MCP619T-I/ST Equivalent & Substitute Parts

Part Overview

The MCP619T-I/ST is a CMOS 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 MCP619T-I/ST serves applications requiring low-power CMOS amplification with rail-to-rail output capability across supply voltages from 2.3 V to 5.5 V. Equivalent and substitute parts are identified for applications where alternative sourcing, packaging formats, or enhanced performance characteristics are required while maintaining functional compatibility within the 14-TSSOP package footprint.

Key Parameters

Parameter	MCP619T-I/ST Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	0.08	V/µs
Gain Bandwidth Product	190	kHz
Current - Input Bias	5	nA
Voltage - Input Offset	150	µV
Current - Supply (x4 Channels)	19	µA
Current - Output / Channel	17	mA
Voltage - Supply Span (Min)	2.3	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 85	°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MCP619T-I/ST are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates share the following mandatory parameters:

Mechanical Compatibility:

Package type: 14-TSSOP surface mount
Package dimensions: 0.173" width, 4.40mm width
Mounting type: Surface Mount

Electrical Compatibility:

Number of circuits: 4 operational amplifiers per package
Output configuration: Rail-to-Rail output capability
Supply voltage range: Minimum 2.3 V to maximum 5.5 V overlap required
Operating temperature range: Minimum -40°C overlap required

Functional Characteristics:

Amplifier topology: CMOS or General Purpose operational amplifier
Input bias current: ≤ 50 nA (low-input-bias CMOS or precision types acceptable)
Input offset voltage: ≤ 1.7 mV
Output current per channel: ≥ 10 mA

Substitutes are grouped by amplifier type (CMOS vs. General Purpose) and performance tier. Direct equivalents maintain identical electrical specifications. Enhanced substitutes provide superior performance in slew rate, gain-bandwidth product, or output current while remaining functionally compatible.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
MCP619T-I/ST	Microchip	CMOS	0.08	190	5	150	19	17	2.3	5.5	-40 to 85	14-TSSOP
MCP619-I/ST	Microchip	CMOS	0.08	190	5	150	19	17	2.3	5.5	-40 to 85	14-TSSOP
BD12734FVJ-E2	Rohm	General Purpose	0.4	1000	50	1000	1200	12	1.8	5.0	-40 to 85	14-TSSOP-BJ
LMP2234BMT/NOPB	Texas Instruments	General Purpose	0.048	130	0.02	10	36	30	1.6	5.5	-40 to 125	14-TSSOP
LMP2234BMTX/NOPB	Texas Instruments	General Purpose	0.048	130	0.02	10	36	30	1.6	5.5	-40 to 125	14-TSSOP
LMR934FVJ-E2	Rohm	General Purpose	0.35	1400	5	1000	250	90	1.8	5.0	-40 to 85	14-TSSOP-BJ
LMV324Q1MTX/NOPB	Texas Instruments	General Purpose	1.0	1000	15	1700	410	160	2.7	5.5	-40 to 125	14-TSSOP
LMV324Q3MT/NOPB	Texas Instruments	General Purpose	1.0	1000	15	1700	410	160	2.7	5.5	-40 to 85	14-TSSOP
LMV824Q1MT/NOPB	Texas Instruments	General Purpose	1.4	5600	40	1000	1000	45	2.5	5.5	-40 to 125	14-TSSOP
LMV824Q1MTX/NOPB	Texas Instruments	General Purpose	1.4	5600	40	1000	1000	45	2.5	5.5	-40 to 125	14-TSSOP
OPA4348AQPWRQ1	Texas Instruments	CMOS	0.5	1000	8	1000	45	10	2.1	5.5	-40 to 125	14-TSSOP

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications):

MCP619-I/ST is a direct equivalent to MCP619T-I/ST, differing only in packaging format (Tube vs. Tape & Reel). Both are manufactured by Microchip Technology with identical electrical and thermal characteristics. Selection between these two depends on procurement and assembly requirements.

CMOS Amplifier Substitutes:

OPA4348AQPWRQ1 (Texas Instruments) is a CMOS amplifier substitute offering enhanced performance. It maintains CMOS amplifier topology with improved slew rate (0.5 V/µs vs. 0.08 V/µs) and higher gain-bandwidth product (1 MHz vs. 190 kHz). This device is AEC-Q100 qualified for automotive applications and supports extended operating temperature range (-40°C to 125°C). Supply current is higher (45 µA vs. 19 µA), and output current per channel is lower (10 mA vs. 17 mA). The OPA4348AQPWRQ1 is suitable for applications requiring faster signal processing while accepting increased power consumption.

General Purpose Amplifier Substitutes:

General Purpose amplifier substitutes provide alternative sourcing from Rohm Semiconductor and Texas Instruments. These devices maintain 4-circuit configuration and 14-TSSOP packaging but offer varying performance characteristics:

BD12734FVJ-E2 (Rohm): Moderate performance enhancement with 0.4 V/µs slew rate and 1 MHz gain-bandwidth product. Supply current increases to 1.2 mA. Output current per channel reduces to 12 mA. Minimum supply voltage requirement increases to 1.8 V.
LMR934FVJ-E2 (Rohm): Higher performance option with 0.35 V/µs slew rate, 1.4 MHz gain-bandwidth product, and 90 mA output current per channel. Supply current requirement is 250 µA. Minimum supply voltage is 1.8 V.
LMP2234BMT/NOPB and LMP2234BMTX/NOPB (Texas Instruments): Precision amplifiers with ultra-low input bias current (0.02 pA) and minimal input offset voltage (10 µV). Extended operating temperature range to 125°C. Slew rate is lower (0.048 V/µs), and supply current is 36 µA. Output current per channel is 30 mA. Minimum supply voltage is 1.6 V.
LMV324Q1MTX/NOPB and LMV324Q3MT/NOPB (Texas Instruments): General purpose amplifiers with 1 V/µs slew rate and 1 MHz gain-bandwidth product. AEC-Q100 qualified for automotive applications. Supply current is 410 µA, and output current per channel is 160 mA. Operating temperature range extends to 125°C (Q1MTX variant). Minimum supply voltage is 2.7 V.
LMV824Q1MT/NOPB and LMV824Q1MTX/NOPB (Texas Instruments): High-performance general purpose amplifiers with 1.4 V/µs slew rate and 5.6 MHz gain-bandwidth product. AEC-Q100 qualified. Supply current is 1 mA, and output current per channel is 45 mA. Operating temperature range extends to 125°C. Minimum supply voltage is 2.5 V.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Automotive-grade substitutes (LMV324 and LMV824 series, OPA4348AQPWRQ1) carry AEC-Q100 qualification. Moisture sensitivity level is MSL 1 (Unlimited) for all parts except OPA4348AQPWRQ1, which is MSL 3 (168 Hours).

Frequently Asked Questions (FAQ)

Q: Can MCP619-I/ST replace MCP619T-I/ST directly?

A: Yes. MCP619-I/ST is a direct electrical equivalent with identical specifications. The difference is packaging format: MCP619-I/ST is supplied in Tube packaging, while MCP619T-I/ST is supplied in Tape & Reel format. Selection depends on assembly line requirements and procurement preferences.

Q: What is the primary difference between CMOS and General Purpose amplifier substitutes?

A: CMOS amplifiers (MCP619T-I/ST and OPA4348AQPWRQ1) feature extremely low input bias current (5 nA and 8 pA respectively) and minimal supply current consumption. General Purpose amplifiers typically have higher input bias current (15 nA to 50 nA) but may offer superior slew rate and gain-bandwidth product. CMOS topology is preferred for high-impedance input applications and battery-powered systems.

Q: Is the OPA4348AQPWRQ1 a direct replacement for MCP619T-I/ST?

A: OPA4348AQPWRQ1 is functionally compatible but not a direct replacement. Both are CMOS 4-circuit amplifiers in 14-TSSOP packages with rail-to-rail output. However, OPA4348AQPWRQ1 has higher supply current (45 µA vs. 19 µA), lower output current per channel (10 mA vs. 17 mA), and superior slew rate (0.5 V/µs vs. 0.08 V/µs). Circuit redesign may be required if output current or power consumption are critical parameters.

Q: Can I use LMV824Q1MTX/NOPB in place of MCP619T-I/ST?

A: LMV824Q1MTX/NOPB is mechanically and electrically compatible but represents a performance upgrade. It offers significantly higher slew rate (1.4 V/µs vs. 0.08 V/µs), gain-bandwidth product (5.6 MHz vs. 190 kHz), and output current per channel (45 mA vs. 17 mA). Supply current is higher (1 mA vs. 19 µA). This substitute is suitable for applications requiring faster signal processing and higher output drive capability. Minimum supply voltage requirement increases to 2.5 V.

Q: What are the packaging differences among substitute parts?

A: All substitute parts use 14-TSSOP surface mount package with 0.173" width and 4.40mm width. Mechanical footprint is identical. Packaging format differs: some are supplied in Tube, others in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel format. These differences affect procurement and assembly processes but do not impact electrical compatibility or PCB layout.

Q: Are automotive-grade substitutes required for my application?

A: Automotive-grade substitutes (LMV324, LMV824, and OPA4348AQPWRQ1 series) carry AEC-Q100 qualification and extended operating temperature range (-40°C to 125°C). These are required only for automotive applications or systems requiring AEC-Q100 certification. Standard industrial-grade parts (MCP619, BD12734, LMR934, LMP2234) are suitable for consumer and industrial applications with -40°C to 85°C operating range.

Q: What is the impact of supply voltage range differences?

A: MCP619T-I/ST operates from 2.3 V to 5.5 V. Some substitutes have different minimum supply voltage requirements: BD12734FVJ-E2 and LMR934FVJ-E2 require minimum 1.8 V, LMP2234 series requires 1.6 V, LMV324 series requires 2.7 V, and LMV824 series requires 2.5 V. If your application uses supply voltages below 2.3 V, only LMP2234 series (1.6 V minimum) is compatible. If supply voltage is below 1.8 V, no substitute is available.

Q: How do input offset voltage differences affect circuit performance?

A: MCP619T-I/ST has 150 µV input offset voltage. Most general purpose substitutes have 1 mV (1000 µV) offset voltage, representing a 6.7× increase. LMP2234 series offers superior precision with 10 µV offset voltage. For precision analog applications requiring minimal DC offset, LMP2234 series is preferred. For general signal conditioning and filtering applications, the 1 mV offset of general purpose amplifiers is typically acceptable.

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

A: MCP619T-I/ST and all substitutes except OPA4348AQPWRQ1 are MSL 1 (Unlimited), meaning they have no moisture sensitivity restrictions and can be stored indefinitely without desiccant packaging. OPA4348AQPWRQ1 is MSL 3 (168 Hours), requiring storage in desiccant packaging and limiting shelf life to 168 hours after opening. This affects procurement, storage, and assembly planning for high-volume production.

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