TLC549IPSR Equivalent & Substitute Parts

Part Overview

The TLC549IPSR is an 8-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input applications with a 1 SAR architecture and external reference configuration. This component operates across a 3V to 6V supply range with a 40k samples per second sampling rate and communicates via SPI interface in an 8-SOIC package.

The TLC549IPSR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

TLC549IPSR

Texas InstrumentsIn Stock: 2247TLC549IPSR Datasheet

Current PartRFQ

ADC081S021CIMFX/NOPB

Texas InstrumentsIn Stock: 744ADC081S021CIMFX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC549IPSR is determined by the following critical parameters:

• Resolution: 8-bit ADC architecture
• Sampling Rate: Minimum 40k samples per second
• Input Configuration: Single-ended input, 1 channel
• Communication Protocol: SPI interface compatibility
• Converter Architecture: SAR (Successive Approximation Register)
• Supply Voltage Range: Compatibility with 3V to 6V operation
• Operating Temperature: -40°C to 85°C range
• Package Type: Surface mount configuration

The ADC081S021CIMFX/NOPB meets these substitution criteria while offering enhanced specifications including a higher sampling rate (200k samples per second) and broader supply voltage compatibility (2.7V to 5.25V). Both components maintain 8-bit resolution, single-ended input architecture, SPI interface support, and SAR topology.

Parameter Comparison

Engineering Selection Recommendations

The ADC081S021CIMFX/NOPB is the designated manufacturer-recommended substitute for the TLC549IPSR. Both components are ROHS3 compliant and maintain MSL Level 1 classification, ensuring equivalent environmental and regulatory compliance.

The substitute part offers active product status, providing long-term availability and supply chain stability compared to the obsolete TLC549IPSR. The ADC081S021CIMFX/NOPB maintains functional compatibility through identical 8-bit resolution, single-ended input architecture, and SAR topology.

The primary design consideration is package transition from 8-SOIC to SOT-23-6, which requires PCB layout modification. The substitute part's enhanced sampling rate (200k versus 40k samples per second) and extended lower supply voltage limit (2.7V versus 3V) provide additional operational flexibility without compromising backward compatibility for existing 3V to 6V supply designs.

Frequently Asked Questions (FAQ)

Q: Can the ADC081S021CIMFX/NOPB directly replace the TLC549IPSR without design changes?

A: Functional substitution is possible; however, the package change from 8-SOIC to SOT-23-6 requires PCB layout modification. Pin configuration and footprint differ between these packages.

Q: What are the key compatibility factors for substitution?

A: The substitute maintains 8-bit resolution, single-ended input configuration, SPI interface, SAR architecture, and identical operating temperature range. Supply voltage ranges overlap within the 3V to 6V window, ensuring compatibility with existing power supply designs.

Q: Does the higher sampling rate of the ADC081S021CIMFX/NOPB affect system compatibility?

A: The 200k sampling rate of the substitute exceeds the 40k requirement of the original design. This enhanced performance does not create incompatibility; systems designed for 40k sampling operation function correctly with the higher-performance substitute.

Q: Are there regulatory or compliance differences between these parts?

A: Both components are ROHS3 compliant, REACH unaffected, and classified as MSL Level 1. Regulatory compliance is equivalent.

Q: What is the primary reason for substitution?

A: The TLC549IPSR is obsolete. The ADC081S021CIMFX/NOPB is an active product with confirmed long-term availability, making it the appropriate choice for new designs and ongoing production support.