TLC3574IPW Equivalent & Substitute Parts

Part Overview

The TLC3574IPW is a 14-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring moderate sampling rates and flexible input configurations. This device features a Successive Approximation Register (SAR) architecture with support for both pseudo-differential and single-ended inputs, making it suitable for industrial measurement and control systems.

The TLC3574IPW is classified as Last Time Buy, indicating that Texas Instruments has discontinued this product line. Organizations currently using this component must identify equivalent alternatives to ensure continuity of supply for new designs or production runs. The substitute part identified below provides functional compatibility while maintaining compliance with current manufacturing standards.

Substiute Parts

TLC3574IPW

Texas InstrumentsIn Stock: 1486TLC3574IPW Datasheet

Current PartRFQ

ADS8674IDBTR

Texas InstrumentsIn Stock: 2241ADS8674IDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ADS8674IDBTR has been identified as a manufacturer-recommended substitute for the TLC3574IPW. Substitution eligibility is determined by the following critical parameters:

Resolution and Sampling Rate: Both devices operate at 14-bit resolution with 200 kSPS sampling capability, ensuring equivalent data acquisition performance.

Input Configuration: Both support multiple input channels with pseudo-differential and single-ended input types, maintaining compatibility with existing signal conditioning circuits.

Data Interface: Both devices utilize SPI protocol for digital communication, allowing direct integration with existing microcontroller and FPGA interfaces without protocol conversion.

Supply Voltage Compatibility: Both operate within overlapping supply voltage ranges (2.7V ~ 5.5V digital, 5V analog), permitting use in identical power distribution architectures.

Temperature Range: Both devices maintain -40°C ~ 85°C operating specifications, suitable for industrial and commercial applications.

Compliance Standards: Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

The primary difference lies in package configuration: the ADS8674IDBTR uses a 38-TSSOP package compared to the 20-TSSOP of the TLC3574IPW. This requires PCB layout modification but does not affect electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

The ADS8674IDBTR is the appropriate substitute for the TLC3574IPW based on the following engineering criteria:

Product Status and Supply Continuity: The TLC3574IPW is designated Last Time Buy, indicating end-of-life status. The ADS8674IDBTR maintains Active product status with current manufacturing support, ensuring long-term availability and supply chain stability.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental regulations without additional qualification requirements.

Functional Equivalence: Identical resolution, sampling rate, input types, and SPI interface ensure direct functional replacement in data acquisition applications without firmware or protocol modifications.

Packaging Consideration: The transition from 20-TSSOP to 38-TSSOP requires PCB redesign. Organizations must evaluate layout constraints and board space availability before implementation.

Moisture Handling: The ADS8674IDBTR carries MSL 2 rating (1-year shelf life) compared to MSL 1 (unlimited) for the TLC3574IPW. Storage and handling procedures must account for this increased moisture sensitivity.

Frequently Asked Questions (FAQ)

Q: Can the ADS8674IDBTR be used as a direct pin-for-pin replacement?

A: No. While functionally equivalent, the ADS8674IDBTR uses a 38-TSSOP package versus the 20-TSSOP of the TLC3574IPW. Pin assignments differ, requiring PCB layout modification and firmware verification of pin mapping.

Q: Are there differences in SPI communication protocols between these devices?

A: Both devices use SPI protocol for digital communication. Detailed register maps and command structures must be verified against respective datasheets to ensure software compatibility.

Q: What is the impact of the different Moisture Sensitivity Levels?

A: The ADS8674IDBTR (MSL 2) requires controlled storage conditions with a 1-year shelf life limit, whereas the TLC3574IPW (MSL 1) has unlimited shelf life. Storage, handling, and reflow procedures must comply with MSL 2 requirements to prevent moisture-induced failures.

Q: Are both devices suitable for the same temperature range applications?

A: Yes. Both devices operate across -40°C to 85°C, maintaining identical temperature specifications for industrial and commercial environments.

Q: What supply voltage adjustments are necessary?

A: No adjustments are required. Both devices operate within 2.7V to 5.5V digital supply and 5V analog supply ranges, permitting use in identical power distribution circuits.

Q: Is firmware modification required when switching from TLC3574IPW to ADS8674IDBTR?

A: Firmware verification is necessary to confirm SPI register compatibility and pin mapping alignment. Consult device datasheets for detailed register definitions and command structures.