TLC1543CFN Equivalent & Substitute Parts

Part Overview

The TLC1543CFN is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input processing. This device features 11 input channels with a SAR (Successive Approximation Register) architecture and SPI data interface, operating at a sampling rate of 38 kSPS. The TLC1543CFN is classified as Last Time Buy, indicating limited future availability. Identifying equivalent substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

TLC1543CFN

Texas InstrumentsIn Stock: 60288TLC1543CFN Datasheet

Current PartRFQ

TLC1542CFN

Texas InstrumentsIn Stock: 910TLC1542CFN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The TLC1542CFN qualifies as a parametric equivalent to the TLC1543CFN based on the following critical substitution criteria:

Matching Parameters:

• Resolution: 10-bit ADC
• Sampling Rate: 38 kSPS
• Input Configuration: 11 single-ended channels
• Data Interface: SPI protocol
• Architecture: SAR-based conversion
• Supply Voltages: 5V analog and digital
• Package: 20-PLCC (9x9) surface mount
• Operating Temperature Range: 0°C ~ 70°C
• Compliance: ROHS3 Compliant, REACH Unaffected

The TLC1542CFN maintains identical electrical specifications and mechanical compatibility, enabling direct substitution in circuit designs without modification to PCB layout or firmware interface protocols.

Parameter Comparison

Engineering Selection Recommendations

Both the TLC1543CFN and TLC1542CFN are classified as Last Time Buy products, indicating that both devices have limited remaining availability from the manufacturer. Selection between these parts should prioritize current inventory levels and project timeline requirements.

The TLC1543CFN currently maintains 60,200 units in stock, while the TLC1542CFN has 802 units available. For applications requiring immediate component procurement or long-term production runs, the TLC1543CFN offers superior supply security. The TLC1542CFN serves as a viable alternative when primary stock is exhausted, provided that design qualification and inventory planning account for the reduced available quantity.

Both devices maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications. No design modifications are required when transitioning between these parts.

Frequently Asked Questions (FAQ)

Q: Can the TLC1542CFN directly replace the TLC1543CFN in existing designs?

A: Yes. The TLC1542CFN is a parametric equivalent with identical electrical specifications, pin configuration, and package format. No PCB redesign or firmware modification is required.

Q: Are there differences in SPI protocol implementation between these parts?

A: No. Both devices implement identical SPI data interface specifications, including clock polarity, data timing, and command structure.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the TLC1543CFN and TLC1542CFN operate across 0°C to 70°C, maintaining identical performance characteristics throughout this range.

Q: What is the significance of the Last Time Buy status?

A: Last Time Buy indicates that the manufacturer will not produce additional units beyond current inventory. Both parts are affected by this status, making supply planning critical for long-term production requirements.

Q: Are there any package or mounting differences?

A: No. Both devices use identical 20-PLCC (9x9) surface mount packaging with J-lead configuration, ensuring mechanical and thermal compatibility on PCBs designed for either part number.

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory availability and project timeline. The TLC1543CFN offers greater supply security due to higher stock levels. Both parts are equivalent for technical purposes.