Questions (FAQ)

Q: Why is the TSH103IDT being replaced?

A: The TSH103IDT is classified as obsolete by the manufacturer. Substitute parts ensure continued availability for production and design continuity through active, currently manufactured alternatives.

Q: What is the primary criterion for selecting a substitute part?

A: The substitute must maintain the 8-SOIC surface mount package, three-circuit buffer configuration, and operate within the 4.5V ~ 5.5V supply voltage range of the original design. Output current capability must meet or exceed 56 mA per channel.

Q: Can the THS7315D or THS7315DR be used as substitutes?

A: No. These parts contain only one buffer circuit, whereas the TSH103IDT contains three. They are not suitable for direct replacement unless the application is redesigned to use multiple single-circuit devices.

Q: What is the difference between THS7314D and THS7314DR?

A: Both parts are electrically identical. The primary difference is packaging format: THS7314D is supplied in tube packaging, while THS7314DR is supplied in Cut Tape and Digi-Reel format. Selection depends on assembly line requirements and inventory management preferences.

Q: Are the THS7316D and THS7316DR direct replacements?

A: Yes, they are functionally compatible. The THS7316 series offers higher bandwidth (36 MHz versus 9.4 MHz) and increased output current (90 mA versus 56 mA per channel). These enhanced specifications do not create incompatibility; they provide additional performance margin for the application.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All recommended substitutes maintain this compliance level.

Q: Why does the NCS2563DG have lower output current than the TSH103IDT?

A: The NCS2563DG is classified as a filter amplifier with a -3dB bandwidth of 33 MHz, whereas the TSH103IDT is a buffer amplifier. The different functional classification results in different electrical characteristics, including output current specification of 50 mA, which falls below the TSH103IDT requirement of 56 mA per channel.

Q: Can I use parts with lower supply current consumption?

A: The substitute parts listed (THS7314, THS7315, THS7316 series) have higher supply current consumption than the TSH103IDT (16-22 mA versus 5.5 mA). This difference reflects improved performance characteristics and does not prevent substitution if the power supply design accommodates the increased current draw.

Q: What is Moisture Sensitivity Level (MSL)?

A: MSL indicates the maximum time a component can be stored in standard conditions before requiring baking prior to soldering. The TSH103IDT has MSL 1 (unlimited storage), while substitute parts have MSL 2 (1 year maximum storage). Standard component handling procedures accommodate this difference.

Q: Are all substitute parts available in the same packaging formats?

A: No. The THS7314D and THS7316D are supplied in tube packaging, while THS7314DR and THS7316DR are supplied in Cut Tape and Digi-Reel format. Selection depends on assembly equipment compatibility and procurement requirements.