TLC2274ACN Equivalent & Substitute Parts

Part Overview

The TLC2274ACN is a general-purpose operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-PDIP through-hole package. This device is classified as Active product status and is RoHS3 compliant. The TLC2274ACN serves applications requiring rail-to-rail output capability with moderate slew rate performance across industrial and commercial temperature ranges (0°C to 70°C).

Substitute parts become necessary when the TLC2274ACN reaches end-of-life status, inventory depletion occurs, or application requirements demand alternative electrical characteristics such as lower supply current consumption or extended temperature operation.

Substiute Parts

TLC2274ACN

Texas InstrumentsIn Stock: 1966TLC2274ACN Datasheet

Current PartRFQ

LMC660AIN/NOPB

Texas InstrumentsIn Stock: 2116LMC660AIN/NOPB Datasheet

MFR RecommendedRFQ

LMC660CN/NOPB

National SemiconductorIn Stock: 1444LMC660CN/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLC2274ACN is determined by the following mandatory criteria:

Mechanical Compatibility:

• Package type must be 14-DIP (0.300", 7.62mm)
• Mounting type must be Through Hole
• Pin count and physical dimensions must match

Functional Compatibility:

• Number of circuits must equal 4
• Output type must include Rail-to-Rail capability
• Supply voltage range must overlap with or encompass the original specification (4.4V to 16V minimum)
• Current output per channel must meet or exceed 40 mA minimum

Electrical Performance Boundaries:

• Input bias current must not exceed 1 pA (lower values acceptable)
• Input offset voltage must not exceed 1 mV (higher values acceptable for CMOS variants)
• Supply current consumption may be lower than original specification

The substitute parts LMC660AIN/NOPB and LMC660CN/NOPB meet these criteria as CMOS amplifier variants with identical package configuration and four-circuit configuration.

Parameter Comparison

Engineering Selection Recommendations

LMC660AIN/NOPB Selection Criteria:

The LMC660AIN/NOPB is manufactured by Texas Instruments and maintains ROHS3 compliance identical to the TLC2274ACN. This substitute carries Last Time Buy product status, indicating controlled availability. The extended operating temperature range (-40°C to 85°C) provides broader environmental coverage compared to the original part. Supply current consumption is reduced to 1.5 mA across four channels, representing a 69% reduction from the TLC2274ACN specification. This substitute is suitable for applications where lower power consumption is beneficial and slew rate reduction from 3.6 V/µs to 1.1 V/µs is acceptable.

LMC660CN/NOPB Selection Criteria:

The LMC660CN/NOPB is manufactured by National Semiconductor and carries Active product status with identical operating temperature range to the TLC2274ACN (0°C to 70°C). This substitute does not maintain ROHS3 compliance and carries RoHS non-compliant status. Supply current consumption matches the LMC660AIN/NOPB at 1.5 mA. This substitute is applicable only in applications where RoHS compliance is not a regulatory requirement.

Compliance Considerations:

Applications subject to RoHS3 regulatory requirements must select LMC660AIN/NOPB. Applications without RoHS compliance mandates may select either substitute based on product status and availability requirements.

Frequently Asked Questions (FAQ)

Q: Can LMC660AIN/NOPB or LMC660CN/NOPB be directly substituted for TLC2274ACN without circuit modification?

A: Direct substitution is mechanically and functionally compatible due to identical 14-DIP package configuration, four-circuit count, and rail-to-rail output capability. However, electrical performance differences exist: slew rate decreases from 3.6 V/µs to 1.1 V/µs, and gain bandwidth product decreases from 2.25 MHz to 1.4 MHz. Applications sensitive to these parameters require circuit evaluation.

Q: What is the primary difference between LMC660AIN/NOPB and LMC660CN/NOPB?

A: Both parts are electrically identical CMOS amplifiers with matching electrical specifications. The primary differences are: (1) LMC660AIN/NOPB is manufactured by Texas Instruments with ROHS3 compliance and Last Time Buy status; (2) LMC660CN/NOPB is manufactured by National Semiconductor with RoHS non-compliant status and Active product status. Operating temperature ranges differ: LMC660AIN/NOPB operates -40°C to 85°C, while LMC660CN/NOPB operates 0°C to 70°C.

Q: Does the reduced slew rate of substitute parts affect circuit performance?

A: Slew rate reduction from 3.6 V/µs to 1.1 V/µs affects the maximum rate of output voltage change. Applications requiring high-speed signal processing or fast transient response may experience performance degradation. Applications with bandwidth requirements below 1.4 MHz are unaffected.

Q: Are the supply voltage ranges compatible?

A: The substitute parts operate within a slightly narrower supply voltage range: minimum 4.75 V (versus 4.4 V for TLC2274ACN) and maximum 15.5 V (versus 16 V for TLC2274ACN). Circuits designed for the full 4.4 V to 16 V range of the TLC2274ACN must be evaluated for compatibility with the 4.75 V to 15.5 V range of substitute parts.

Q: What is the significance of the reduced supply current consumption in substitute parts?

A: Supply current consumption decreases from 4.8 mA to 1.5 mA across four channels, representing a 69% reduction. This reduction benefits battery-powered applications and reduces thermal dissipation requirements. No circuit modification is required to achieve this benefit.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: LMC660AIN/NOPB is the only substitute maintaining ROHS3 compliance. LMC660CN/NOPB is RoHS non-compliant and must not be used in applications subject to RoHS regulatory requirements.

Q: Is the output current capability of substitute parts sufficient?

A: Output current per channel decreases from 50 mA to 40 mA. Applications requiring output currents exceeding 40 mA per channel cannot use these substitutes. Applications within the 40 mA specification are compatible.