TLC3574IDWR Equivalent & Substitute Parts

Part Overview

The TLC3574IDWR 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 multi-channel measurement systems.

The TLC3574IDWR is currently in Last Time Buy status, indicating that Texas Instruments has discontinued or will discontinue production. This status necessitates identifying functionally equivalent alternatives to ensure continued availability for new designs and production requirements.

Substiute Parts

TLC3574IDWR

Texas InstrumentsIn Stock: 1255TLC3574IDWR Datasheet

Current PartRFQ

ADS8674IDBTR

Texas InstrumentsIn Stock: 2241ADS8674IDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC3574IDWR is determined by the following critical parameters:

• Resolution and Sampling Rate: The substitute must maintain 14-bit resolution and support sampling rates of at least 200 kSPS to preserve signal fidelity and measurement accuracy.
• Input Configuration: The substitute must support multiple input channels (minimum 2 or 4) with pseudo-differential or single-ended input capability.
• Data Interface: SPI compatibility is required for seamless integration with existing microcontroller and FPGA interfaces.
• Supply Voltage Compatibility: The substitute must operate with 5V analog supply and 2.7V to 5.5V digital supply ranges.
• Package and Mounting: Surface mount packages are required for modern PCB assembly processes.
• Compliance and Certifications: RoHS3 compliance and REACH unaffected status ensure regulatory alignment.

The ADS8674IDBTR qualifies as a substitute based on these parameters, offering equivalent data acquisition functionality within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Selection between the TLC3574IDWR and ADS8674IDBTR should be based on the following factors:

Product Status Consideration: The TLC3574IDWR is in Last Time Buy status, indicating limited future availability. The ADS8674IDBTR maintains Active product status, ensuring long-term supply continuity and manufacturing support.

Compliance Alignment: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements for electronic components in industrial and commercial applications.

Moisture Sensitivity: The TLC3574IDWR carries MSL 1 (Unlimited), while the ADS8674IDBTR carries MSL 2 (1 Year). This difference affects storage and handling requirements; the ADS8674IDBTR requires more controlled storage conditions within a one-year window from manufacturing.

Package Footprint: The TLC3574IDWR uses a 20-SOIC package, while the ADS8674IDBTR uses a 38-TFSOP package. PCB layout modifications are required when transitioning between these packages.

Supply Chain: The ADS8674IDBTR currently maintains higher inventory levels (2200 pcs) compared to the TLC3574IDWR (1229 pcs), supporting immediate procurement needs.

Frequently Asked Questions (FAQ)

Q: Can the ADS8674IDBTR directly replace the TLC3574IDWR on existing PCBs?

A: Direct PCB replacement is not possible due to different package types (20-SOIC versus 38-TFSOP). PCB redesign and re-layout are required. Pin-to-pin compatibility must be verified against device datasheets before implementation.

Q: What are the implications of the different Moisture Sensitivity Levels?

A: The TLC3574IDWR (MSL 1) has unlimited shelf life under standard storage conditions. The ADS8674IDBTR (MSL 2) requires storage within controlled humidity environments and must be used within one year of manufacturing. This affects inventory management and procurement planning.

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

A: Both devices operate across the -40°C to 85°C temperature range, ensuring thermal compatibility for equivalent applications.

Q: What supply voltage considerations apply to substitution?

A: Both devices support 5V analog supply and 2.7V to 5.5V digital supply ranges. Existing power supply designs require no modification for voltage compatibility.

Q: How do the package differences affect assembly and testing?

A: The 38-TFSOP package of the ADS8674IDBTR requires different pick-and-place tooling, solder reflow profiles, and test fixtures compared to the 20-SOIC package of the TLC3574IDWR. Manufacturing process validation is necessary before production implementation.

Q: Are there any compliance or certification differences between these devices?

A: Both devices maintain identical ROHS3, REACH, ECCN, and HTSUS classifications, ensuring regulatory equivalence for procurement and export purposes.