LM432MAX Equivalent & Substitute Parts

Part Overview

The LM432MAX is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a 2-circuit device in 8-SOIC surface mount packaging. This part is classified as obsolete, indicating discontinued production and limited availability for new designs. The LM432MAX operates across a supply voltage range of 2.5 V to 16 V with a gain bandwidth product of 1 MHz, suitable for low-frequency analog signal processing applications. Due to its obsolete status, identifying functionally compatible substitute components is essential for design continuity, production support, and long-term component sourcing.

Key Parameters

Parameter	LM432MAX Value
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Gain Bandwidth Product	1 MHz
Current - Input Bias	3 nA
Voltage - Input Offset	600 µV
Current - Supply	150 µA (x2 Channels)
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	16 V
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LM432MAX is determined by the following critical parameters: package compatibility (8-SOIC form factor), dual-circuit configuration, surface mount technology, and electrical operating ranges. The substitute parts are grouped into two technology categories based on amplifier type:

Category 1: J-FET Amplifier Technology The TL072CDT represents a J-FET based alternative with enhanced performance characteristics including higher gain bandwidth product (4 MHz), lower input bias current (20 pA), and extended supply voltage range (6 V to 36 V). This substitute maintains the 8-SOIC package and dual-circuit configuration.

Category 2: CMOS Amplifier Technology The TS272 series (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) and TS27L2 series (TS27L2ACDT, TS27L2AIDT, TS27L2BIDT, TS27L2CD) provide CMOS-based alternatives. The TS272 variants offer moderate gain bandwidth product (3.5 MHz) with ultra-low input bias current (1 pA), while TS27L2 variants provide ultra-low power consumption (10 µA supply current) with reduced bandwidth (100 kHz). All maintain 8-SOIC packaging and dual-circuit configuration.

Key Substitution Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Number of Circuits: 2
Mounting Type: Surface Mount
Voltage - Supply Span compatibility with 2.5 V to 16 V range
Current - Output / Channel: minimum 30 mA

Parameter Comparison

Parameter	LM432MAX	TL072CDT	TS272ACDT	TS272AIDT	TS272BIDT	TS272CDT	TS272IDT	TS27L2ACDT	TS27L2AIDT	TS27L2BIDT	TS27L2CD
Amplifier Type	General Purpose	J-FET	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Gain Bandwidth Product	1 MHz	4 MHz	3.5 MHz	3.5 MHz	3.5 MHz	3.5 MHz	3.5 MHz	100 kHz	100 kHz	100 kHz	100 kHz
Current - Input Bias	3 nA	20 pA	1 pA	1 pA	1 pA	1 pA	1 pA	1 pA	1 pA	1 pA	1 pA
Voltage - Input Offset	600 µV	3 mV	900 µV	900 µV	250 µV	1.1 mV	1.1 mV	900 µV	1.1 mV	250 µV	1.1 mV
Current - Supply	150 µA (x2)	1.4 mA	1 mA (x2)	1 mA (x2)	1 mA (x2)	1 mA (x2)	1 mA (x2)	10 µA (x2)	10 µA (x2)	10 µA (x2)	10 µA (x2)
Current - Output / Channel	30 mA	40 mA	45 mA	45 mA	45 mA	45 mA	45 mA	45 mA	45 mA	45 mA	45 mA
Voltage - Supply Span (Min)	2.5 V	6 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	16 V	36 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Active Production and New Designs:

All substitute parts listed are classified as Active products with current manufacturing status, ensuring long-term availability and supply chain stability. This contrasts directly with the LM432MAX obsolete status.

RoHS Compliance Consideration:

The LM432MAX is RoHS non-compliant. All substitute parts (TL072CDT, TS272 series, TS27L2 series) are ROHS3 compliant, meeting current environmental and regulatory requirements for commercial and industrial applications.

Supply Voltage Compatibility:

The LM432MAX operates from 2.5 V minimum. The TL072CDT requires 6 V minimum, which may not be suitable for 2.5 V to 5 V supply applications. The TS272 and TS27L2 series support 3 V minimum, providing broader compatibility with the original 2.5 V to 16 V range, though applications requiring 2.5 V operation must use TS272 or TS27L2 variants with careful circuit design.

Temperature Range Selection:

For applications requiring the full -40°C to 85°C operating range of the LM432MAX, select TS272AIDT, TS272BIDT, TS272IDT, TS27L2AIDT, or TS27L2BIDT, which support -40°C to 125°C operation. The TL072CDT and standard temperature variants (TS272ACDT, TS272CDT, TS27L2ACDT, TS27L2CD) are limited to 0°C to 70°C.

Power Consumption Profile:

For battery-powered or ultra-low-power applications, the TS27L2 series (100 kHz bandwidth, 10 µA supply current) provides significant power reduction compared to the LM432MAX (150 µA supply current). The TS272 series (1 mA supply current) represents a moderate increase in power consumption but offers higher bandwidth (3.5 MHz).

Bandwidth and Slew Rate Requirements:

Applications requiring 1 MHz bandwidth or lower should use TS27L2 variants (100 kHz, 0.04 V/µs slew rate). Applications requiring higher bandwidth should use TS272 variants (3.5 MHz, 5.5 V/µs slew rate) or TL072CDT (4 MHz, 16 V/µs slew rate).

Frequently Asked Questions (FAQ)

Q: Can the TL072CDT directly replace the LM432MAX in all applications?

A: The TL072CDT shares the 8-SOIC package and dual-circuit configuration, but has a 6 V minimum supply voltage requirement compared to the LM432MAX 2.5 V minimum. Applications operating below 6 V cannot use TL072CDT. Additionally, TL072CDT is limited to 0°C to 70°C operation, which may not cover the full -40°C to 85°C range of the original part.

Q: What is the difference between TS272 and TS27L2 series?

A: The TS272 series provides 3.5 MHz gain bandwidth product with 1 mA supply current per dual-channel configuration. The TS27L2 series provides 100 kHz gain bandwidth product with 10 µA supply current per dual-channel configuration. Select TS272 for higher-frequency applications and TS27L2 for ultra-low-power applications.

Q: Are all substitute parts available in the same packaging options as the LM432MAX?

A: All substitute parts are available in 8-SOIC surface mount packaging. However, packaging options (Cut Tape, Tape & Reel, Tube) vary by part number. Verify specific packaging availability (TS272ACDT is Cut Tape, TS272BIDT is Tape & Reel, TS27L2CD is Tube) based on procurement requirements.

Q: Which substitute part best matches the LM432MAX electrical specifications?

A: The TS272BIDT provides the closest match with 250 µV input offset voltage (versus 600 µV for LM432MAX), 45 mA output current (versus 30 mA), and -40°C to 125°C operating range that exceeds the original -40°C to 85°C specification. However, it requires 3 V minimum supply versus 2.5 V for the original.

Q: Is the LM432MAX still available for purchase?

A: The LM432MAX is classified as obsolete with discontinued production. Substitute parts from the TS272 and TS27L2 series are actively manufactured and widely available through authorized distributors.

Q: What compliance certifications apply to the substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected. The TL072CDT carries AEC-Q100 automotive qualification. All parts share the same ECCN (EAR99) and HTSUS (8542.33.0001) classifications as the original LM432MAX.

Q: Can I use TS27L2 variants in high-frequency signal processing applications?

A: The TS27L2 series is limited to 100 kHz gain bandwidth product, making it unsuitable for applications requiring higher frequency response. Use TS272 series (3.5 MHz) or TL072CDT (4 MHz) for high-frequency applications.

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