MCP624-E/ST Equivalent & Substitute Parts Reference

Part Overview

The MCP624-E/ST is a general-purpose operational amplifier manufactured by Microchip Technology, featuring four independent circuits in a 14-TSSOP surface-mount package. This rail-to-rail amplifier is designed for low-power applications requiring moderate bandwidth and precision input characteristics. The device operates across a 2.5V to 5.5V supply range with an operating temperature range of -40°C to 125°C.

The MCP624-E/ST maintains Active product status with 5035 units in current inventory. Substitute parts are identified for applications where alternative manufacturers' components meet the electrical and mechanical specifications, or where supply chain considerations necessitate equivalent alternatives.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	10	V/µs
Gain Bandwidth Product	20	MHz
Current - Input Bias	5	pA
Voltage - Input Offset	200	µV
Current - Supply (Total)	2.5	mA
Current - Output / Channel	70	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature Range	-40 to 125	°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MCP624-E/ST is determined by the following criteria:

Primary Compatibility Requirements:

Package type: 14-TSSOP surface-mount configuration
Circuit count: 4 independent amplifier circuits
Output configuration: Rail-to-rail output capability
Supply voltage range: Minimum 2.5V, maximum 5.5V
Operating temperature: Support for -40°C to 125°C range
Compliance: ROHS3 and REACH compliance status

Electrical Performance Considerations: Substitute parts are grouped based on amplifier type (General Purpose vs. CMOS) and performance characteristics including slew rate, gain-bandwidth product, input bias current, and output current capability. Parts with lower slew rates or reduced bandwidth may be suitable for applications not requiring the full 10V/µs and 20MHz specifications of the MCP624-E/ST.

Identified Substitute Categories:

Direct General-Purpose Substitutes (Microchip and Texas Instruments LMV324 series): Maintain similar general-purpose amplifier topology with rail-to-rail output and comparable supply voltage ranges.
Low-Power CMOS Alternatives (Texas Instruments LMV344 series and OPA4348AQPWRQ1): Offer reduced supply current consumption with CMOS input stage characteristics, suitable for power-constrained applications.
Rohm Semiconductor Alternatives (BD12734FVJ-E2 and LMR934FVJ-E2): Provide general-purpose amplification with extended low-voltage operation (1.8V minimum) and reduced supply current.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA/nA)	Supply Current (mA/µA)	Output Current/Ch (mA)	Temp Range (°C)	Product Status
MCP624-E/ST	Microchip	General Purpose	10	20	5 pA	2.5 mA	70	-40 to 125	Active
BD12734FVJ-E2	Rohm	General Purpose	0.4	1	50 nA	1.2 mA	12	-40 to 85	Active
LMR934FVJ-E2	Rohm	General Purpose	0.35	1.4	5 nA	250 µA	90	-40 to 85	Active
LMV324Q1MTX/NOPB	Texas Instruments	General Purpose	1	1	15 nA	410 µA	160	-40 to 125	Active
LMV324Q3MT/NOPB	Texas Instruments	General Purpose	1	1	15 nA	410 µA	160	-40 to 85	Active
LMV344IPW	Texas Instruments	CMOS	1	1	1 pA	107 µA	113	-40 to 125	Last Time Buy
LMV344IPWR	Texas Instruments	CMOS	1	1	1 pA	107 µA	113	-40 to 125	Active
OPA4348AQPWRQ1	Texas Instruments	CMOS	0.5	1	8 pA	45 µA	10	-40 to 125	Active

Engineering Selection Recommendations

For Full Temperature Range Operation (-40°C to 125°C):

Select from parts maintaining the complete -40°C to 125°C operating temperature specification: MCP624-E/ST (primary), LMV324Q1MTX/NOPB, LMV344IPW, LMV344IPWR, or OPA4348AQPWRQ1. These parts are suitable for applications requiring extended temperature performance without derating.

For Automotive Applications:

LMV324Q1MTX/NOPB and OPA4348AQPWRQ1 carry AEC-Q100 automotive qualification. These parts are appropriate for automotive-grade system designs requiring formal qualification documentation.

For Active Product Status:

All substitute parts except LMV344IPW maintain Active product status. LMV344IPW is designated Last Time Buy and should be avoided for new designs requiring long-term supply assurance.

For Low-Power Supply Current Applications:

OPA4348AQPWRQ1 (45µA total) and LMR934FVJ-E2 (250µA total) provide the lowest supply current consumption. These are suitable for battery-powered or energy-constrained applications where the reduced slew rate and bandwidth do not impact system performance.

For Extended Low-Voltage Operation:

BD12734FVJ-E2 and LMR934FVJ-E2 support operation down to 1.8V minimum supply voltage, compared to 2.5V for the MCP624-E/ST. These parts enable designs requiring lower supply voltage thresholds.

For High Output Current Capability:

LMV324Q1MTX/NOPB provides 160mA per channel output current, exceeding the MCP624-E/ST specification of 70mA. This part is suitable for applications requiring higher load-driving capability.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MCP624-E/ST with any of these parts in my existing design?

A: Substitution requires verification that the substitute part's electrical specifications meet or exceed your application requirements. The MCP624-E/ST provides 10V/µs slew rate and 20MHz bandwidth; substitute parts with lower values may not be suitable for high-speed applications. Package compatibility (14-TSSOP) is confirmed for all listed substitutes.

Q: What is the difference between General Purpose and CMOS amplifier types in this list?

A: General Purpose amplifiers (MCP624, BD12734, LMR934, LMV324 series) use bipolar input stages with higher input bias currents (5pA to 50nA). CMOS amplifiers (LMV344, OPA4348) feature CMOS input stages with extremely low input bias currents (1pA to 8pA), reducing input current errors in high-impedance circuits. CMOS types also consume significantly less supply current.

Q: Why do some substitutes have reduced operating temperature ranges?

A: BD12734FVJ-E2 and LMR934FVJ-E2 are specified to -40°C to 85°C, while the MCP624-E/ST extends to 125°C. Applications requiring operation above 85°C must use parts with extended temperature specifications. LMV324Q3MT/NOPB also limits to 85°C maximum.

Q: Is the LMV344IPW suitable for new designs?

A: LMV344IPW carries Last Time Buy status, indicating the manufacturer is discontinuing this part. New designs should select from Active status parts: LMV344IPWR (identical electrical specifications, different packaging), or alternative CMOS options like OPA4348AQPWRQ1.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry qualification standard. LMV324Q1MTX/NOPB and OPA4348AQPWRQ1 carry this qualification, making them suitable for automotive applications requiring formal supplier qualification documentation. Non-qualified parts may not be acceptable for automotive system designs.

Q: Can I use a substitute with lower slew rate in my application?

A: Slew rate determines the maximum rate of output voltage change. The MCP624-E/ST provides 10V/µs; substitutes range from 0.35V/µs to 1V/µs. Lower slew rates limit performance in applications requiring fast signal transitions or high-frequency amplification. Verify your application's slew rate requirement before selecting a lower-specification substitute.

Q: What is the significance of Moisture Sensitivity Level (MSL)?

A: MSL 1 (unlimited) indicates the part has no moisture sensitivity restrictions and does not require special handling or baking procedures before soldering. All listed parts carry MSL 1 or MSL 3 (168 hours). MSL 3 parts require controlled moisture exposure and may need baking before assembly.

Q: Are all these parts RoHS3 compliant?

A: Yes, all listed parts carry ROHS3 Compliant status and are REACH Unaffected, meeting current environmental and hazardous substance regulations for electronic components.

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