LM6144AIM Equivalent & Substitute Parts

Part Overview

The LM6144AIM is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package. Manufactured by Texas Instruments, this rail-to-rail output amplifier is designed for applications requiring moderate bandwidth and low power consumption across a wide supply voltage range of 1.8 V to 24 V.

The LM6144AIM is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems currently utilizing this component.

Key Parameters

Parameter	Value
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Slew Rate	25 V/µs
Gain Bandwidth Product	18 MHz
Current - Input Bias	174 nA
Voltage - Input Offset	1.3 mV
Current - Supply	750 µA (x4 Channels)
Current - Output / Channel	22 mA
Voltage - Supply Span (Min)	1.8 V
Voltage - Supply Span (Max)	24 V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90 mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LM6144AIM are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Number of Circuits: 4 (quad configuration required)
Output Type: Rail-to-Rail
Package / Case: 14-SOIC surface-mount form factor
Mounting Type: Surface Mount

Performance Parameters (allowable variation):

Slew Rate: 25 V/µs (baseline)
Gain Bandwidth Product: 18 MHz (baseline)
Current - Input Bias: 174 nA (baseline)
Voltage - Input Offset: 1.3 mV (baseline)
Current - Supply: 750 µA per 4 channels (baseline)
Current - Output / Channel: 22 mA (baseline)
Voltage - Supply Span: 1.8 V to 24 V (baseline)

Substitute parts are classified into two categories:

Category 1: Direct Equivalents (Identical Electrical Specifications)

LM6144AIM/NOPB (National Semiconductor)
LM6144AIMX/NOPB (National Semiconductor)

These parts maintain all electrical parameters identical to the LM6144AIM and differ only in product status (Active vs. Obsolete) and packaging designation.

Category 2: Functional Substitutes (Different Electrical Specifications)

LMV324IDT (STMicroelectronics)
LMV324IYDT (STMicroelectronics)
TS1854IDT (STMicroelectronics)
TS924AIDT (STMicroelectronics)
TS924IDT (STMicroelectronics)

These parts maintain the quad configuration, rail-to-rail output, and 14-SOIC package but operate with different electrical performance characteristics. Substitution is valid only when application requirements permit operation within the specified parameters of the substitute part.

Parameter Comparison

Parameter	LM6144AIM	LM6144AIM/NOPB	LM6144AIMX/NOPB	LMV324IDT	LMV324IYDT	TS1854IDT	TS924AIDT	TS924IDT
Manufacturer	Texas Instruments	National Semiconductor	National Semiconductor	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	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
Slew Rate	25 V/µs	25 V/µs	25 V/µs	0.45 V/µs	0.45 V/µs	0.25 V/µs	1.3 V/µs	1.3 V/µs
Gain Bandwidth Product	18 MHz	18 MHz	18 MHz	1.3 MHz	1.3 MHz	630 kHz	4 MHz	4 MHz
Current - Input Bias	174 nA	174 nA	174 nA	16 nA	16 nA	16 nA	15 nA	15 nA
Voltage - Input Offset	1.3 mV	1.3 mV	1.3 mV	100 µV	100 µV	1 mV	900 µV	3 mV
Current - Supply	750 µA	750 µA	750 µA	162 µA	162 µA	162 µA	1 mA	1 mA
Current - Output / Channel	22 mA	22 mA	22 mA	160 mA	160 mA	48 mA	80 mA	80 mA
Voltage - Supply Span (Min)	1.8 V	1.8 V	1.8 V	2.7 V	2.7 V	1.8 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	24 V	24 V	24 V	6 V	6 V	6 V	12 V	12 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	Not specified	Not specified	Not specified	Not specified	AEC-Q100	Not specified	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required):

Select LM6144AIM/NOPB or LM6144AIMX/NOPB when obsolescence of the original LM6144AIM necessitates component substitution. Both parts maintain identical electrical specifications and 14-SOIC packaging. LM6144AIMX/NOPB is designated as the manufacturer-recommended equivalent and carries Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant.

For Functional Substitution (Design Review Required):

Functional substitutes from STMicroelectronics (LMV324IDT, LMV324IYDT, TS1854IDT, TS924AIDT, TS924IDT) are valid alternatives only when application circuit requirements accommodate the specified electrical parameter differences. All functional substitutes maintain quad configuration, rail-to-Rail output, and 14-SOIC packaging.

Selection Criteria by Application Requirements:

High-Speed Applications (Slew Rate Critical): LM6144AIM/NOPB or LM6144AIMX/NOPB maintain the 25 V/µs slew rate. TS924AIDT and TS924IDT provide 1.3 V/µs as intermediate alternatives. LMV324IDT and LMV324IYDT provide 0.45 V/µs; TS1854IDT provides 0.25 V/µs for low-speed applications.
Wide Supply Voltage Range (1.8 V to 24 V Required): LM6144AIM/NOPB and LM6144AIMX/NOPB maintain the full 1.8 V to 24 V range. TS1854IDT supports 1.8 V to 6 V. LMV324IDT and LMV324IYDT support 2.7 V to 6 V. TS924AIDT and TS924IDT support 2.7 V to 12 V.
Automotive Applications: LMV324IYDT, TS924AIDT, and TS924IDT carry AEC-Q100 qualification. LM6144AIM/NOPB and LM6144AIMX/NOPB do not specify automotive qualification.
Low Power Supply Current: LMV324IDT, LMV324IYDT, and TS1854IDT operate at 162 µA total supply current, compared to 750 µA for LM6144AIM/NOPB and LM6144AIMX/NOPB.
Extended Temperature Range: LMV324IDT, LMV324IYDT, TS1854IDT, TS924AIDT, and TS924IDT support -40°C to 125°C. LM6144AIM/NOPB and LM6144AIMX/NOPB support -40°C to 85°C.

All substitute parts are ROHS3 compliant and carry Active product status, ensuring regulatory compliance and supply availability.

Frequently Asked Questions (FAQ)

Q1: Can LM6144AIM/NOPB be used as a direct replacement for LM6144AIM?

A: Yes. LM6144AIM/NOPB is electrically and mechanically identical to LM6144AIM. Both parts feature identical slew rate (25 V/µs), gain bandwidth product (18 MHz), input bias current (174 nA), input offset voltage (1.3 mV), supply current (750 µA), output current per channel (22 mA), and supply voltage range (1.8 V to 24 V). The primary difference is product status: LM6144AIM is obsolete, while LM6144AIM/NOPB is active. No circuit modifications are required.

Q2: What is the difference between LM6144AIM/NOPB and LM6144AIMX/NOPB?

A: Both parts are electrically identical with all specifications matching the original LM6144AIM. LM6144AIMX/NOPB is designated as the manufacturer-recommended equivalent by National Semiconductor and is packaged in Bulk. LM6144AIM/NOPB is supplied in Cut Tape (CT) & Digi-Reel® packaging. Selection between these two depends on procurement and assembly requirements. Both are Active status and ROHS3 compliant.

Q3: Can STMicroelectronics parts (LMV324IDT, TS924AIDT, TS1854IDT) replace LM6144AIM in all applications?

A: No. STMicroelectronics substitutes are functionally compatible only when application circuit requirements accommodate their different electrical specifications. All three maintain quad configuration, rail-to-rail output, and 14-SOIC packaging. However, they differ significantly in slew rate, gain bandwidth product, supply current, output current capability, and supply voltage range. Circuit analysis is required to confirm compatibility.

Q4: Which substitute part has the lowest power consumption?

A: LMV324IDT and LMV324IYDT operate at 162 µA total supply current, compared to 750 µA for LM6144AIM/NOPB and LM6144AIMX/NOPB. TS1854IDT also operates at 162 µA. TS924AIDT and TS924IDT operate at 1 mA. For power-sensitive applications, LMV324 or TS1854 series are preferred.

Q5: What is the maximum supply voltage for each substitute part?

A: LM6144AIM/NOPB and LM6144AIMX/NOPB support 24 V maximum. TS1854IDT, LMV324IDT, and LMV324IYDT support 6 V maximum. TS924AIDT and TS924IDT support 12 V maximum. Applications requiring operation above 12 V must use LM6144AIM/NOPB or LM6144AIMX/NOPB.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. LM6144AIM/NOPB, LM6144AIMX/NOPB, LMV324IDT, LMV324IYDT, TS1854IDT, TS924AIDT, and TS924IDT are all ROHS3 compliant. All parts are suitable for applications with ROHS3 compliance requirements.

Q7: Which substitute parts are qualified for automotive applications?

A: LMV324IYDT, TS924AIDT, and TS924IDT carry AEC-Q100 qualification. LM6144AIM/NOPB, LM6144AIMX/NOPB, LMV324IDT, and TS1854IDT do not specify automotive qualification. For automotive applications, select from the AEC-Q100 qualified parts.

Q8: What is the operating temperature range for each part?

A: LM6144AIM/NOPB and LM6144AIMX/NOPB operate from -40°C to 85°C. LMV324IDT, LMV324IYDT, TS1854IDT, TS924AIDT, and TS924IDT operate from -40°C to 125°C. Applications requiring operation above 85°C must use STMicroelectronics substitutes.

Q9: Can I use TS924AIDT in place of LM6144AIM in a high-speed signal conditioning circuit?

A: Substitution depends on specific bandwidth requirements. LM6144AIM provides 18 MHz gain bandwidth product and 25 V/µs slew rate. TS924AIDT provides 4 MHz gain bandwidth product and 1.3 V/µs slew rate. If the application requires bandwidth above 4 MHz or slew rate above 1.3 V/µs, TS924AIDT is not suitable. Circuit analysis and testing are required to confirm compatibility.

Q10: Are the 14-SOIC packages for all parts physically identical?

A: Yes. All parts use 14-SOIC (0.154", 3.90 mm Width) surface-mount packaging. Physical footprint and pin configuration are identical across LM6144AIM/NOPB, LM6144AIMX/NOPB, LMV324IDT, LMV324IYDT, TS1854IDT, TS924AIDT, and TS924IDT. PCB layout modifications are not required for package compatibility.

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