LMV344IPWG4 Equivalent & Substitute Parts

Part Overview

The LMV344IPWG4 is a CMOS amplifier integrated circuit manufactured by Texas Instruments, featuring four independent rail-to-rail operational amplifier circuits in a 14-TSSOP surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LMV344IPWG4 operates across a 2.5V to 5.5V supply range and is suitable for low-power, general-purpose amplification applications requiring rail-to-rail output capability.

Due to Last Time Buy status, identifying equivalent and substitute parts is essential for design continuity and long-term component sourcing. Substitute parts must maintain functional compatibility while accommodating potential variations in electrical performance and packaging formats.

Key Parameters

Parameter	LMV344IPWG4 Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	Channels
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	1	pA
Voltage - Input Offset	250	µV
Current - Supply (x4 Channels)	107	µA
Current - Output / Channel	113	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°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 LMV344IPWG4 are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Number of Circuits: 4 independent amplifier channels
Output Type: Rail-to-Rail capability
Package Type: 14-TSSOP surface mount form factor
Amplifier Type: CMOS technology preferred for low input bias current
Supply Voltage Range: Minimum 2.5V to 5.5V maximum
Operating Temperature: -40°C to 125°C minimum range

Secondary Performance Parameters:

Slew Rate: 1 V/µs or greater
Gain Bandwidth Product: 1 MHz or greater
Input Bias Current: 1 pA or lower
Input Offset Voltage: 250 µV or lower
Output Current per Channel: 113 mA or greater

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (Texas Instruments LMV344 Series) These parts share identical electrical specifications and base product number LMV344, differing only in packaging format (Tube, Cut Tape & Digi-Reel, or Tape & Reel) and product status. These substitutes provide seamless functional replacement with no design modifications required.

Category 2: Functional Alternatives (Cross-Manufacturer Substitutes) These parts maintain the four-circuit rail-to-rail CMOS amplifier architecture and 14-TSSOP package but may exhibit variations in secondary parameters such as slew rate, gain bandwidth product, supply current, or input offset voltage. These substitutes require verification of application-specific performance requirements.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Output Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Product Status
LMV344IPWG4	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	1	250	107	113	2.5	5.5	-40 to 125	14-TSSOP	Last Time Buy
LMV344IPW	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	1	250	107	113	2.5	5.5	-40 to 125	14-TSSOP	Last Time Buy
LMV344IPWR	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	1	250	107	113	2.5	5.5	-40 to 125	14-TSSOP	Active
LMV344MT/NOPB	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	0.02	700	107	113	2.7	5.5	-40 to 125	14-TSSOP	Active
LMV344MTX/NOPB	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	0.02	700	107	113	2.7	5.5	-40 to 125	14-TSSOP	Active
BD12734FVJ-E2	Rohm Semiconductor	General Purpose	4	Rail-to-Rail	0.4	1	50	1000	1200	12	1.8	5	-40 to 85	14-TSSOP	Active
BU7487FV-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	10	10	1	1000	6000	12	3	5.5	-40 to 105	14-LSSOP	Active
BU7487SFV-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	10	10	1	1000	6000	12	3	5.5	-40 to 105	14-LSSOP	Active
LMR344FVJ-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	1	2	1	250	400	113	2.7	5.5	-40 to 85	14-TSSOP	Active
LMR934FVJ-E2	Rohm Semiconductor	General Purpose	4	Rail-to-Rail	0.35	1.4	5	1000	250	90	1.8	5	-40 to 85	14-TSSOP	Active
MAX4403AUD+	Analog Devices Inc./Maxim Integrated	General Purpose	4	Rail-to-Rail	1	0.8	0.1	1000	410	30	2.5	5.5	-40 to 125	14-TSSOP	Active

Engineering Selection Recommendations

Tier 1: Direct Substitutes (Recommended for Seamless Replacement)

The following parts provide identical electrical specifications to the LMV344IPWG4 and require no design modifications:

LMV344IPWR (Texas Instruments): Active product status with highest inventory availability (29,278 pcs). Supplied in Cut Tape & Digi-Reel format. Recommended for new designs and high-volume production.
LMV344IPW (Texas Instruments): Active product status with substantial inventory (2,620 pcs). Supplied in Tube format. Suitable for medium-volume applications.
LMV344MT/NOPB (Texas Instruments): Active product status with 917 pcs inventory. Supplied in Tube format. Minimum supply voltage increased to 2.7V; input offset voltage increased to 700 µV.
LMV344MTX/NOPB (Texas Instruments): Active product status with 7,200 pcs inventory. Supplied in Tape & Reel format. Minimum supply voltage increased to 2.7V; input offset voltage increased to 700 µV.

All Tier 1 substitutes maintain ROHS3 compliance, MSL Level 1, and REACH Unaffected status.

Tier 2: Functional Alternatives (Application-Dependent Compatibility)

The following parts maintain four-circuit rail-to-rail amplifier architecture in 14-TSSOP package but exhibit performance variations:

LMR344FVJ-E2 (Rohm Semiconductor): CMOS amplifier with identical slew rate and input offset voltage. Gain bandwidth product increased to 2 MHz. Supply current increased to 400 µA. Operating temperature maximum reduced to 85°C. Active product status with 870 pcs inventory.
BU7487FV-E2 and BU7487SFV-E2 (Rohm Semiconductor): CMOS amplifiers with significantly enhanced performance (10 V/µs slew rate, 10 MHz gain bandwidth product). Supply current increased to 6 mA. Output current per channel reduced to 12 mA. Minimum supply voltage increased to 3V. Package variant: 14-LSSOP. Active product status.
MAX4403AUD+ (Analog Devices Inc./Maxim Integrated): General Purpose amplifier with matching supply voltage range (2.5V to 5.5V) and operating temperature range (-40°C to 125°C). Slew rate matches at 1 V/µs. Gain bandwidth product reduced to 800 kHz. Input bias current reduced to 0.1 pA. Output current per channel reduced to 30 mA. Active product status with 2,000 pcs inventory.
BD12734FVJ-E2 and LMR934FVJ-E2 (Rohm Semiconductor): General Purpose amplifiers with reduced performance specifications. Suitable only for applications with relaxed bandwidth and slew rate requirements. Operating temperature maximum reduced to 85°C.

Tier 3: Cross-Functional Alternatives

Parts listed in the substitute field of the main part specification (MCP664-E/ST, MCP6424T-E/ST, MCP6404-E/ST, MCP609T-I/ST) are identified as functional alternatives but require detailed application analysis for compatibility determination.

Frequently Asked Questions (FAQ)

Q1: Can LMV344IPWR be used as a direct replacement for LMV344IPWG4?

A: Yes. LMV344IPWR is a direct electrical equivalent with identical specifications across all critical parameters: CMOS amplifier type, four circuits, rail-to-rail output, 1 V/µs slew rate, 1 MHz gain bandwidth product, 1 pA input bias current, 250 µV input offset voltage, and -40°C to 125°C operating range. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Last Time Buy). No design modifications are required.

Q2: What is the difference between LMV344IPWR and LMV344MT/NOPB?

A: Both are Texas Instruments LMV344 series parts with Active product status. LMV344IPWR maintains the original 2.5V minimum supply voltage and 250 µV input offset voltage. LMV344MT/NOPB increases minimum supply voltage to 2.7V and input offset voltage to 700 µV. The choice depends on application requirements for low-voltage operation and precision offset specifications. LMV344IPWR is preferred for designs requiring 2.5V minimum supply operation.

Q3: Can Rohm Semiconductor parts (LMR344FVJ-E2, BU7487FV-E2, BU7487SFV-E2) replace the LMV344IPWG4?

A: Rohm parts maintain the four-circuit rail-to-rail amplifier architecture in 14-TSSOP package but introduce performance variations. LMR344FVJ-E2 is the closest match with identical slew rate and input offset voltage but increased supply current (400 µA) and reduced operating temperature maximum (85°C). BU7487 variants offer enhanced performance (10 V/µs slew rate, 10 MHz bandwidth) but significantly increased supply current (6 mA) and reduced output current capability (12 mA). These substitutes are suitable only when application requirements align with their specific performance characteristics.

Q4: What are the key compatibility criteria for substituting the LMV344IPWG4?

A: Substitutes must satisfy the following mandatory criteria: (1) Four independent amplifier circuits, (2) Rail-to-rail output capability, (3) 14-TSSOP surface mount package, (4) Supply voltage range encompassing 2.5V to 5.5V, (5) Operating temperature range of at least -40°C to 125°C, (6) ROHS3 compliance and MSL Level 1 rating. Secondary criteria include slew rate (1 V/µs minimum), gain bandwidth product (1 MHz minimum), input bias current (1 pA maximum), and input offset voltage (250 µV maximum).

Q5: Why is LMV344IPWR recommended over other Texas Instruments alternatives?

A: LMV344IPWR is recommended because it maintains Active product status (ensuring long-term availability), provides the highest inventory level (29,278 pcs), and is supplied in industry-standard Cut Tape & Digi-Reel format suitable for automated assembly and high-volume production. It is electrically identical to the LMV344IPWG4 and represents the optimal path for design continuity and supply chain stability.

Q6: Can MAX4403AUD+ be used as a substitute?

A: MAX4403AUD+ is a functional alternative suitable for applications where the following variations are acceptable: (1) General Purpose amplifier type instead of CMOS, (2) Reduced gain bandwidth product (800 kHz versus 1 MHz), (3) Reduced output current per channel (30 mA versus 113 mA), (4) Increased supply current (410 µA versus 107 µA). The part maintains matching supply voltage range (2.5V to 5.5V) and operating temperature range (-40°C to 125°C). Substitution requires verification that application performance requirements are satisfied by these parameter variations.

Q7: What is the significance of packaging format differences (Tube, Cut Tape & Digi-Reel, Tape & Reel)?

A: Packaging format affects supply chain logistics and assembly processes but does not impact electrical functionality. Tube packaging is suitable for manual assembly and small-volume applications. Cut Tape & Digi-Reel format is optimized for automated pick-and-place assembly and medium-to-high-volume production. Tape & Reel format is standard for high-volume manufacturing. Selection depends on production volume, assembly equipment capability, and inventory management requirements.

Q8: Are there supply voltage compatibility issues between LMV344IPWG4 and LMV344MT/NOPB?

A: Yes. LMV344IPWG4 operates at minimum 2.5V supply voltage, while LMV344MT/NOPB requires minimum 2.7V. Designs operating at 2.5V to 2.6V supply voltage cannot use LMV344MT/NOPB as a substitute. For applications requiring 2.5V minimum operation, LMV344IPWR or LMV344IPW must be selected.

Q9: What performance trade-offs exist when using BU7487SFV-E2 as a substitute?

A: BU7487SFV-E2 offers enhanced slew rate (10 V/µs versus 1 V/µs) and gain bandwidth product (10 MHz versus 1 MHz), making it suitable for higher-frequency applications. However, it introduces the following trade-offs: (1) Supply current increased from 107 µA to 6 mA (56x increase), (2) Output current per channel reduced from 113 mA to 12 mA, (3) Minimum supply voltage increased from 2.5V to 3V, (4) Operating temperature maximum reduced from 125°C to 105°C, (5) Package variant is 14-LSSOP instead of 14-TSSOP. Substitution is appropriate only for applications requiring enhanced bandwidth and capable of accommodating increased power consumption.

Q10: How does input offset voltage variation affect circuit design?

A: Input offset voltage determines the DC error at the amplifier output when no signal is applied. LMV344IPWG4 specifies 250 µV maximum offset. LMV344MT/NOPB specifies 700 µV maximum offset. For precision DC amplification, transimpedance amplifiers, and instrumentation applications, the 450 µV difference may require circuit design adjustments such as increased feedback network precision or offset nulling techniques. For AC-coupled applications and high-gain circuits, this variation may be negligible.

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