TSH346ID Equivalent & Substitute Parts

Part Overview

The TSH346ID is a video amplifier buffer integrated circuit manufactured by STMicroelectronics, housed in an 8-SOIC surface mount package. This device functions as a three-channel buffer amplifier with a -3dB bandwidth of 36 MHz, designed for video signal conditioning and buffering applications. The TSH346ID is classified as an obsolete product, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

TSH346ID

STMicroelectronicsIn Stock: 1070TSH346ID Datasheet

Current PartRFQ

NCS2563DG

onsemiIn Stock: 2291NCS2563DG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSH346ID is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must utilize the 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width) to ensure direct board-level replacement without layout modifications.

Circuit Configuration: The substitute must provide three independent circuits to match the TSH346ID's three-channel architecture.

Bandwidth Performance: The substitute's -3dB bandwidth must be within acceptable operational range for video signal processing applications. The TSH346ID operates at 36 MHz; substitutes with comparable or superior bandwidth characteristics maintain functional equivalence.

Supply Voltage Range: The substitute must operate within overlapping or compatible supply voltage specifications. The TSH346ID accepts 4.5V to 5.5V; substitutes with voltage ranges that encompass or closely align with this specification ensure reliable operation in existing power distribution systems.

Current Specifications: Output current per channel and total supply current must be evaluated to confirm the substitute can deliver equivalent drive capability and operate within system power budgets.

Compliance and Status: Active product status and ROHS3 compliance ensure long-term availability and regulatory conformance for new production.

Parameter Comparison

Engineering Selection Recommendations

The NCS2563DG from onsemi qualifies as a functional substitute for the TSH346ID based on the following engineering criteria:

Package Equivalence: Both devices utilize identical 8-SOIC surface mount packaging, enabling direct board-level replacement without PCB redesign.

Circuit Architecture: Both devices incorporate three independent circuits, maintaining functional parity in multi-channel signal processing applications.

Bandwidth Compatibility: The NCS2563DG operates at 33 MHz, which is 8.3% lower than the TSH346ID's 36 MHz specification. This bandwidth differential remains within acceptable tolerance for standard video signal conditioning applications where the primary frequency content typically resides below 30 MHz.

Supply Voltage Overlap: The NCS2563DG supply voltage range of 4.75V to 5.25V overlaps substantially with the TSH346ID range of 4.5V to 5.5V. Systems operating at nominal 5V supply voltage accommodate both devices without modification.

Current Characteristics: The NCS2563DG exhibits lower supply current (22 mA versus 44.6 mA) and reduced output current per channel (50 mA versus 134 mA). Applications requiring the full output drive capability of the TSH346ID must evaluate whether the NCS2563DG's reduced current specifications satisfy load requirements.

Product Status and Compliance: The NCS2563DG maintains active product status with ROHS3 compliance, ensuring availability for current and future production requirements. The TSH346ID's obsolete status necessitates transition to an actively manufactured alternative.

Frequently Asked Questions (FAQ)

Q: Can the NCS2563DG directly replace the TSH346ID without PCB modifications?

A: Yes. Both devices share identical 8-SOIC package dimensions and pinout compatibility for three-channel buffer configurations. Direct board-level substitution is possible without layout changes.

Q: What is the significance of the 3 MHz bandwidth difference between these devices?

A: The TSH346ID operates at 36 MHz while the NCS2563DG operates at 33 MHz. For video signal applications where primary frequency content resides below 30 MHz, this 8.3% reduction does not impact functional performance. Applications requiring bandwidth above 33 MHz must evaluate specific signal characteristics.

Q: Are there supply voltage compatibility concerns?

A: The NCS2563DG supply range (4.75V to 5.25V) is narrower than the TSH346ID range (4.5V to 5.5V). Systems operating at nominal 5V supply voltage are compatible. Systems requiring operation at 4.5V or 5.5V extremes must confirm the NCS2563DG operates within acceptable parameters at those voltages.

Q: How do the current specifications affect substitution decisions?

A: The NCS2563DG draws 22 mA supply current compared to the TSH346ID's 44.6 mA, and provides 50 mA output per channel versus 134 mA. Applications with high-impedance loads benefit from reduced power consumption. Applications requiring high-current output drive must confirm the NCS2563DG's 50 mA per channel specification satisfies load requirements.

Q: What compliance certifications apply to both devices?

A: Both the TSH346ID and NCS2563DG are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring regulatory conformance and simplified handling requirements.

Q: Why is the TSH346ID classified as obsolete?

A: The TSH346ID is no longer manufactured by STMicroelectronics. The NCS2563DG from onsemi provides equivalent functionality with active product status, ensuring long-term availability for new designs and production continuity.