LT1179ACJ Equivalent & Substitute Parts

Part Overview

The LT1179ACJ is a general purpose operational amplifier integrated circuit manufactured by Analog Devices Inc., configured as a quad amplifier with four independent circuits in a 14-CERDIP package. This device is classified as obsolete, indicating it is no longer in active production. The LT1179ACJ operates across a supply voltage range of 5V to 30V and is designed for through-hole mounting applications. Due to its obsolete status, identifying equivalent substitute parts with compatible electrical and mechanical specifications is necessary for design continuity and component procurement.

Key Parameters

Parameter	LT1179ACJ Value
Amplifier Type	General Purpose
Number of Circuits	4
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)
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	14-CDIP (0.300", 7.62mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LT1179ACJ are identified based on the following critical parameters that determine functional and mechanical compatibility:

Core Compatibility Criteria:

Amplifier Type: General Purpose
Number of Circuits: 4 (quad configuration)
Package / Case: 14-CDIP (0.300", 7.62mm)
Mounting Type: Through Hole

The substitute parts LT1014AMJ, LT1014AMJB, LT1014MJ, and LT1014MJB all satisfy these core requirements. These devices are manufactured by Texas Instruments and maintain the same quad amplifier architecture in an identical 14-CDIP package footprint, ensuring mechanical and pin-level compatibility.

Electrical Parameter Considerations:

The substitute parts exhibit enhanced electrical performance characteristics compared to the LT1179ACJ. The LT1014 series devices feature a higher slew rate (0.4 V/µs versus 0.04 V/µs), increased gain bandwidth product (700 kHz versus 85 kHz), and improved input offset voltage (60 µV versus 80 µV). These enhancements represent superior performance specifications that are backward compatible with applications designed for the LT1179ACJ.

The substitute parts support an expanded supply voltage range (4V to 44V versus 5V to 30V) and an extended operating temperature range (-55°C to 125°C versus 0°C to 70°C), providing greater operational flexibility. All substitute parts are classified as active products with current manufacturing status.

Parameter Comparison

Parameter	LT1179ACJ	LT1014AMJ	LT1014AMJB	LT1014MJ	LT1014MJB
Manufacturer	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4
Output Type	Not Specified	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Slew Rate	0.04 V/µs	0.4 V/µs	0.4 V/µs	0.4 V/µs	0.4 V/µs
Gain Bandwidth Product	85 kHz	700 kHz	700 kHz	700 kHz	700 kHz
Current - Input Bias	3 nA	12 nA	12 nA	12 nA	12 nA
Voltage - Input Offset	80 µV	60 µV	60 µV	60 µV	60 µV
Current - Supply	16 µA (x4 Channels)	350 µA (x4 Channels)	350 µA (x4 Channels)	350 µA (x4 Channels)	350 µA (x4 Channels)
Voltage - Supply Span (Min)	5 V	4 V	4 V	4 V	4 V
Voltage - Supply Span (Max)	30 V	44 V	44 V	44 V	44 V
Operating Temperature	0°C ~ 70°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	14-CDIP (0.300", 7.62mm)	14-CDIP (0.300", 7.62mm)	14-CDIP (0.300", 7.62mm)	14-CDIP (0.300", 7.62mm)	14-CDIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The LT1014 series devices (LT1014AMJ, LT1014AMJB, LT1014MJ, LT1014MJB) are suitable substitutes for the obsolete LT1179ACJ based on the following engineering criteria:

Product Status and Availability: All four substitute parts are classified as active products with current manufacturing status, ensuring long-term availability and supply chain continuity. The LT1179ACJ is obsolete, making these active alternatives necessary for ongoing production and design support.

Compliance and Certification: All substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components. The LT1179ACJ compliance status is not specified, whereas the substitute parts provide documented compliance certification.

Mechanical Compatibility: All substitute parts utilize the identical 14-CDIP package footprint (0.300", 7.62mm) with through-hole mounting, ensuring direct pin-compatible replacement without PCB redesign.

Electrical Performance: The substitute parts provide enhanced electrical specifications including improved slew rate, higher gain bandwidth product, and better input offset voltage characteristics. These enhancements are backward compatible with applications designed for the LT1179ACJ. The expanded supply voltage range (4V to 44V) and extended operating temperature range (-55°C to 125°C) provide greater operational flexibility compared to the original device specifications.

Frequently Asked Questions (FAQ)

Q: Can the LT1014 series devices directly replace the LT1179ACJ without PCB modifications?

A: Yes. The LT1014AMJ, LT1014AMJB, LT1014MJ, and LT1014MJB devices are pin-compatible replacements housed in the identical 14-CDIP package with the same 0.300" (7.62mm) pitch. Direct substitution is possible without PCB redesign.

Q: What are the differences between LT1014AMJ, LT1014AMJB, LT1014MJ, and LT1014MJB?

A: All four devices share identical electrical specifications and package configurations. The designations reflect different temperature grade and screening classifications from Texas Instruments. Selection between these variants depends on specific procurement requirements and temperature grade specifications for your application.

Q: Are there electrical performance differences between the LT1179ACJ and LT1014 series substitutes?

A: Yes. The LT1014 series devices feature higher slew rate (0.4 V/µs versus 0.04 V/µs), increased gain bandwidth product (700 kHz versus 85 kHz), and improved input offset voltage (60 µV versus 80 µV). These represent enhanced performance characteristics. The LT1014 series also supports expanded supply voltage range (4V to 44V versus 5V to 30V) and extended operating temperature range (-55°C to 125°C versus 0°C to 70°C).

Q: What is the supply current difference between the LT1179ACJ and LT1014 series?

A: The LT1179ACJ operates at 16 µA total supply current across four channels, while the LT1014 series devices operate at 350 µA total supply current across four channels. This represents a higher power consumption in the substitute parts. Applications with strict power budget constraints require evaluation of this parameter.

Q: Are the LT1014 series devices compliant with current environmental regulations?

A: Yes. All LT1014 series substitute parts (LT1014AMJ, LT1014AMJB, LT1014MJ, LT1014MJB) are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components used in commercial and industrial applications.

Q: What is the input bias current difference between the LT1179ACJ and LT1014 series?

A: The LT1179ACJ has an input bias current of 3 nA, while the LT1014 series devices have an input bias current of 12 nA. This represents a four-fold increase in input bias current in the substitute parts. Applications requiring extremely low input bias current characteristics require evaluation of this specification.

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