TLC2555ID Equivalent & Substitute Parts

Part Overview

The TLC2555ID is a 12-bit Analog to Digital Converter (ADC) with a single pseudo-differential input, designed for data acquisition applications. It features a SAR (Successive Approximation Register) architecture with an external reference, operating at a 400 kHz sampling rate. The device is packaged in an 8-SOIC surface mount package and operates across the industrial temperature range of -40°C to 85°C.

The TLC2555ID is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications.

Substiute Parts

TLC2555ID

Texas InstrumentsIn Stock: 887TLC2555ID Datasheet

Current PartRFQ

TLC2555IDGK

Texas InstrumentsIn Stock: 753TLC2555IDGK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC2555ID is determined by strict equivalence across the following critical parameters:

• Resolution and Sampling Rate: 12-bit resolution at 400 kHz sampling rate
• Input Configuration: Single pseudo-differential input with 1:1 S/H:ADC ratio
• Interface Protocol: SPI data interface
• Conversion Architecture: SAR-based analog-to-digital conversion
• Power Supply Requirements: 5V analog and digital supply voltages
• Reference Configuration: External reference type
• Temperature Range: -40°C to 85°C industrial operating range
• Base Product Family: TLC2555 series

The TLC2555IDGK qualifies as a manufacturer-recommended substitute because it maintains identical electrical specifications and functional characteristics across all critical parameters. The primary difference is the package variant: the substitute uses an 8-VSSOP (Very Small Shrink Small Outline Package) instead of the 8-SOIC package, with a narrower body width of 3.00mm versus 3.90mm.

Parameter Comparison

Engineering Selection Recommendations

The TLC2555IDGK is the manufacturer-recommended substitute for the obsolete TLC2555ID. Selection of this substitute is supported by the following factors:

Product Status: The TLC2555ID is obsolete, while the TLC2555IDGK maintains active product status from Texas Instruments, ensuring ongoing availability and manufacturer support.

Electrical Equivalence: All functional and electrical parameters are identical, including resolution, sampling rate, input configuration, interface protocol, supply voltages, and operating temperature range. The devices are pin-compatible at the functional level.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for electronic components.

Package Consideration: The substitute uses an 8-VSSOP package instead of 8-SOIC. This represents a smaller footprint (3.00mm width versus 3.90mm width) and requires PCB layout modification. Pin pitch and functional pinout remain compatible; however, physical board layout must be updated to accommodate the narrower package body.

Supply Chain: The TLC2555IDGK has confirmed inventory availability (732 units in stock) compared to the obsolete status of the original part, providing reliable sourcing for new designs and production runs.

Frequently Asked Questions (FAQ)

Q: Can the TLC2555IDGK be used as a direct replacement for the TLC2555ID without any modifications?

A: The TLC2555IDGK is functionally equivalent and pin-compatible at the electrical level. However, the package change from 8-SOIC to 8-VSSOP requires PCB layout modification. The narrower body width (3.00mm versus 3.90mm) means the footprint dimensions differ, necessitating updated PCB artwork and component placement.

Q: What are the key differences between the TLC2555ID and TLC2555IDGK?

A: The primary difference is the package type. The TLC2555ID uses an 8-SOIC package, while the TLC2555IDGK uses an 8-VSSOP package. All electrical specifications, performance characteristics, and functional parameters are identical. Both devices are from the TLC2555 base product family.

Q: Are there any electrical performance differences between these two parts?

A: No. Both devices have identical 12-bit resolution, 400 kHz sampling rate, SPI interface, SAR architecture, external reference configuration, and 5V supply requirements. Operating temperature range, input type, and all other electrical parameters are equivalent.

Q: Why is the TLC2555ID obsolete while the TLC2555IDGK is active?

A: Texas Instruments has transitioned the TLC2555 product line to the VSSOP package variant (TLC2555IDGK) as the active offering. This reflects industry trends toward smaller package footprints and improved manufacturing efficiency. The VSSOP package provides equivalent functionality in a more compact form factor.

Q: What compliance certifications apply to both parts?

A: Both the TLC2555ID and TLC2555IDGK are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity level). Both are classified under ECCN EAR99 and HTSUS code 8542.39.0001.

Q: If I need the exact 8-SOIC package, are there other alternatives?

A: Based on the provided substitute list, only the TLC2555IDGK is identified as the manufacturer-recommended equivalent. For applications requiring the 8-SOIC package specifically, consultation with Texas Instruments technical support or component distributors may identify other options within the broader TLC255x product family.