MAX419CSD+ Equivalent & Substitute Parts

Part Overview

The MAX419CSD+ is a general purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production requirements.

The MAX419CSD+ operates across a supply voltage range of 2.5V to 10V with a slew rate of 0.08V/µs and gain bandwidth product of 150 kHz. Its low input bias current of 0.1 pA and input offset voltage of 1 mV make it suitable for precision analog signal conditioning applications. Due to its obsolete status, active substitute parts with compatible or enhanced electrical characteristics are required for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	0.08	V/µs
Gain Bandwidth Product	150	kHz
Current - Input Bias	0.1	pA
Voltage - Input Offset	1	mV
Current - Supply (x4 Channels)	1	µA
Current - Output / Channel	600	µA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	10	V
Operating Temperature	0 to 70	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MAX419CSD+ is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 14-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility.

Circuit Configuration: The device must provide 4 independent amplifier circuits in a single package to maintain functional equivalence.

Output Architecture: Rail-to-rail output capability is required to preserve signal swing characteristics across the specified supply voltage range.

Supply Voltage Range: Substitute parts must operate within or exceed the 2.5V to 10V supply span of the original device. Parts with extended supply ranges (such as 2.5V to 15.5V) provide additional design flexibility.

Electrical Performance: While the MAX419CSD+ operates at lower bandwidth (150 kHz) and slew rate (0.08V/µs), substitute parts with enhanced performance characteristics (higher bandwidth and slew rate) remain functionally compatible for applications not requiring frequency-dependent matching.

Product Status: Active substitute parts are preferred over obsolete alternatives to ensure long-term availability and production support.

Substitute parts are grouped into two categories based on amplifier type: CMOS amplifiers (LMC6044AIM, LMC6494AEMX/NOPB, LMC6494BEMX/NOPB) and general purpose amplifiers (OP462GSZ, OP462GSZ-REEL, OP462GSZ-REEL7, TS464CDT, TS974IDT).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (mV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
MAX419CSD+	Analog Devices Inc./Maxim	General Purpose	0.08	150	0.1	1	2.5	10	0 to 70	Obsolete
LMC6044AIM	Texas Instruments	CMOS	0.02	100	0.002	1	4.5	15.5	-40 to 85	Obsolete
LMC6494AEMX/NOPB	National Semiconductor	CMOS	1.3	1500	0.15	0.11	2.5	15.5	-40 to 125	Active
LMC6494BEMX/NOPB	Texas Instruments	CMOS	1.3	1500	0.15	0.11	2.5	15.5	-40 to 125	Active
OP462GSZ	Analog Devices Inc.	General Purpose	13	15000	260	0.025	2.7	12	-40 to 125	Active
OP462GSZ-REEL	Analog Devices Inc.	General Purpose	13	15000	260	0.025	2.7	12	-40 to 125	Active
OP462GSZ-REEL7	Analog Devices Inc.	General Purpose	13	15000	260	0.025	2.7	12	-40 to 125	Active
TS464CDT	STMicroelectronics	General Purpose	4	12000	200	1	2.7	10	-20 to 70	Active
TS974IDT	STMicroelectronics	General Purpose	4	12000	200	1	2.7	10	-40 to 125	Active

Engineering Selection Recommendations

Primary Recommendation: OP462GSZ Series

The OP462GSZ, OP462GSZ-REEL, and OP462GSZ-REEL7 are the preferred substitutes for the MAX419CSD+. All three variants are manufactured by Analog Devices Inc. and share identical electrical specifications. These parts maintain general purpose amplifier classification and rail-to-rail output architecture. The OP462 series demonstrates active product status with extended operating temperature range (-40°C to 125°C) compared to the original device. Supply voltage compatibility spans 2.7V to 12V, which encompasses the MAX419CSD+ operating range. The OP462 series exhibits significantly enhanced performance characteristics with 13V/µs slew rate and 15 MHz gain bandwidth product, providing superior frequency response for modern signal conditioning applications. All variants are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Secondary Recommendation: TS974IDT

The TS974IDT from STMicroelectronics provides an alternative general purpose amplifier substitute with automotive-grade qualification (AEC-Q100). This device operates across -40°C to 125°C and maintains the same 14-SOIC package footprint. The TS974IDT offers 4V/µs slew rate and 12 MHz gain bandwidth product, positioning it between the original MAX419CSD+ and the higher-performance OP462 series. Supply voltage range of 2.7V to 10V directly matches the MAX419CSD+ maximum specification. The TS974IDT provides 100 mA output current per channel, exceeding the original device's 600 µA specification.

Alternative Recommendation: LMC6494BEMX/NOPB

The LMC6494BEMX/NOPB from Texas Instruments represents an active CMOS amplifier option with enhanced precision characteristics. This device features 1.3V/µs slew rate and 1.5 MHz gain bandwidth product with superior input offset voltage of 110 µV. The extended supply range of 2.5V to 15.5V and operating temperature of -40°C to 125°C provide design flexibility. The LMC6494BEMX/NOPB is supplied in Tape & Reel packaging and maintains ROHS3 compliance. This substitute is suitable for applications requiring lower input offset voltage and extended temperature operation.

Packaging Variants: The OP462GSZ-REEL and OP462GSZ-REEL7 represent tape and reel packaging options of the same electrical device, suitable for automated assembly processes. Selection between tube (OP462GSZ) and tape & reel variants depends on production methodology rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the OP462GSZ directly replace the MAX419CSD+ without circuit modification?

A: Yes. Both devices use the 14-SOIC package with identical pinout, provide 4 rail-to-rail amplifier circuits, and operate within overlapping supply voltage ranges (2.7V to 12V for OP462GSZ encompasses the 2.5V to 10V range of MAX419CSD+). The OP462GSZ exhibits superior electrical performance with higher slew rate and bandwidth, which does not compromise backward compatibility in applications designed for the original device.

Q: What is the difference between OP462GSZ, OP462GSZ-REEL, and OP462GSZ-REEL7?

A: These three part numbers represent identical electrical devices with different packaging and distribution formats. OP462GSZ is supplied in tube packaging. OP462GSZ-REEL and OP462GSZ-REEL7 are supplied in tape and reel format for automated pick-and-place assembly. Selection depends on production equipment and volume requirements, not electrical performance.

Q: Why does the LMC6044AIM show obsolete status despite being listed as a substitute?

A: The LMC6044AIM is included in the substitute list due to its presence in the original MAX419CSD+ cross-reference data. However, its obsolete status makes it unsuitable for new designs. The LMC6494BEMX/NOPB and LMC6494AEMX/NOPB represent active CMOS alternatives with superior performance characteristics.

Q: Is the TS974IDT suitable for automotive applications?

A: Yes. The TS974IDT carries AEC-Q100 automotive qualification and is rated for -40°C to 125°C operating temperature. This device is appropriate for automotive-grade signal conditioning applications requiring general purpose amplifier functionality.

Q: What are the key electrical differences between the MAX419CSD+ and OP462GSZ?

A: The OP462GSZ provides 162.5× higher slew rate (13V/µs versus 0.08V/µs), 100× higher gain bandwidth product (15 MHz versus 150 kHz), and 2600× higher input bias current (260 nA versus 0.1 pA). These differences indicate the OP462GSZ is optimized for higher-frequency applications. The MAX419CSD+ exhibits lower power consumption (1 µA supply current versus 550 µA) and lower input bias current, making it suitable for ultra-low-power or precision DC applications. Both devices maintain 1 mV input offset voltage specification.

Q: Can CMOS amplifiers (LMC6494 series) replace bipolar general purpose amplifiers (OP462 series)?

A: CMOS and general purpose amplifier architectures have different input stage characteristics. The LMC6494 series exhibits extremely low input bias current (0.15 pA) and superior input offset voltage (110 µV), making them suitable for precision instrumentation. The OP462 series provides higher output current capability (30 mA versus 30 mA) and faster slew rate (13V/µs versus 1.3V/µs). Selection between these families depends on specific application requirements for input impedance, precision, and output drive capability.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package with 0.154" width and 3.90mm body width is a standardized surface mount package. All substitute parts use this identical package, ensuring direct PCB footprint compatibility without layout redesign. This package specification is critical for drop-in replacement capability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (OP462GSZ series, TS974IDT, LMC6494 series, and TS464CDT) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). This ensures compatibility with modern manufacturing processes and environmental regulations.

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