TLC3578IPW Equivalent & Substitute Parts

Part Overview

The TLC3578IPW is a 14-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring SAR (Successive Approximation Register) architecture. This device features 4 or 8 pseudo-differential and single-ended input channels with a 200 kSPS sampling rate and external reference capability. The TLC3578IPW is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued design support, maintain supply chain reliability, and plan for future production requirements.

Substiute Parts

TLC3578IPW

Texas InstrumentsIn Stock: 1735TLC3578IPW Datasheet

Current PartRFQ

ADS8678IDBTR

Texas InstrumentsIn Stock: 3055ADS8678IDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ADS8678IDBTR is identified as a manufacturer-recommended substitute for the TLC3578IPW. Substitution eligibility is determined by the following critical parameters:

• Architecture: Both devices employ SAR-based analog-to-digital conversion
• Data Interface: Both utilize SPI communication protocol
• Reference Type: Both support external reference configuration
• Supply Voltage Compatibility: Both operate within overlapping digital supply ranges (2.7V ~ 5.5V)
• RoHS and Environmental Compliance: Both meet ROHS3 requirements and share identical MSL ratings
• Mounting Technology: Both are surface-mount devices suitable for automated assembly

The ADS8678IDBTR represents an active product with expanded capabilities and higher inventory availability, making it suitable for new designs and ongoing production requirements.

Parameter Comparison

Engineering Selection Recommendations

The TLC3578IPW is designated Last Time Buy, indicating discontinuation and limited future availability. The ADS8678IDBTR is classified as Active product status, ensuring long-term supply chain continuity and manufacturer support.

Selection of the ADS8678IDBTR is supported by:

• Identical compliance certifications (ROHS3, REACH Unaffected, EAR99 classification)
• Matching environmental specifications (MSL 2, operating temperature range)
• Shared core architecture and communication protocol (SAR, SPI)
• Higher current inventory availability (3036 units versus 1643 units)
• Continued manufacturer support and technical documentation

For applications currently using the TLC3578IPW, transition planning to the ADS8678IDBTR is recommended to ensure uninterrupted supply and design continuity.

Frequently Asked Questions (FAQ)

Q: Can the ADS8678IDBTR directly replace the TLC3578IPW in existing designs?

A: Both devices share SAR architecture, SPI interface, external reference capability, and identical digital supply voltage ranges. Package differences (24-TSSOP versus 38-TSSOP) require PCB layout evaluation. Detailed datasheet comparison of pin assignments and functional specifications is necessary before implementation.

Q: What is the significance of the Last Time Buy status for the TLC3578IPW?

A: Last Time Buy designation indicates the manufacturer will no longer accept new orders after a specified cutoff date. Existing inventory will be depleted, and the device will be discontinued. Planning for alternative components is essential for long-term production sustainability.

Q: Are there compliance or environmental differences between these devices?

A: Both devices meet ROHS3 compliance, carry REACH Unaffected status, and share identical MSL ratings (2, 1 Year). No environmental or regulatory compliance barriers exist for substitution.

Q: How do package differences affect substitution?

A: The TLC3578IPW uses 24-TSSOP packaging while the ADS8678IDBTR uses 38-TSSOP packaging. Different pin counts and physical dimensions require PCB redesign. Footprint compatibility must be verified before component selection.

Q: What supply voltage considerations apply to substitution?

A: Both devices operate with digital supply voltage of 2.7V ~ 5.5V. The TLC3578IPW specifies 5V analog supply, while the ADS8678IDBTR specifications were not provided for analog supply. Verify analog supply requirements in the ADS8678IDBTR datasheet before implementation.