LMC6574AIN Equivalent & Substitute Parts

Part Overview

The LMC6574AIN is a general purpose operational amplifier featuring four circuits in a 14-DIP through-hole package, manufactured by Texas Instruments. This device provides push-pull, rail-to-rail output configuration with a supply voltage range of 2.7V to 11V and operates across the industrial temperature range of -40°C to 85°C.

The LMC6574AIN is classified as obsolete. Substitution is necessary for new designs, production continuity, and long-term component availability. Active alternative devices from the LinCMOS™ series provide equivalent or enhanced functionality in modern surface-mount packaging formats.

Key Parameters

Parameter	Value	Unit
Manufacturer	Texas Instruments	—
Part Number	LMC6574AIN	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Push-Pull, Rail-to-Rail	—
Slew Rate	0.09	V/µs
Gain Bandwidth Product	220	kHz
Current - Input Bias	10	pA
Voltage - Input Offset	500	µV
Current - Supply (x4 Channels)	160	µA
Current - Output / Channel	6	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	11	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	14-DIP (0.300", 7.62mm)	—
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the LMC6574AIN is determined by the following critical parameters:

Functional Equivalence Criteria:

Four operational amplifier circuits in a single package
Rail-to-rail output capability
Supply voltage range compatibility (minimum 2.7V, maximum 8V for substitutes within the LMC6574AIN's 2.7V to 11V range)
General purpose amplifier classification
Operating temperature range of -40°C to 125°C (extended range of substitutes)

Packaging Consideration: The LMC6574AIN uses through-hole 14-DIP packaging. All substitute parts transition to surface-mount 14-SOIC packaging, requiring PCB redesign and assembly process modification.

Compliance Transition: The LMC6574AIN is RoHS non-compliant and obsolete. All substitute parts are ROHS3 compliant and carry active product status, supporting modern manufacturing and regulatory requirements.

Substitute Categories:

Category 1: General Purpose Amplifiers (TLV2254 Series)

TLV2254AIDR, TLV2254IDR, TLV2254AID, TLV2254AQD, TLV2254ID
Slew Rate: 0.12 V/µs (higher than LMC6574AIN)
Gain Bandwidth Product: 200 kHz (lower than LMC6574AIN)
Input Bias Current: 1 pA (lower than LMC6574AIN)
Output Current: 50 mA per channel (higher than LMC6574AIN)
Supply Current: 140 µA (lower than LMC6574AIN)

Category 2: CMOS Amplifiers (TLV2264 Series)

TLV2264AIDR, TLV2264IDR, TLV2264AID, TLV2264AQD, TLV2264ID
Slew Rate: 0.55 V/µs (significantly higher than LMC6574AIN)
Gain Bandwidth Product: 710 kHz (significantly higher than LMC6574AIN)
Input Bias Current: 1 pA to 50 pA (lower than LMC6574AIN)
Output Current: 50 mA per channel (higher than LMC6574AIN)
Supply Current: 800 µA to 1.5 mA (higher than LMC6574AIN)

Parameter Comparison

Parameter	LMC6574AIN	TLV2254 Series	TLV2264 Series
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Number of Circuits	4	4	4
Amplifier Type	General Purpose	General Purpose	CMOS
Output Type	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.09	0.12	0.55
Gain Bandwidth Product (kHz)	220	200	710
Input Bias Current (pA)	10	1	1 to 50
Input Offset Voltage (µV)	500	200	300
Supply Current per Channel (µA)	40	35	200 to 375
Output Current per Channel (mA)	6	50	50
Supply Voltage Min (V)	2.7	2.7	2.7
Supply Voltage Max (V)	11	8	8
Operating Temperature (°C)	-40 to 85	-40 to 125	-40 to 125
Mounting Type	Through Hole	Surface Mount	Surface Mount
Package	14-DIP	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Functional Replacement (General Purpose Applications):

Select from the TLV2254 series (TLV2254AIDR, TLV2254IDR, TLV2254AID, TLV2254ID) when the application requires general purpose amplifier characteristics with minimal performance deviation. These devices maintain similar gain-bandwidth product specifications (200 kHz) and provide improved input offset voltage (200 µV vs. 500 µV). The TLV2254 series is suitable for applications where the LMC6574AIN's 220 kHz bandwidth is not a critical requirement.

For Enhanced Performance Applications:

Select from the TLV2264 series (TLV2264AIDR, TLV2264IDR, TLV2264AID, TLV2264AQD, TLV2264ID) when the application benefits from higher slew rate (0.55 V/µs) and significantly higher gain-bandwidth product (710 kHz). The TLV2264 series provides superior dynamic performance and is suitable for signal conditioning, filtering, and instrumentation applications requiring faster response times. Note that supply current consumption increases to 800 µA to 1.5 mA per channel.

Packaging and Assembly Considerations:

All substitute parts require transition from through-hole 14-DIP to surface-mount 14-SOIC packaging. This necessitates PCB redesign, updated assembly processes, and requalification of manufacturing procedures. The 14-SOIC package (0.154" width, 3.90mm) is significantly smaller than the 14-DIP package (0.300" width, 7.62mm).

Compliance and Regulatory Status:

All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and compliance with current environmental regulations. The LMC6574AIN's RoHS non-compliant status makes substitution necessary for new designs and regulated applications.

Temperature Range Extension:

Substitute parts operate across -40°C to 125°C, extending the upper operating temperature limit by 40°C compared to the LMC6574AIN (-40°C to 85°C). This provides additional thermal margin for applications in elevated ambient conditions.

Automotive Grade Options:

For automotive applications requiring AEC-Q100 qualification, select TLV2254AQD or TLV2264AQD. These devices carry automotive grade designation and AEC-Q100 qualification.

Frequently Asked Questions (FAQ)

Q1: Can I use TLV2254 and TLV2264 series interchangeably?

A: No. While both series provide four rail-to-rail amplifier circuits, they differ in performance characteristics. TLV2254 is classified as general purpose with 200 kHz gain-bandwidth product. TLV2264 is CMOS technology with 710 kHz gain-bandwidth product and higher slew rate (0.55 V/µs vs. 0.12 V/µs). Selection depends on application bandwidth requirements and power consumption constraints.

Q2: What is the impact of changing from 14-DIP to 14-SOIC packaging?

A: The transition requires complete PCB redesign. The 14-SOIC package is surface-mount technology with significantly different footprint, pin spacing, and assembly requirements compared to through-hole 14-DIP. Manufacturing processes, soldering profiles, and quality control procedures must be updated accordingly.

Q3: Why does the LMC6574AIN have a higher maximum supply voltage (11V) than the substitutes (8V)?

A: The substitute parts are designed for modern low-voltage applications with maximum supply voltage of 8V. If your application requires operation above 8V, the LMC6574AIN cannot be substituted. Verify actual supply voltage requirements before selecting alternatives.

Q4: What is the significance of the input bias current difference (10 pA vs. 1 pA)?

A: The substitute parts provide lower input bias current, reducing errors in high-impedance input circuits and precision measurement applications. This represents an improvement over the LMC6574AIN. For most general purpose applications, this difference is not critical.

Q5: How does the output current capability affect substitution?

A: The LMC6574AIN provides 6 mA per channel output current. Substitute parts provide 50 mA per channel, representing an 8.3x improvement. This allows driving higher impedance loads or multiple stages without additional buffering. Verify that your application does not depend on the lower output current specification.

Q6: Are there packaging options for the substitute parts?

A: Yes. TLV2254 and TLV2264 series are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), and Tube. Selection depends on production volume and assembly equipment compatibility. Verify packaging availability with your supplier.

Q7: What is the impact of increased supply current in TLV2264 series?

A: TLV2264 series supply current ranges from 800 µA to 1.5 mA per channel (total 3.2 mA to 6 mA for four channels), compared to 160 µA total for LMC6574AIN. This 20x to 37x increase requires power supply redesign and thermal management evaluation. For battery-powered or low-power applications, TLV2254 series is preferred.

Q8: Can I use obsolete LMC6574AIN parts for new production?

A: No. Obsolete parts have limited availability and no long-term supply guarantee. New designs must transition to active substitute parts. Existing inventory of LMC6574AIN should be reserved for legacy product support only.

Q9: What is the difference between TLV2254AQD and TLV2254AIDR?

A: TLV2254AQD carries automotive grade designation and AEC-Q100 qualification, suitable for automotive applications. TLV2254AIDR is industrial grade. Both provide identical electrical performance. Selection depends on application requirements and automotive compliance needs.

Q10: How do I verify electrical compatibility before substitution?

A: Confirm that your application operates within the substitute part's supply voltage range (2.7V to 8V maximum). Verify that the gain-bandwidth product and slew rate meet application requirements. Confirm that output current capability (50 mA) is sufficient. Evaluate supply current impact on power budget. Perform functional testing with prototype boards before full production transition.

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