MAX4334ESD Equivalent & Substitute Parts

Part Overview

The MAX4334ESD is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package. Manufactured by Analog Devices Inc./Maxim Integrated, this rail-to-rail amplifier is designed for low-power applications requiring compact integration. The device operates across a supply voltage range of 2.3 V to 6.5 V with an operating temperature range of -40°C to 85°C.

The MAX4334ESD is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Key Parameters

Parameter	MAX4334ESD
Manufacturer	Analog Devices Inc./Maxim Integrated
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
Slew Rate	1.5 V/µs
Gain Bandwidth Product	3 MHz
Current - Input Bias	25 nA
Voltage - Input Offset	250 µV
Current - Supply	275 µA (x4 Channels)
Current - Output / Channel	20 mA
Voltage - Supply Span (Min)	2.3 V
Voltage - Supply Span (Max)	6.5 V
Operating Temperature	-40°C ~ 85°C
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX4334ESD is determined by the following critical parameters:

Functional Equivalence Criteria:

Four independent operational amplifier circuits
Rail-to-rail output configuration
14-SOIC surface-mount package with 0.154" (3.90mm) width
General-purpose amplifier classification

Performance Compatibility Criteria:

Slew rate: minimum 0.5 V/µs (MAX4334ESD: 1.5 V/µs)
Gain bandwidth product: minimum 1 MHz (MAX4334ESD: 3 MHz)
Input bias current: maximum 70 nA (MAX4334ESD: 25 nA)
Input offset voltage: maximum 1.7 mV (MAX4334ESD: 250 µV)
Output current per channel: minimum 16 mA (MAX4334ESD: 20 mA)
Supply voltage range: must encompass or exceed 2.3 V to 6.5 V span

Compliance and Status Criteria:

RoHS3 compliance preferred for new designs
Active or Last Time Buy product status for continued availability
Moisture sensitivity level MSL 1 (unlimited shelf life)

Substitute parts are grouped into two categories: Texas Instruments LMV324 series (lower performance, higher compliance) and Analog Devices OP491 series (higher performance, extended supply range). The STMicroelectronics TS1874AIYDT represents an automotive-qualified alternative with AEC-Q100 certification.

Parameter Comparison

Parameter	MAX4334ESD	LMV324ID	LMV324M/NOPB	LMV324QD	LMV324QDR	OP491GSZ	OP491GSZ-REEL	OP491GSZ-REEL7	TS1874AIYDT
Manufacturer	Analog Devices Inc./Maxim	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	STMicroelectronics
Number of Circuits	4	4	4	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	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Slew Rate (V/µs)	1.5	1	1	1	1	0.5	0.5	0.5	0.6
Gain Bandwidth Product (MHz)	3	1	1	1	1	3	3	3	1.8
Current - Input Bias (nA)	25	15	15	15	15	30	30	30	70
Voltage - Input Offset (µV/mV)	250 µV	1.7 mV	1.7 mV	1.7 mV	1.7 mV	80 µV	80 µV	80 µV	1 mV
Current - Supply (µA x4)	275	410	410	410	410	260	260	260	500
Current - Output / Channel (mA)	20	40	160	40	40	16	16	16	80
Voltage - Supply Span Min (V)	2.3	2.7	2.7	2.7	2.7	2.7	2.7	2.7	1.8
Voltage - Supply Span Max (V)	6.5	5.5	5.5	5.5	5.5	12	12	12	6
Operating Temperature (°C)	-40 ~ 85	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy	Active	Last Time Buy	Active	Active	Active	Active	Active
Packaging Option	Not specified	Tube	Tube	Tube	Cut Tape & Digi-Reel	Tube	Tape & Reel	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For RoHS3-Compliant Applications (Recommended):

The LMV324M/NOPB is the primary substitute for new designs. This Texas Instruments part maintains active product status, ensuring long-term availability. It provides RoHS3 compliance, extended operating temperature range (-40°C to 125°C), and superior output current capability (160 mA per channel versus 20 mA in the MAX4334ESD). The LMV324M/NOPB operates within a 2.7 V to 5.5 V supply range, which encompasses the lower portion of the MAX4334ESD specification but does not extend to the 6.5 V maximum. Applications requiring the full 6.5 V upper limit must evaluate alternative solutions.

For Extended Supply Voltage Range:

The OP491GSZ and OP491GSZ-REEL7 (Analog Devices Inc.) support supply voltages from 2.7 V to 12 V, exceeding the MAX4334ESD maximum of 6.5 V. Both variants maintain active product status and RoHS3 compliance. The OP491 series delivers superior input offset voltage performance (80 µV versus 250 µV) and matches the 3 MHz gain bandwidth product of the MAX4334ESD. Output current per channel is 16 mA, slightly below the MAX4334ESD specification of 20 mA. The OP491GSZ-REEL7 variant offers Cut Tape & Digi-Reel packaging with 8,657 units in stock, providing superior availability.

For Automotive Applications:

The TS1874AIYDT (STMicroelectronics) is an AEC-Q100 qualified alternative suitable for automotive-grade designs. This part provides the lowest minimum supply voltage (1.8 V) and highest output current per channel (80 mA). It maintains active product status and RoHS3 compliance. The operating temperature range extends to 125°C. Supply voltage maximum is 6 V, which accommodates the MAX4334ESD specification range.

For Last Time Buy Scenarios:

The LMV324ID and LMV324QD are designated Last Time Buy by Texas Instruments. These parts are functionally equivalent to LMV324M/NOPB but with reduced output current capability (40 mA per channel). Selection of Last Time Buy parts should be limited to applications where existing inventory must be consumed or where supply chain continuity is not a primary concern.

Frequently Asked Questions (FAQ)

Q1: Can the LMV324 series directly replace the MAX4334ESD in all applications?

The LMV324 series is functionally compatible with the MAX4334ESD in terms of package, pin configuration, and four-circuit architecture. However, the LMV324 maximum supply voltage is 5.5 V, while the MAX4334ESD supports up to 6.5 V. Applications operating at supply voltages between 5.5 V and 6.5 V require alternative solutions such as the OP491 series. Additionally, the LMV324 exhibits higher input offset voltage (1.7 mV versus 250 µV), which may affect precision analog circuits.

Q2: What is the difference between OP491GSZ, OP491GSZ-REEL, and OP491GSZ-REEL7?

All three variants are functionally identical Analog Devices OP491 operational amplifiers with identical electrical specifications. The differences are packaging and distribution format: OP491GSZ is supplied in tube packaging; OP491GSZ-REEL is supplied in tape and reel format; OP491GSZ-REEL7 is supplied in cut tape and Digi-Reel format. Selection depends on manufacturing process requirements and inventory management preferences. OP491GSZ-REEL7 offers the highest current inventory (8,657 units).

Q3: Why does the LMV324M/NOPB have higher output current (160 mA) than other LMV324 variants?

The LMV324M/NOPB is a higher-performance variant within the LMV324 family, specifically designed for applications requiring increased output drive capability. The standard LMV324ID and LMV324QD variants provide 40 mA per channel output current. Selection of the LMV324M/NOPB is appropriate for applications requiring higher load current capability while maintaining the same package and supply voltage specifications.

Q4: Is the TS1874AIYDT suitable for non-automotive applications?

Yes. The TS1874AIYDT is AEC-Q100 qualified, meaning it meets automotive industry reliability standards. This qualification does not restrict its use in non-automotive applications. The part is fully compatible with general-purpose amplifier applications and offers superior performance characteristics including lower minimum supply voltage (1.8 V) and higher output current (80 mA per channel). Non-automotive applications may benefit from these enhanced specifications.

Q5: What is the impact of the lower slew rate in LMV324 and OP491 series compared to MAX4334ESD?

The MAX4334ESD has a slew rate of 1.5 V/µs. The LMV324 series provides 1 V/µs, and the OP491 series provides 0.5 V/µs. Slew rate determines the maximum rate of voltage change at the output. Applications with fast transient requirements or high-frequency signal processing may be affected. For most general-purpose amplifier applications operating below 100 kHz, the reduced slew rate of substitute parts is not a limiting factor. High-frequency applications should verify slew rate compatibility through circuit simulation or prototype testing.

Q6: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (LMV324 series, OP491 series, and TS1874AIYDT) are RoHS3 compliant. The original MAX4334ESD is RoHS non-compliant. Substitution to any of these parts automatically upgrades the design to RoHS3 compliance, which is required for most commercial and industrial applications sold in regulated markets.

Q7: What is the significance of "Last Time Buy" product status?

Last Time Buy designation indicates that the manufacturer will no longer accept new orders after a specified cutoff date. Existing inventory may be available for a limited period. Parts designated Last Time Buy (LMV324ID, LMV324QD) should not be selected for new designs. These parts are appropriate only for sustaining production of existing products where supply chain continuity is already established. For new designs, select parts with Active product status: LMV324M/NOPB, OP491GSZ, OP491GSZ-REEL, OP491GSZ-REEL7, or TS1874AIYDT.

Q8: Can the MAX4334ESD be used interchangeably with these substitutes in existing designs?

The MAX4334ESD is obsolete and no longer manufactured. Existing inventory is limited (853 units reported in stock). For designs currently using the MAX4334ESD, substitution is necessary when existing inventory is depleted. The substitute parts are pin-compatible and functionally equivalent for most applications. However, circuit validation is required to confirm compatibility with specific performance requirements, particularly regarding supply voltage range, slew rate, and output current specifications.

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