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TSH74CPT Equivalent & Substitute Parts
Part Overview
The TSH74CPT is a general-purpose operational amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit rail-to-rail amplifier in a 14-TSSOP surface mount package. This device is classified as obsolete, indicating discontinuation from the manufacturer. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | TSH74CPT | — |
| Manufacturer | STMicroelectronics | — |
| Category | Linear, Amplifiers | — |
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) | — |
| Mounting Type | Surface Mount | — |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 12 | V |
| Operating Temperature | 0°C ~ 70°C | — |
| Product Status | Obsolete | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TSH74CPT is determined by the following critical parameters:
Package Compatibility: All substitute parts must use the 14-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm Width) to ensure direct PCB compatibility without layout modifications.
Electrical Configuration: Substitute parts must provide 4 operational amplifier circuits in a single package with rail-to-rail output capability to maintain functional equivalence.
Supply Voltage Range: Substitute parts must operate within or encompass the TSH74CPT supply voltage range of 3V to 12V. Parts with extended ranges (such as 2.7V to 12.8V) are acceptable as they cover the original specification.
Amplifier Classification: While the TSH74CPT is classified as general-purpose, voltage feedback amplifiers with superior performance characteristics are acceptable substitutes provided they meet the package, circuit count, and output type requirements.
Compliance Standards: All substitute parts must maintain ROHS3 compliance and MSL 1 rating to ensure regulatory and manufacturing process compatibility.
The substitute parts identified below satisfy these criteria and are grouped by amplifier type and performance characteristics.
Parameter Comparison
| Parameter | TSH74CPT | AD8054ARUZ | LMH6644MT/NOPB | LMH6644MTX/NOPB | MAX4495AUD+ | MAX4495AUD+T |
|---|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Analog Devices Inc. | Texas Instruments | Texas Instruments | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Amplifier Type | General Purpose | Voltage Feedback | Voltage Feedback | Voltage Feedback | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Voltage - Supply Span (Min) | 3 V | 3 V | 2.7 V | 2.7 V | 4.5 V | 4.5 V |
| Voltage - Supply Span (Max) | 12 V | 12 V | 12.8 V | 12.8 V | 11 V | 11 V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Slew Rate | 118 V/µs | 190 V/µs | 135 V/µs | 135 V/µs | 3 V/µs | 3 V/µs |
| Current - Input Bias | 6 µA | 2 µA | 1.6 µA | 1.6 µA | 200 nA | 200 nA |
| Voltage - Input Offset | 1.1 mV | 1.8 mV | 1 mV | 1 mV | 300 µV | 300 µV |
| Current - Output / Channel | 55 mA | 30 mA | 75 mA | 75 mA | 15 mA | 15 mA |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Extended Temperature Range):
The AD8054ARUZ and MAX4495AUD+/MAX4495AUD+T are recommended as primary substitutes. Both are active products with extended operating temperature ranges (-40°C to 125°C), providing superior long-term availability and supply chain stability compared to the obsolete TSH74CPT. These parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing processes and regulatory requirements.
Secondary Substitutes (Active Status, Voltage Feedback Architecture):
The LMH6644MT/NOPB and LMH6644MTX/NOPB from Texas Instruments are active products offering voltage feedback amplifier architecture with extended supply voltage range (2.7V to 12.8V). These parts provide higher output current capability (75 mA per channel) and are suitable for applications requiring enhanced drive capability. The LMH6644MTX/NOPB variant offers higher inventory availability in Cut Tape and Digi-Reel packaging formats.
Selection Criteria:
Choose AD8054ARUZ or MAX4495AUD+/MAX4495AUD+T when general-purpose amplifier characteristics and extended temperature operation are required. Select LMH6644MT/NOPB or LMH6644MTX/NOPB when higher output current, extended supply voltage range, or voltage feedback topology is beneficial to the application. All substitutes maintain identical package geometry and pin configuration, enabling direct replacement without PCB redesign.
Frequently Asked Questions (FAQ)
Q: Can the TSH74CPT be directly replaced with any of these substitute parts without PCB modifications?
A: Yes. All substitute parts use the identical 14-TSSOP surface mount package with matching physical dimensions (0.173", 4.40mm Width) and pin configuration. Direct PCB replacement is possible without layout changes.
Q: What is the primary reason for identifying substitutes for the TSH74CPT?
A: The TSH74CPT is classified as obsolete, indicating discontinuation from STMicroelectronics. Substitute parts are active products with ongoing manufacturer support, ensuring long-term availability and supply chain continuity.
Q: Are all substitute parts compliant with current regulatory standards?
A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory requirements and manufacturing process standards.
Q: What is the difference between the LMH6644MT/NOPB and LMH6644MTX/NOPB?
A: Both parts are electrically identical with matching performance specifications. The primary difference is packaging format: LMH6644MT/NOPB is supplied in Tube packaging, while LMH6644MTX/NOPB is supplied in Cut Tape and Digi-Reel format. The LMH6644MTX/NOPB variant has higher inventory availability.
Q: What is the difference between MAX4495AUD+ and MAX4495AUD+T?
A: Both parts are electrically identical with matching performance specifications. The primary difference is packaging format: MAX4495AUD+ is supplied in Tube packaging, while MAX4495AUD+T is supplied in Tape & Reel format. Selection depends on assembly process requirements and inventory management preferences.
Q: How do the voltage feedback amplifiers (AD8054ARUZ, LMH6644 series) differ from general-purpose amplifiers (TSH74CPT, MAX4495 series)?
A: Voltage feedback amplifiers typically offer higher slew rates and bandwidth compared to general-purpose designs. The AD8054ARUZ provides 190 V/µs slew rate and 160 MHz bandwidth, while LMH6644 series provides 135 V/µs slew rate and 130 MHz bandwidth. These characteristics make voltage feedback amplifiers suitable for high-speed signal processing applications. General-purpose amplifiers prioritize lower power consumption and cost efficiency.
Q: What supply voltage range considerations apply when selecting a substitute?
A: The TSH74CPT operates from 3V to 12V. All substitute parts support this range. The LMH6644 series extends the minimum to 2.7V, providing additional flexibility for lower-voltage applications. The MAX4495 series requires a minimum of 4.5V, which is compatible with the TSH74CPT specification but does not extend the lower voltage capability.
Q: Are there any temperature range limitations when substituting the TSH74CPT?
A: The TSH74CPT operates from 0°C to 70°C. All substitute parts extend the operating temperature range to at least -40°C to 85°C, providing enhanced performance in wider temperature environments. This extended range is beneficial for industrial and automotive applications.
Q: Which substitute part offers the highest output current capability?
A: The LMH6644MT/NOPB and LMH6644MTX/NOPB provide 75 mA output current per channel, compared to 55 mA for the TSH74CPT. These parts are suitable for applications requiring higher load drive capability.
Q: Which substitute part offers the lowest power consumption?
A: The MAX4495AUD+ and MAX4495AUD+T provide the lowest supply current at 770 µA across all four channels, compared to 8.2 mA for the TSH74CPT. These parts are suitable for battery-powered and low-power applications.
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