LMC6574AIM Equivalent & Substitute Parts

Part Overview

The LMC6574AIM is a general-purpose operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-SOIC surface-mount package. This device provides push-pull, rail-to-rail output capability with a supply voltage range of 2.7V to 11V and operates across the industrial temperature range of -40°C to 85°C.

The LMC6574AIM 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 applications currently utilizing this component.

Substiute Parts

LMC6574AIM

Texas InstrumentsIn Stock: 3605LMC6574AIM Datasheet

Current PartRFQ

TS934IYDT

STMicroelectronicsIn Stock: 2014TS934IYDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMC6574AIM is determined by the following critical parameters:

Functional Requirements:

• Four independent operational amplifier circuits
• General-purpose amplifier classification
• Rail-to-rail output capability
• Surface-mount 14-SOIC package compatibility

Electrical Compatibility Criteria:

• Supply voltage range overlap (minimum 2.7V, maximum ≥11V or ≥10V)
• Input bias current within acceptable range for the application
• Output current capability per channel (≥5 mA minimum)
• Operating temperature range coverage (-40°C minimum, ≥85°C maximum)

Physical Compatibility:

• Identical package type: 14-SOIC with 0.154" (3.90mm) width
• Surface-mount technology

The TS934IYDT from STMicroelectronics meets these substitution criteria. While certain electrical parameters differ (lower slew rate, lower gain bandwidth product, lower input offset voltage), the device maintains functional equivalence for general-purpose amplifier applications requiring four circuits in a 14-SOIC package with rail-to-rail output and compatible supply voltage operation.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LMC6574AIM is classified as obsolete, while the TS934IYDT is in active production. For new designs or long-term supply assurance, the TS934IYDT is the appropriate selection.

Compliance and Certification: The TS934IYDT carries ROHS3 compliance and AEC-Q100 automotive qualification, providing enhanced regulatory alignment compared to the RoHS non-compliant LMC6574AIM. Applications requiring automotive-grade components benefit from the TS934IYDT's qualification status.

Electrical Parameter Differences: The TS934IYDT exhibits lower slew rate (0.05 V/µs versus 0.09 V/µs) and lower gain bandwidth product (100 kHz versus 220 kHz). Applications sensitive to these parameters require circuit-level evaluation. The TS934IYDT also operates to 105°C maximum junction temperature, exceeding the LMC6574AIM's 85°C limit.

Supply Voltage Consideration: The TS934IYDT maximum supply voltage is 10V, compared to 11V for the LMC6574AIM. Applications requiring operation above 10V cannot use the TS934IYDT as a direct substitute.

Package and Mounting: Both devices use identical 14-SOIC surface-mount packages, ensuring PCB layout compatibility. The TS934IYDT is supplied in Tape & Reel packaging, standard for production environments.

Frequently Asked Questions (FAQ)

Q: Can the TS934IYDT replace the LMC6574AIM in all applications?

A: The TS934IYDT is functionally equivalent for general-purpose four-circuit amplifier applications in 14-SOIC packages. However, applications requiring supply voltages above 10V, slew rates exceeding 0.05 V/µs, or gain bandwidth products above 100 kHz must be evaluated individually. The lower input offset voltage of the TS934IYDT (10 mV versus 500 µV) may require circuit adjustment in precision applications.

Q: Are the packages physically identical?

A: Yes. Both the LMC6574AIM and TS934IYDT use 14-SOIC packages with 0.154" (3.90mm) width. PCB footprints are identical, and no layout modifications are required for package substitution.

Q: What is the significance of the TS934IYDT's AEC-Q100 qualification?

A: AEC-Q100 qualification indicates the device meets automotive industry reliability and quality standards. This certification is relevant for automotive applications and environments requiring enhanced component traceability and failure rate documentation.

Q: Does the TS934IYDT's lower supply current affect circuit design?

A: The TS934IYDT draws 20 µA total supply current (4 channels) compared to 160 µA for the LMC6574AIM. This represents reduced power consumption and may improve battery-powered application performance. No circuit redesign is required; this is a beneficial characteristic.

Q: What is the impact of the TS934IYDT's lower slew rate?

A: Slew rate determines the maximum rate of output voltage change. The TS934IYDT's 0.05 V/µs slew rate is lower than the LMC6574AIM's 0.09 V/µs. Applications involving high-frequency signal switching or fast transient response require verification that the lower slew rate does not compromise performance.

Q: Is the TS934IYDT suitable for precision measurement applications?

A: The TS934IYDT's input offset voltage is 10 mV, significantly higher than the LMC6574AIM's 500 µV. Precision measurement circuits requiring low offset voltage should be evaluated for compatibility. Offset trimming or calibration may be necessary.

Q: What packaging options are available for the TS934IYDT?

A: The TS934IYDT is supplied in Tape & Reel (TR) packaging, standard for automated assembly processes. This differs from the LMC6574AIM's tube packaging but is compatible with modern production environments.