LT2179ACS#PBF Equivalent & Substitute Parts

Part Overview

The LT2179ACS#PBF is a general purpose operational amplifier manufactured by Analog Devices Inc., featuring four independent circuits in a 14-SOIC surface mount package. This rail-to-rail output amplifier operates across a wide supply voltage range of 2.2V to 36V and is designed for applications requiring low power consumption and compact integration. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within broader electrical parameter tolerances. The following equivalent devices maintain the four-circuit configuration and 14-SOIC package footprint while offering alternative electrical characteristics suitable for specific application requirements.

Key Parameters

Parameter	Value	Unit
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	—
Voltage - Supply Span (Min)	2.2	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 to 70	°C
Slew Rate	0.04	V/µs
Gain Bandwidth Product	85	kHz
Current - Supply	16	µA (x4 Channels)
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution compatibility for the LT2179ACS#PBF 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 without layout modifications.

Circuit Configuration: All candidates maintain four independent operational amplifier circuits, preserving the functional density and pinout architecture of the original device.

Supply Voltage Range: The original device operates from 2.2V to 36V. Substitute parts with minimum supply voltage requirements of 3V or higher and maximum ratings of 44V or greater remain compatible with most applications, though designs operating below 3V require verification against specific supply requirements.

Mounting Technology: Surface mount technology is maintained across all substitute options, ensuring compatibility with modern assembly processes.

Compliance Standards: All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), meeting current regulatory and manufacturing requirements.

The substitute parts are grouped into two functional categories based on output type and electrical performance characteristics: single-ended output devices with enhanced slew rate and bandwidth, and rail-to-rail or unspecified output devices with lower power consumption profiles.

Parameter Comparison

Parameter	LT2179ACS#PBF	MC33074DR2G	MC33174DT	MC33174VDR2G	MC34074VDR2G	NCV33074DR2G
Manufacturer	Analog Devices Inc.	onsemi	STMicroelectronics	onsemi	onsemi	onsemi
Number of Circuits	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.2 V	3 V	4 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	36 V	44 V	44 V	44 V	44 V	44 V
Slew Rate	0.04 V/µs	13 V/µs	2 V/µs	2.1 V/µs	13 V/µs	13 V/µs
Gain Bandwidth Product	85 kHz	4.5 MHz	2.1 MHz	1.8 MHz	4.5 MHz	4.5 MHz
Current - Input Bias	3 nA	100 nA	100 nA	20 nA	100 nA	100 nA
Voltage - Input Offset	80 µV	1 mV	1 mV	2 mV	1 mV	1 mV
Current - Supply	16 µA (x4)	1.9 mA (x4)	220 µA	180 µA (x4)	1.9 mA (x4)	1.9 mA (x4)
Operating Temperature	0 to 70°C	-40 to 85°C	-40 to 105°C	-40 to 125°C	-40 to 125°C	-40 to 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

MC33074DR2G (onsemi): This substitute offers significantly enhanced slew rate (13V/µs) and gain bandwidth product (4.5 MHz) compared to the LT2179ACS#PBF. The device is suitable for applications requiring faster signal processing and higher frequency response. The minimum supply voltage of 3V eliminates compatibility with designs operating below this threshold. Current supply consumption increases to 1.9mA per channel. This part is active in production with ROHS3 compliance.

MC33174DT (STMicroelectronics): This option provides moderate performance characteristics with 2V/µs slew rate and 2.1 MHz bandwidth. The minimum supply voltage requirement of 4V restricts use in low-voltage applications. Operating temperature range extends to 105°C, providing enhanced thermal capability. Current supply is 220µA, representing a middle ground between ultra-low and high-consumption options. Active production status with ROHS3 compliance is confirmed.

MC33174VDR2G (onsemi): This substitute combines low input bias current (20 nA) with moderate slew rate (2.1V/µs) and 1.8 MHz bandwidth. The extended operating temperature range to 125°C supports high-temperature applications. Supply current of 180µA per channel offers improved efficiency compared to single-ended alternatives. Minimum supply voltage of 3V provides broader compatibility than the STMicroelectronics variant. Active production with ROHS3 compliance is maintained.

MC34074VDR2G (onsemi): This device matches the MC33074DR2G electrical performance with 13V/µs slew rate and 4.5 MHz bandwidth, offering extended operating temperature to 125°C. The higher current consumption (1.9mA per channel) and minimum supply voltage of 3V are consistent with high-performance single-ended output devices. Active production status and ROHS3 compliance are confirmed.

NCV33074DR2G (onsemi): This automotive-grade substitute (AEC-Q100 qualified) provides identical electrical characteristics to MC33074DR2G with 13V/µs slew rate and 4.5 MHz bandwidth. The automotive qualification and -40°C to 85°C operating range designate this part for automotive and harsh-environment applications. Current supply consumption is 1.9mA per channel. ROHS3 compliance and active production status are maintained.

Frequently Asked Questions (FAQ)

Q: Can the MC33074DR2G directly replace the LT2179ACS#PBF in all applications?

A: Direct replacement is possible from a package and pinout perspective, as both devices use the 14-SOIC package with four circuits. However, electrical performance differs significantly. The MC33074DR2G operates with a minimum supply voltage of 3V (versus 2.2V for the LT2179ACS#PBF) and exhibits substantially higher slew rate (13V/µs versus 0.04V/µs) and bandwidth (4.5 MHz versus 85 kHz). Applications operating below 3V supply voltage or requiring the specific low-frequency characteristics of the LT2179ACS#PBF require evaluation against the substitute's specifications.

Q: What is the primary difference between the MC33174VDR2G and MC34074VDR2G?

A: Both devices share identical electrical performance characteristics including 2.1V/µs slew rate and 1.8 MHz bandwidth for the MC33174VDR2G, and 13V/µs slew rate and 4.5 MHz bandwidth for the MC34074VDR2G. The MC34074VDR2G provides extended operating temperature range to 125°C compared to the MC33174VDR2G. Selection depends on thermal requirements and frequency response needs of the specific application.

Q: Is the NCV33074DR2G suitable for non-automotive applications?

A: The NCV33074DR2G is automotive-grade with AEC-Q100 qualification, indicating enhanced reliability and quality assurance standards. While the device functions in non-automotive applications, the automotive qualification represents additional manufacturing and testing rigor. Non-automotive applications may select this part without restriction, though the added qualification cost may not provide benefit for non-automotive use cases.

Q: How does the supply current consumption affect circuit design?

A: The LT2179ACS#PBF operates at 16µA total supply current (4µA per channel), making it suitable for battery-powered and ultra-low-power applications. Substitute parts exhibit significantly higher consumption: MC33074DR2G and MC34074VDR2G at 1.9mA per channel, MC33174DT at 220µA total, and MC33174VDR2G at 180µA per channel. Applications with strict power budgets must account for this increase in design calculations.

Q: What is the significance of the minimum supply voltage difference between 2.2V and 3V?

A: The LT2179ACS#PBF operates from 2.2V minimum, enabling use in applications with single lithium-ion cell supplies or dual alkaline battery configurations. All substitute parts require minimum 3V supply voltage, eliminating compatibility with 2.2V to 2.9V supply ranges. Designs operating in this voltage window must retain the LT2179ACS#PBF or select alternative devices with lower minimum voltage specifications.

Q: Are all substitute parts available in equivalent packaging options?

A: All substitute parts listed use the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB footprint compatibility. Packaging formats differ by supplier: MC33074DR2G and NCV33074DR2G are available in Cut Tape and Digi-Reel formats, MC33174DT in Cut Tape and Digi-Reel, MC33174VDR2G in Cut Tape, and MC34074VDR2G in Tape & Reel. Verify packaging availability with component suppliers for production requirements.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching the LT2179ACS#PBF compliance profile. REACH status is unaffected for all devices. ECCN classification is EAR99 and HTSUS code is 8542.33.0001 across all parts, indicating consistent regulatory treatment for export and tariff purposes.

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