TLC251CPSRG4 Equivalent & Substitute Parts

Part Overview

The TLC251CPSRG4 is a general purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SO surface mount package. This LinCMOS™ series device is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. The TLC251CPSRG4 operates across a supply voltage range of 1.4 V to 16 V with a single amplifier circuit configuration suitable for general purpose analog signal processing applications.

Substiute Parts

TLC251CPSRG4

Texas InstrumentsIn Stock: 1045TLC251CPSRG4 Datasheet

Current PartRFQ

TS271CDT

STMicroelectronicsIn Stock: 7884TS271CDT Datasheet

MFR RecommendedRFQ

TS271IDT

STMicroelectronicsIn Stock: 5108TS271IDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC251CPSRG4 is determined by the following critical parameters:

Functional Equivalence Criteria:

• Single amplifier circuit configuration
• General purpose amplifier classification
• Surface mount technology compatibility
• 8-pin SOIC package family

Electrical Compatibility Criteria:

• Input offset voltage: 1.1 mV (common specification)
• Supply voltage range overlap: minimum 3 V to maximum 16 V
• Operating temperature range: 0°C to 70°C baseline
• Input bias current performance: pA-level specification

Compliance & Regulatory Criteria:

• ROHS3 compliance requirement
• MSL Level 1 (Unlimited) moisture sensitivity
• REACH unaffected status
• EAR99 export classification

The substitute parts TS271CDT and TS271IDT from STMicroelectronics meet these criteria as active general purpose operational amplifiers in 8-SOIC packages with equivalent functional performance and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

TS271CDT Selection Criteria: The TS271CDT is an active STMicroelectronics product suitable for applications requiring the 0°C to 70°C operating temperature range matching the original TLC251CPSRG4 specification. This substitute maintains ROHS3 compliance and MSL Level 1 rating. The TS271CDT is available in production quantities (7801 Pcs in stock) and is supplied in Cut Tape and Digi-Reel® packaging formats.

TS271IDT Selection Criteria: The TS271IDT is an active STMicroelectronics product with extended operating temperature range (-40°C to 125°C), providing broader thermal performance than the original device. This substitute is suitable for applications requiring enhanced temperature performance while maintaining ROHS3 compliance and MSL Level 1 rating. The TS271IDT is available in production quantities (5012 Pcs in stock) and is supplied in Cut Tape and Digi-Reel® packaging formats.

Package Consideration: Both substitute parts utilize 8-SOIC packages with reduced body width (0.154", 3.90mm) compared to the original TLC251CPSRG4 (0.209", 5.30mm). PCB layout verification is required to confirm footprint compatibility with existing designs.

Supply Voltage Consideration: The substitute parts specify a minimum supply voltage of 3 V, compared to the original device minimum of 1.4 V. Applications requiring operation below 3 V supply voltage cannot use these substitutes.

Frequently Asked Questions (FAQ)

Q: Can TS271CDT and TS271IDT be used interchangeably with TLC251CPSRG4?

A: Both TS271CDT and TS271IDT are functionally equivalent general purpose operational amplifiers with matching input offset voltage (1.1 mV) and single circuit configuration. However, the minimum supply voltage requirement differs: substitutes require 3 V minimum versus 1.4 V for the original. PCB footprint verification is required due to package body width differences (0.154" versus 0.209").

Q: What are the key electrical differences between the substitute parts and the original?

A: The substitute parts exhibit lower slew rate (0.04 V/µs versus 5.3 V/µs) and lower gain bandwidth product (0.1 MHz versus 2.2 MHz). Supply current is significantly reduced (10 µA versus 950 µA). These differences indicate the substitutes are optimized for low-power operation rather than high-speed applications.

Q: Which substitute should be selected for new designs?

A: Selection depends on operating temperature requirements. For applications within 0°C to 70°C, either TS271CDT or TS271IDT is acceptable. For applications requiring extended temperature performance (-40°C to 125°C), TS271IDT is the appropriate selection. Both parts maintain ROHS3 compliance and MSL Level 1 rating.

Q: Are there package compatibility concerns?

A: Yes. The substitute parts use 8-SOIC packages with 0.154" body width, while the original uses 0.209" body width. Although both are 8-pin SOIC packages, PCB footprint verification is mandatory before design implementation to ensure pad alignment and clearance compatibility.

Q: What is the supply voltage compatibility range?

A: The original TLC251CPSRG4 operates from 1.4 V to 16 V. The substitute parts (TS271CDT and TS271IDT) operate from 3 V to 16 V. Applications requiring supply voltages between 1.4 V and 3 V cannot use the substitute parts.

Q: Are the substitute parts available in production quantities?

A: Yes. TS271CDT has 7801 Pcs in stock, and TS271IDT has 5012 Pcs in stock. Both are supplied in Cut Tape and Digi-Reel® packaging formats suitable for automated assembly processes.