TLC549CP Equivalent & Substitute Parts

Part Overview

The TLC549CP is an 8-bit Analog to Digital Converter (ADC) with a single-ended input, SAR architecture, and SPI data interface. Manufactured by Texas Instruments, this component operates with external voltage reference and supports supply voltages between 3V and 6V. The device is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

TLC549CP

Texas InstrumentsIn Stock: 2165TLC549CP Datasheet

Current PartRFQ

ADC081S021CIMF/NOPB

Texas InstrumentsIn Stock: 25912ADC081S021CIMF/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC549CP is determined by the following core electrical and mechanical parameters:

• Resolution: 8-bit ADC capability
• Sampling Rate: Minimum 40 kSPS performance
• Input Configuration: Single-ended input, 1 channel
• Data Interface: SPI protocol support
• Architecture: SAR (Successive Approximation Register)
• Supply Voltage Compatibility: Operating range overlap with 3V – 6V requirement
• Reference Type: External reference capability
• Mounting Compatibility: Physical form factor and pin configuration

The ADC081S021CIMF/NOPB meets all core electrical substitution criteria while offering enhanced performance characteristics and active product status. The transition from through-hole to surface-mount packaging represents a design consideration rather than a functional limitation.

Parameter Comparison

Engineering Selection Recommendations

The ADC081S021CIMF/NOPB is the manufacturer-recommended substitute for the obsolete TLC549CP. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Functional Compatibility: The substitute maintains 8-bit resolution, single-ended input configuration, and SPI protocol support. The 200 kSPS sampling rate of the ADC081S021CIMF/NOPB exceeds the 40 kSPS specification of the TLC549CP, providing performance headroom for existing applications.

Supply Voltage Consideration: The ADC081S021CIMF/NOPB operates within 2.7V – 5.25V, which overlaps the TLC549CP range of 3V – 6V. Systems operating at 3V – 5.25V experience full compatibility. Applications requiring 5.25V – 6V operation require voltage regulation or alternative component selection.

Reference Architecture Difference: The TLC549CP requires external voltage reference, while the ADC081S021CIMF/NOPB uses supply-based reference. This difference simplifies circuit design and reduces component count in new implementations.

Package and Mounting: The transition from 8-DIP through-hole to SOT-23-6 surface-mount packaging requires PCB redesign. For legacy through-hole systems, adapter solutions or board-level modifications are necessary.

Temperature Range: The ADC081S021CIMF/NOPB supports -40°C – 85°C operation, extending the TLC549CP range of 0°C – 70°C for applications requiring enhanced thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the ADC081S021CIMF/NOPB directly replace the TLC549CP in existing through-hole PCB designs?

A: Direct pin-for-pin replacement is not possible due to package differences. The TLC549CP uses 8-DIP through-hole packaging, while the ADC081S021CIMF/NOPB uses SOT-23-6 surface-mount packaging. PCB redesign or adapter circuitry is required.

Q: Are there electrical compatibility concerns when substituting these components?

A: Both components share 8-bit resolution, single-ended input, and SPI interface specifications. The primary electrical consideration is supply voltage range: the substitute operates at 2.7V – 5.25V versus the original 3V – 6V. Systems operating above 5.25V require voltage regulation.

Q: What is the impact of the reference voltage architecture change?

A: The TLC549CP requires an external reference voltage source, while the ADC081S021CIMF/NOPB uses the supply voltage as reference. This simplifies circuit design by eliminating external reference components but may affect accuracy in applications with unstable supply voltages.

Q: Does the higher sampling rate of the substitute create compatibility issues?

A: The ADC081S021CIMF/NOPB sampling rate of 200 kSPS exceeds the TLC549CP specification of 40 kSPS. This provides performance margin and does not create backward compatibility issues. Existing firmware and interface timing remain valid.

Q: What compliance certifications apply to both components?

A: Both the TLC549CP and ADC081S021CIMF/NOPB maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications.