TSH173IDT Equivalent & Substitute Parts

Part Overview

The TSH173IDT 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 8.2 MHz, designed for video signal conditioning applications. The TSH173IDT is classified as an obsolete product, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

TSH173IDT

STMicroelectronicsIn Stock: 2823TSH173IDT Datasheet

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NCS2563DG

onsemiIn Stock: 2291NCS2563DG Datasheet

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THS7314DR

Texas InstrumentsIn Stock: 55384THS7314DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSH173IDT are selected based on the following critical parameters that determine functional compatibility:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct board-level compatibility without layout modifications.

Circuit Configuration: All substitute parts must provide three independent circuits to match the tri-channel buffer architecture of the original device.

Supply Voltage Range: Substitute parts must operate within or encompass the 4.5V to 5.5V supply voltage specification of the TSH173IDT.

Output Current Capability: Substitute parts must deliver output current per channel equal to or greater than 38 mA to support equivalent load conditions.

Compliance Standards: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements for the original application.

The two identified substitute parts meet these criteria while offering enhanced performance characteristics in bandwidth and supply current specifications.

Parameter Comparison

Engineering Selection Recommendations

THS7314DR (Texas Instruments) is the primary substitute for the TSH173IDT. This part maintains active product status with established supply chain availability (55,300 pieces in stock). The THS7314DR provides superior output current capability (70 mA per channel versus 38 mA), extended supply voltage range (2.85V to 5.5V), and rail-to-rail output configuration. The device is ROHS3 compliant and REACH unaffected, satisfying regulatory requirements. The MSL rating of 2 (1 Year) requires standard moisture control during storage and handling.

NCS2563DG (onsemi) serves as an alternative substitute with active product status. This device offers significantly enhanced bandwidth (33 MHz versus 8.2 MHz) and increased output current per channel (50 mA). The NCS2563DG maintains the same MSL rating as the original part (1, Unlimited), providing superior moisture tolerance. The supply voltage range (4.75V to 5.25V) is narrower than the original specification but encompasses the standard 5V operating point. Higher supply current consumption (22 mA) must be evaluated against application power budget constraints.

Both substitute parts satisfy the mandatory compatibility criteria of identical package geometry, three-circuit configuration, and regulatory compliance. Selection between these alternatives depends on specific application requirements regarding bandwidth performance, output current demands, and power consumption constraints.

Frequently Asked Questions (FAQ)

Q: Can the THS7314DR directly replace the TSH173IDT without PCB modifications?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm Width) surface mount packages with the same pin pitch and body dimensions. Direct socket-level substitution is possible without layout changes.

Q: What is the significance of the supply voltage range differences between these parts?

A: The TSH173IDT operates from 4.5V to 5.5V. The THS7314DR extends this range to 2.85V to 5.5V, enabling operation in lower voltage applications. The NCS2563DG operates from 4.75V to 5.25V, which is narrower but centered on the standard 5V supply point. Verify your application's supply voltage falls within the selected substitute's operating range.

Q: How do the bandwidth specifications affect substitution suitability?

A: The TSH173IDT provides 8.2 MHz bandwidth. The NCS2563DG offers 33 MHz bandwidth, providing superior high-frequency performance for video signal conditioning. The THS7314DR bandwidth is not specified in the provided data. For applications requiring the original 8.2 MHz specification, the NCS2563DG's higher bandwidth is compatible and provides additional performance margin.

Q: What does the MSL (Moisture Sensitivity Level) rating indicate for component handling?

A: MSL ratings define moisture exposure limits during storage and assembly. The TSH173IDT and NCS2563DG carry MSL 1 (Unlimited), requiring no special moisture control. The THS7314DR carries MSL 2 (1 Year), requiring storage in dry conditions and limiting the time from package opening to reflow soldering to one year.

Q: Are all three devices RoHS3 compliant?

A: Yes. The TSH173IDT, NCS2563DG, and THS7314DR are all ROHS3 compliant and REACH unaffected, satisfying environmental and regulatory requirements for equivalent substitution.

Q: How do output current specifications impact circuit design?

A: The TSH173IDT provides 38 mA per channel output current. The NCS2563DG provides 50 mA, and the THS7314DR provides 70 mA. Higher output current capability allows driving lower impedance loads or multiple parallel loads. Verify your application's load impedance and current requirements fall within the selected substitute's output current specification.

Q: What is the difference between buffer and filter applications in these devices?

A: The TSH173IDT is specified for buffer applications, providing signal conditioning without frequency filtering. The NCS2563DG is specified for filter applications, incorporating frequency filtering characteristics. Both devices are three-channel video amplifiers in identical packages. Application requirements determine whether filtering functionality is beneficial or must be avoided.