TLC1543IFN Equivalent & Substitute Parts

Part Overview

The TLC1543IFN is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input multiplexing with SPI interface. The device features 11 input channels, a SAR (Successive Approximation Register) architecture, and operates from a 5V supply. Currently classified as Last Time Buy, alternative equivalent parts are necessary for long-term design continuity and procurement planning.

Substiute Parts

TLC1543IFN

Texas InstrumentsIn Stock: 839TLC1543IFN Datasheet

Current PartRFQ

TLC1543IFNG3

Texas InstrumentsIn Stock: 1102TLC1543IFNG3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC1543IFN is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part TLC1543IFNG3 maintains identical specifications in the following key areas:

• Resolution: 10-bit ADC
• Channel count: 11 single-ended inputs
• Sampling rate: 38k samples per second
• Interface protocol: SPI
• Supply voltages: 5V analog and digital
• Temperature range: -40°C to 85°C
• Package: 20-PLCC (9x9) surface mount
• Compliance: ROHS3, REACH Unaffected

Both parts share the same base product number (TLC1543) and are manufactured by Texas Instruments, ensuring functional and pin-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TLC1543IFNG3 is the direct parametric equivalent for the TLC1543IFN. Selection between these parts should be based on product status and procurement availability:

• TLC1543IFN: Last Time Buy status indicates limited future availability. Use existing inventory for current production runs with defined end-of-life timelines.
• TLC1543IFNG3: Active product status with higher current inventory (1078 pcs vs. 813 pcs). Recommended for new designs and long-term production requirements.

Both parts maintain identical electrical performance, thermal characteristics, and compliance certifications (ROHS3, REACH Unaffected). No circuit redesign or firmware modification is required when transitioning between these parts.

Frequently Asked Questions (FAQ)

Q: Are TLC1543IFN and TLC1543IFNG3 pin-compatible? A: Yes. Both parts use the 20-PLCC (9x9) package with identical pinout and electrical characteristics.

Q: Can I use TLC1543IFNG3 as a direct replacement for TLC1543IFN in existing designs? A: Yes. The parts are functionally equivalent across all specified parameters. No PCB layout or schematic changes are required.

Q: What is the difference between these two part numbers? A: The primary difference is product status. TLC1543IFN is Last Time Buy, while TLC1543IFNG3 is Active. All electrical and mechanical specifications are identical.

Q: Are there any temperature or supply voltage differences? A: No. Both parts operate across the same temperature range (-40°C to 85°C) and require identical 5V analog and digital supply voltages.

Q: Do both parts meet the same compliance standards? A: Yes. Both are ROHS3 Compliant, REACH Unaffected, with MSL rating of 1 (Unlimited).

Q: Which part should I specify for new production designs? A: TLC1543IFNG3 is recommended for new designs due to its Active product status and higher inventory availability.