MCP634T-E/ST Equivalent & Substitute Parts

Part Overview

The MCP634T-E/ST is a general-purpose operational amplifier manufactured by Microchip Technology, configured as a 4-circuit rail-to-rail amplifier in a 14-TSSOP surface-mount package. This device is classified as Active product status and is ROHS3 compliant. The MCP634T-E/ST is specified for applications requiring moderate bandwidth performance with a gain-bandwidth product of 24 MHz and slew rate of 10V/µs across an operating temperature range of -40°C to 125°C. Substitute parts are identified when equivalent functional performance, package compatibility, and compliance certifications align with the original specification, enabling component interchangeability in production and design environments.

Key Parameters

Parameter	MCP634T-E/ST
Manufacturer	Microchip Technology
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	5.5 V
Operating Temperature	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MCP634T-E/ST are qualified based on the following criteria:

Package Compatibility: All substitute parts must be housed in a 14-TSSOP surface-mount package with identical 0.173" (4.40mm) width to ensure direct PCB footprint compatibility.

Functional Configuration: All substitute parts must provide 4 independent operational amplifier circuits with rail-to-rail output capability.

Supply Voltage Range: Substitute parts must operate within the MCP634T-E/ST supply voltage envelope of 2.5V to 5.5V minimum and maximum, or demonstrate overlap within this range.

Operating Temperature Range: Substitute parts must support the full -40°C to 125°C operating temperature range or a subset thereof that covers the intended application environment.

Compliance & Status: All substitute parts must maintain Active product status and ROHS3 compliance to ensure long-term availability and regulatory alignment.

Electrical Performance: Substitute parts are grouped by amplifier type (General Purpose or CMOS) and bandwidth characteristics. Parts with lower bandwidth (1 MHz to 1.4 MHz) are suitable for applications not requiring the MCP634T-E/ST's 24 MHz gain-bandwidth product.

Parameter Comparison

Parameter	MCP634T-E/ST	BD12734FVJ-E2	LMR934FVJ-E2	LMV324Q1MTX/NOPB	LMV324Q3MT/NOPB	OPA4348AQPWRQ1
Manufacturer	Microchip Technology	Rohm Semiconductor	Rohm Semiconductor	Texas Instruments	Texas Instruments	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-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	10V/µs	0.4V/µs	0.35V/µs	1V/µs	1V/µs	0.5V/µs
Gain Bandwidth Product	24 MHz	1 MHz	1.4 MHz	1 MHz	1 MHz	1 MHz
Current - Input Bias	4 pA	50 nA	5 nA	15 nA	15 nA	8 pA
Voltage - Input Offset	1.8 mV	1 mV	1 mV	1.7 mV	1.7 mV	1 mV
Current - Supply	2.5mA (x4 Channels)	1.2mA	250µA	410µA (x4 Channels)	410µA (x4 Channels)	45µA (x4 Channels)
Current - Output / Channel	85 mA	12 mA	90 mA	160 mA	160 mA	10 mA
Voltage - Supply Span (Min)	2.5 V	1.8 V	1.8 V	2.7 V	2.7 V	2.1 V
Voltage - Supply Span (Max)	5.5 V	5 V	5 V	5.5 V	5.5 V	5.5 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

LMV324Q1MTX/NOPB (Texas Instruments): This substitute maintains full compatibility with the MCP634T-E/ST across the complete -40°C to 125°C operating temperature range and 2.7V to 5.5V supply voltage span. The LMV324Q1MTX/NOPB is AEC-Q100 qualified for automotive applications and carries Active product status with ROHS3 compliance. The 14-TSSOP package and Tape & Reel packaging format ensure direct PCB footprint compatibility. This part is suitable for applications where the MCP634T-E/ST's higher bandwidth is not required.

LMV324Q3MT/NOPB (Texas Instruments): This substitute provides identical electrical specifications to the LMV324Q1MTX/NOPB with AEC-Q100 automotive qualification and Active product status. The operating temperature range is limited to -40°C to 85°C, which restricts use to applications not requiring the full 125°C upper temperature limit. Tube packaging differs from the MCP634T-E/ST's Tape & Reel format but maintains 14-TSSOP package compatibility. ROHS3 compliance and MSL 1 rating are maintained.

LMR934FVJ-E2 (Rohm Semiconductor): This substitute offers the lowest supply current consumption at 250µA total and maintains output current capability of 90 mA per channel, matching the MCP634T-E/ST. The 1.4 MHz gain-bandwidth product and 0.35V/µs slew rate are suitable for low-frequency applications. Operating temperature range is limited to -40°C to 85°C, and supply voltage minimum is 1.8V. Cut Tape & Digi-Reel packaging differs from the original format. ROHS3 compliance and MSL 1 rating are maintained.

BD12734FVJ-E2 (Rohm Semiconductor): This substitute provides the lowest supply current at 1.2mA total but limits output current to 12 mA per channel. The 1 MHz bandwidth and 0.4V/µs slew rate are suitable for low-frequency signal conditioning. Operating temperature range is -40°C to 85°C with 1.8V to 5V supply span. Cut Tape & Digi-Reel packaging differs from the original format. ROHS3 compliance and MSL 1 rating are maintained.

OPA4348AQPWRQ1 (Texas Instruments): This CMOS amplifier substitute provides the lowest supply current consumption at 45µA total and maintains full -40°C to 125°C operating temperature range with 2.1V to 5.5V supply span. AEC-Q100 automotive qualification and Active product status are confirmed. The 14-TSSOP package ensures PCB compatibility. However, MSL rating is 3 (168 Hours), requiring controlled moisture exposure during storage and handling. Output current is limited to 10 mA per channel. ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can the BD12734FVJ-E2 directly replace the MCP634T-E/ST in all applications?

A: The BD12734FVJ-E2 shares the 14-TSSOP package and 4-circuit rail-to-rail configuration. However, the output current per channel is limited to 12 mA compared to the MCP634T-E/ST's 85 mA. Applications requiring higher output current cannot use this substitute. Additionally, the operating temperature range is limited to -40°C to 85°C, restricting use in applications requiring 125°C operation.

Q: What is the primary difference between the LMV324Q1MTX/NOPB and LMV324Q3MT/NOPB?

A: Both parts are electrically identical with identical electrical specifications and AEC-Q100 automotive qualification. The primary difference is packaging format: LMV324Q1MTX/NOPB is supplied in Tape & Reel format, while LMV324Q3MT/NOPB is supplied in Tube format. The LMV324Q3MT/NOPB operating temperature range is limited to -40°C to 85°C, whereas the LMV324Q1MTX/NOPB supports the full -40°C to 125°C range.

Q: Is the OPA4348AQPWRQ1 suitable for high-current output applications?

A: No. The OPA4348AQPWRQ1 provides only 10 mA output current per channel, significantly lower than the MCP634T-E/ST's 85 mA. This substitute is suitable for low-current signal conditioning and buffering applications. Applications requiring 85 mA output current per channel should use the LMR934FVJ-E2 (90 mA) or LMV324Q1MTX/NOPB (160 mA).

Q: What does MSL 3 (168 Hours) mean for the OPA4348AQPWRQ1?

A: MSL 3 indicates the component requires moisture control during storage and handling. The component can be exposed to ambient conditions for a maximum of 168 hours (7 days) before soldering. After this period, the component must be baked at specified temperature and humidity conditions to remove absorbed moisture. The MCP634T-E/ST and all other substitutes carry MSL 1 (Unlimited), requiring no moisture control.

Q: Can I use the LMR934FVJ-E2 in a -40°C to 125°C application?

A: No. The LMR934FVJ-E2 operating temperature range is limited to -40°C to 85°C. Applications requiring operation at temperatures above 85°C must use the LMV324Q1MTX/NOPB or OPA4348AQPWRQ1, both of which support -40°C to 125°C operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (BD12734FVJ-E2, LMR934FVJ-E2, LMV324Q1MTX/NOPB, LMV324Q3MT/NOPB, and OPA4348AQPWRQ1) are ROHS3 compliant, matching the MCP634T-E/ST compliance status.

Q: What is the key difference between the MCP634T-E/ST and the substitute parts in terms of bandwidth?

A: The MCP634T-E/ST provides 24 MHz gain-bandwidth product with 10V/µs slew rate, making it suitable for higher-frequency applications. All substitute parts provide 1 MHz to 1.4 MHz bandwidth with 0.35V/µs to 1V/µs slew rates. Substitute parts are suitable for low-frequency signal conditioning, filtering, and buffering applications where the MCP634T-E/ST's higher bandwidth is not required.

Q: Do all substitute parts support the full 2.5V to 5.5V supply voltage range of the MCP634T-E/ST?

A: No. The BD12734FVJ-E2 and LMR934FVJ-E2 support 1.8V to 5V supply range, which does not include the 2.5V minimum of the MCP634T-E/ST. The LMV324Q1MTX/NOPB and LMV324Q3MT/NOPB support 2.7V to 5.5V, and the OPA4348AQPWRQ1 supports 2.1V to 5.5V. Applications requiring 2.5V minimum supply voltage should use the LMV324Q1MTX/NOPB or OPA4348AQPWRQ1.

Q: Are the substitute parts available in the same packaging format as the MCP634T-E/ST?

A: The MCP634T-E/ST is supplied in Tape & Reel (TR) format. The LMV324Q1MTX/NOPB and OPA4348AQPWRQ1 are also supplied in Tape & Reel format. The BD12734FVJ-E2 and LMR934FVJ-E2 are supplied in Cut Tape (CT) & Digi-Reel® format. The LMV324Q3MT/NOPB is supplied in Tube format. All parts use the 14-TSSOP package with identical PCB footprint.

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