MCP634T-E/SL Equivalent & Substitute Parts

Part Overview

The MCP634T-E/SL is a general purpose operational amplifier manufactured by Microchip Technology, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as Active product status and is ROHS3 compliant. The MCP634T-E/SL operates across a supply voltage range of 2.5V to 5.5V with an operating temperature range of -40°C to 125°C, making it suitable for industrial and commercial applications. Equivalent and substitute parts are identified based on matching functional circuit count, output type, package form factor, and electrical performance parameters within acceptable operational ranges.

Key Parameters

Parameter	Value	Unit
Manufacturer	Microchip Technology	—
Part Number	MCP634T-E/SL	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Slew Rate	10	V/µs
Gain Bandwidth Product	24	MHz
Current - Input Bias	4	pA
Voltage - Input Offset	1.8	mV
Current - Supply	2.5	mA (x4 Channels)
Current - Output / Channel	85	mA
RoHS Status	ROHS3 Compliant	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitution of the MCP634T-E/SL is determined by the following critical parameters:

Primary Matching Criteria:

Number of Circuits: 4 (quad configuration required)
Output Type: Rail-to-Rail (mandatory for voltage swing capability)
Package / Case: 14-SOIC form factor (0.154" width, 3.90mm) for PCB compatibility
Mounting Type: Surface Mount (SMD)
Voltage - Supply Span: Minimum 2.5V to Maximum 5.5V overlap required
Operating Temperature: -40°C to 125°C range or subset thereof

Secondary Performance Parameters:

Slew Rate: 10V/µs (baseline; substitutes may vary)
Gain Bandwidth Product: 24 MHz (baseline; substitutes may vary)
Current - Input Bias: 4 pA (baseline; substitutes may vary)
Voltage - Input Offset: 1.8 mV (baseline; substitutes may vary)
Current - Supply: 2.5mA per 4 channels (baseline; substitutes may vary)
Current - Output / Channel: 85 mA (baseline; substitutes may vary)

Substitute parts must maintain the 14-SOIC package footprint and support the full 2.5V to 5.5V supply range. Deviations in secondary parameters are acceptable provided the substitute part remains functionally compatible within the application's electrical requirements.

Parameter Comparison

Parameter	MCP634T-E/SL	BU7244F-E2	LMR934F-GE2	LMV324Q1MAX/NOPB	NCV20034DR2G	OPA4353UA
Manufacturer	Microchip Technology	Rohm Semiconductor	Rohm Semiconductor	Texas Instruments	onsemi	Texas Instruments
Number of Circuits	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.5 V	1.8 V	1.8 V	2.7 V	1.7 V	2.5 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.0 V	5.5 V	5.5 V	5.5 V
Operating Temperature	-40 to 125°C	-40 to 85°C	-40 to 85°C	-40 to 125°C	-40 to 125°C	-40 to 85°C
Slew Rate	10 V/µs	0.4 V/µs	0.35 V/µs	1 V/µs	8 V/µs	22 V/µs
Gain Bandwidth Product	24 MHz	900 kHz	1.4 MHz	1 MHz	7 MHz	44 MHz
Current - Input Bias	4 pA	1 pA	5 nA	15 nA	1 pA	0.5 pA
Voltage - Input Offset	1.8 mV	1 mV	1 mV	1.7 mV	500 µV	3 mV
Current - Supply	2.5 mA (x4)	360 µA	250 µA	410 µA (x4)	275 µA (x4)	5.2 mA (x4)
Current - Output / Channel	85 mA	12 mA	90 mA	160 mA	96 mA	40 mA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Footprint Compatible Substitutes (14-SOIC 0.154" / 3.90mm):

The following substitute parts maintain identical 14-SOIC package dimensions and are directly compatible with PCB layouts designed for the MCP634T-E/SL:

LMV324Q1MAX/NOPB (Texas Instruments): Maintains 14-SOIC 0.154" footprint. Supports -40°C to 125°C operating temperature range. AEC-Q100 automotive qualification. Product Status: Active.
NCV20034DR2G (onsemi): Maintains 14-SOIC 0.154" footprint. Supports -40°C to 125°C operating temperature range. Product Status: Active.
OPA4353UA (Texas Instruments): Maintains 14-SOIC 0.154" footprint. Product Status: Active. Operating temperature limited to -40°C to 85°C.

Package Variant Substitutes (14-SOIC 0.173" / 4.40mm):

The following substitute parts use a wider 14-SOIC package variant and require PCB layout verification for clearance compatibility:

BU7244F-E2 (Rohm Semiconductor): 14-SOIC 0.173" footprint. Operating temperature limited to -40°C to 85°C. Product Status: Active.
LMR934F-GE2 (Rohm Semiconductor): 14-SOIC 0.173" footprint. Operating temperature limited to -40°C to 85°C. Product Status: Active.

Compliance and Certification:

All substitute parts listed maintain ROHS3 compliance and Active product status. The LMV324Q1MAX/NOPB includes AEC-Q100 automotive qualification, suitable for automotive-grade applications. All parts are REACH unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q1: Can BU7244F-E2 or LMR934F-GE2 be used as direct replacements for MCP634T-E/SL on existing PCBs?

A: BU7244F-E2 and LMR934F-GE2 use a 14-SOIC package with 0.173" width (4.40mm), compared to the MCP634T-E/SL's 0.154" width (3.90mm). While both are 14-pin SOIC packages, the wider body may cause clearance issues on PCBs designed for the narrower footprint. PCB layout verification is required before substitution.

Q2: What is the primary difference between the MCP634T-E/SL and NCV20034DR2G?

A: Both parts maintain the same 14-SOIC 0.154" footprint and support the -40°C to 125°C operating temperature range. The NCV20034DR2G offers superior slew rate (8V/µs vs. 10V/µs) and lower input offset voltage (500µV vs. 1.8mV). The MCP634T-E/SL provides higher gain bandwidth product (24MHz vs. 7MHz) and higher output current per channel (85mA vs. 96mA).

Q3: Is LMV324Q1MAX/NOPB suitable for automotive applications?

A: Yes. LMV324Q1MAX/NOPB carries AEC-Q100 automotive qualification and is rated for -40°C to 125°C operating temperature. It maintains the 14-SOIC 0.154" footprint compatible with MCP634T-E/SL PCB layouts.

Q4: Why do some substitute parts have lower operating temperature maximums?

A: BU7244F-E2, LMR934F-GE2, and OPA4353UA are rated to -40°C to 85°C maximum operating temperature, compared to the MCP634T-E/SL's -40°C to 125°C. These parts are suitable only for applications where the maximum ambient temperature does not exceed 85°C. Applications requiring 125°C operation must use MCP634T-E/SL, LMV324Q1MAX/NOPB, or NCV20034DR2G.

Q5: What does "Rail-to-Rail" output type mean for substitution purposes?

A: Rail-to-Rail output capability means the amplifier output voltage can swing to within a small margin of both positive and negative supply rails. All listed substitute parts maintain this specification, ensuring compatibility with applications requiring full supply voltage swing capability.

Q6: Are there supply voltage compatibility concerns when substituting parts?

A: The MCP634T-E/SL operates from 2.5V to 5.5V. Substitute parts LMR934F-GE2 operates from 1.8V to 5.0V (maximum 5.0V vs. 5.5V). For applications using 5.5V supply, LMR934F-GE2 is not suitable. All other listed substitutes support the full 2.5V to 5.5V range or compatible subsets.

Q7: Which substitute offers the lowest power consumption?

A: LMR934F-GE2 offers the lowest supply current at 250µA (x4 channels), compared to MCP634T-E/SL at 2.5mA (x4 channels). For power-sensitive applications, LMR934F-GE2 is preferred, provided operating temperature and package footprint requirements are met.

Q8: What is the significance of the 4-circuit configuration in substitution?

A: The "4 circuit" specification indicates a quad operational amplifier package containing four independent amplifier stages. All listed substitute parts maintain this 4-circuit configuration, ensuring pin-compatible operation in applications designed for quad amplifier packages.

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