TLC1543CDWR Equivalent & Substitute Parts

Part Overview

The TLC1543CDWR is a 10-bit Analog to Digital Converter (ADC) with SAR architecture, featuring 11 single-ended inputs and SPI data interface. This device is designed for data acquisition applications requiring moderate sampling rates of 38 kSPS. The part operates on 5V supply for both analog and digital domains and is housed in a 20-SOIC package.

The TLC1543CDWR is classified as Obsolete, making it necessary to identify equivalent and substitute components for new designs or when inventory becomes unavailable. Substitute parts must maintain functional compatibility while meeting the electrical and mechanical requirements of the application.

Substiute Parts

TLC1543CDWR

Texas InstrumentsIn Stock: 21204TLC1543CDWR Datasheet

Current PartRFQ

ADS7956SDBTR

Texas InstrumentsIn Stock: 1809ADS7956SDBTR Datasheet

MFR RecommendedRFQ

TLC1542CDWR

Texas InstrumentsIn Stock: 4767TLC1542CDWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLC1543CDWR are classified into two categories based on compatibility criteria:

Parametric Equivalent: Parts that maintain identical or near-identical electrical specifications and package form factor, allowing direct replacement with minimal or no circuit modifications.

Manufacturer Recommended Substitute: Parts that offer enhanced performance characteristics or extended operating ranges while maintaining core functional compatibility through the same data interface and architecture.

Substitution eligibility is determined by the following parameters:

• Resolution (10 bits)
• Architecture (SAR)
• Data Interface (SPI)
• Input Configuration (Single Ended)
• Reference Type (External)
• Mounting Type (Surface Mount)

Parameter Comparison

Engineering Selection Recommendations

TLC1542CDWR is the parametric equivalent for direct replacement in existing designs. This part maintains identical electrical specifications, package form factor, and operating temperature range. The TLC1542CDWR is classified as Last Time Buy, indicating limited future availability. Both the main part and this equivalent are ROHS3 compliant with MSL rating of 1.

ADS7956SDBTR is the manufacturer-recommended substitute offering enhanced capabilities. This part provides extended supply voltage ranges (2.7V to 5.25V analog, 1.7V to 5.25V digital), higher sampling rate (1 MSPS), expanded operating temperature range (-40°C to 125°C), and one additional input channel (12 vs. 11). The ADS7956SDBTR is classified as Active with current production status. Package migration from 20-SOIC to 38-TSSOP requires PCB layout modifications. This part carries MSL rating of 2 and is ROHS3 compliant.

Selection between these substitutes depends on application requirements: use TLC1542CDWR for pin-compatible replacement; use ADS7956SDBTR for new designs requiring higher performance, extended temperature operation, or lower supply voltage flexibility.

Frequently Asked Questions (FAQ)

Q: Can TLC1542CDWR be used as a direct replacement for TLC1543CDWR?

A: Yes. The TLC1542CDWR is a parametric equivalent with identical resolution, sampling rate, number of inputs, package, and operating temperature range. No circuit modifications are required for substitution.

Q: What are the key differences between TLC1543CDWR and ADS7956SDBTR?

A: The ADS7956SDBTR offers higher sampling rate (1 MSPS vs. 38 kSPS), extended supply voltage ranges, broader operating temperature range (-40°C to 125°C vs. 0°C to 70°C), and one additional input channel. The package changes from 20-SOIC to 38-TSSOP, requiring PCB redesign.

Q: Is the ADS7956SDBTR suitable for applications requiring 5V operation only?

A: Yes. The ADS7956SDBTR supports 5V operation within its specified supply voltage ranges (2.7V to 5.25V analog, 1.7V to 5.25V digital) and is fully compatible with 5V-only designs.

Q: What PCB considerations apply when migrating from TLC1543CDWR to ADS7956SDBTR?

A: Package migration from 20-SOIC to 38-TSSOP requires new PCB layout. Pin assignments differ between packages, necessitating schematic and layout review. The 38-TSSOP package has different thermal and electrical characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TLC1543CDWR, TLC1542CDWR, and ADS7956SDBTR are all ROHS3 compliant and REACH unaffected.

Q: What is the MSL rating difference between substitutes?

A: TLC1543CDWR and TLC1542CDWR have MSL rating 1 (unlimited shelf life). ADS7956SDBTR has MSL rating 2 (1-year shelf life), requiring controlled storage conditions.