LT2179ACS#TRPBF Equivalent & Substitute Parts

Part Overview

The LT2179ACS#TRPBF 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 are identified when equivalent functional performance can be achieved within the constraints of the 14-SOIC package format and general purpose amplifier classification, while accounting for differences in electrical characteristics such as slew rate, gain bandwidth product, and supply voltage 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 - Input Bias	3	nA
Voltage - Input Offset	80	µV
Current - Supply	16	µA (x4 Channels)
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the LT2179ACS#TRPBF is determined by the following criteria:

Primary Compatibility Requirements:

Four independent operational amplifier circuits
14-SOIC surface mount package format (0.154", 3.90mm width)
General purpose amplifier classification
Active product status
RoHS3 compliance
MSL rating of 1 (Unlimited)

Electrical Parameter Considerations: Substitute parts must operate within the specified supply voltage range or provide overlap with the main part's 2.2V to 36V span. Slew rate, gain bandwidth product, input bias current, and input offset voltage are secondary parameters that may differ between the main part and substitutes, as these characteristics are application-dependent and do not prevent functional substitution in general purpose amplifier circuits.

Identified Substitute Parts:

MC33074DR2G (onsemi)
MC33174DT (STMicroelectronics)
MC33174VDR2G (onsemi)
MC34074VDR2G (onsemi)
NCV33074DR2G (onsemi)

Parameter Comparison

Parameter	LT2179ACS#TRPBF	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
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
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)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status and RoHS3 compliance, ensuring regulatory alignment with the LT2179ACS#TRPBF. The 14-SOIC package format is consistent across all alternatives, permitting direct board-level substitution without layout modifications.

Supply Voltage Considerations: The LT2179ACS#TRPBF operates from 2.2V minimum, which is lower than all substitute options (3V to 4V minimum). Applications requiring operation below 3V are not compatible with the identified substitutes. Conversely, all substitutes support the maximum 36V to 44V range, providing adequate headroom for higher voltage applications.

Temperature Range Considerations: The LT2179ACS#TRPBF is specified for 0°C to 70°C operation. Substitute parts offer extended temperature ranges (-40°C to 85°C, -40°C to 105°C, or -40°C to 125°C), providing broader environmental capability. Applications limited to the 0°C to 70°C window are fully compatible with all substitutes.

Electrical Performance Differences: Substitute parts exhibit higher slew rates (2V/µs to 13V/µs) and gain bandwidth products (1.8MHz to 4.5MHz) compared to the LT2179ACS#TRPBF (0.04V/µs, 85kHz). These enhanced characteristics do not prevent substitution in general purpose applications but may alter circuit behavior in bandwidth-sensitive or high-frequency designs. Input bias current and input offset voltage specifications vary across substitutes; applications with stringent precision requirements should verify compatibility with specific substitute electrical parameters.

Automotive Grade Consideration: The NCV33074DR2G is qualified to AEC-Q100 automotive standards, distinguishing it for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can the LT2179ACS#TRPBF be directly replaced with MC33074DR2G on a printed circuit board?

A: Yes, direct substitution is possible from a package and pinout perspective, as both devices use the 14-SOIC surface mount package. However, the MC33074DR2G requires a minimum supply voltage of 3V compared to the LT2179ACS#TRPBF's 2.2V minimum. Verify that your circuit supplies at least 3V before substitution.

Q: What is the primary difference between the LT2179ACS#TRPBF and the MC33174VDR2G?

A: The LT2179ACS#TRPBF is optimized for low power consumption (16µA total supply current) and operates from 2.2V, while the MC33174VDR2G consumes 180µA and requires a 3V minimum supply. The MC33174VDR2G offers an extended operating temperature range (-40°C to 125°C) and lower input bias current (20nA versus 3nA). Selection depends on whether power consumption or temperature range is the primary design constraint.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all identified substitute parts are RoHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the LT2179ACS#TRPBF.

Q: Which substitute part is suitable for automotive applications?

A: The NCV33074DR2G is qualified to AEC-Q100 automotive standards and is the appropriate selection for automotive-grade applications requiring formal qualification documentation.

Q: Does the higher slew rate of substitute parts affect circuit compatibility?

A: The substitute parts MC33074DR2G, MC34074VDR2G, and NCV33074DR2G feature 13V/µs slew rates, significantly higher than the LT2179ACS#TRPBF's 0.04V/µs. In general purpose amplifier applications, this difference does not prevent substitution. However, in circuits where slew rate is a critical design parameter (such as precision integrators or high-frequency signal conditioning), the higher slew rate may alter circuit behavior. Verify circuit performance through simulation or testing if slew rate is application-critical.

Q: What is the minimum supply voltage requirement for each substitute part?

A: MC33074DR2G, MC33174VDR2G, MC34074VDR2G, and NCV33074DR2G all require a 3V minimum supply. The MC33174DT requires 4V minimum. The LT2179ACS#TRPBF operates from 2.2V minimum. Applications operating below 3V are not compatible with any identified substitutes.

Q: Can I use MC33174DT in place of LT2179ACS#TRPBF if my circuit operates at 4V or higher?

A: Yes, the MC33174DT is compatible for circuits operating at 4V or higher. The device provides a 14-SOIC package format, four independent circuits, and active product status. Verify that the 2V/µs slew rate and 2.1MHz gain bandwidth product are acceptable for your application's frequency response requirements.

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