KA3403D Equivalent & Substitute Parts

Part Overview

The KA3403D is a general-purpose operational amplifier integrated circuit manufactured by onsemi, configured as a 4-circuit device in a 14-SOP surface mount package. This component is classified as obsolete, indicating discontinued production and limited availability in the market. The KA3403D features a gain bandwidth product of 9 kHz and operates across a supply voltage range of 3 V to 36 V, making it suitable for low-frequency analog signal processing applications.

Due to its obsolete status, sourcing replacement units becomes necessary for ongoing production, maintenance, or redesign efforts. Active substitute parts with equivalent or superior electrical characteristics and compatible packaging are available from the same manufacturer, onsemi, providing direct functional replacement options.

Key Parameters

Parameter	KA3403D	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.4	V/µs
Gain Bandwidth Product	9	kHz
-3dB Bandwidth	1	MHz
Current - Input Bias	30	nA
Voltage - Input Offset	1.5	mV
Current - Supply	2.3	mA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 to 70	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the KA3403D is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Number of circuits: 4 (quad configuration)
Package type: 14-SOIC surface mount
Mounting type: Surface mount
Supply voltage range: Minimum 3 V, maximum ≥ 32 V
Amplifier type: General purpose

Performance Parameters Affecting Substitution:

Gain bandwidth product: 9 kHz (KA3403D) to 24 MHz (substitute range)
Slew rate: 0.4 V/µs (KA3403D) to 13 V/µs (substitute range)
Input bias current: 30 nA (KA3403D) to 300 nA (substitute range)
Input offset voltage: 1.5 mV (KA3403D) to 500 µV (substitute range)
Output current per channel: 20 mA (KA3403D) to 40 mA (substitute range)

Substitute parts maintain the same package footprint and pin configuration, ensuring mechanical and electrical compatibility. All substitute parts listed are active products with current manufacturing status and RoHS3 compliance, providing long-term availability and regulatory compliance advantages over the obsolete KA3403D.

Parameter Comparison

Parameter	KA3403D	LM224DR2G	LM2902DR2G	LM324ADR2G	LM324DR2G	MC3303DR2G	MC33074ADR2G	MC33074DR2G	MC33274ADR2G	MC3403DR2G	MC34074ADR2G	Unit
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4	—
Slew Rate	0.4	—	—	—	—	0.6	13	13	10	0.6	13	V/µs
Gain Bandwidth Product	9	1000	1000	1000	1000	1000	4500	4500	24000	1000	4500	kHz
Current - Input Bias	30	90	90	40	90	200	100	100	300	200	100	nA
Voltage - Input Offset	1.5	2	2	2	2	2	0.5	1	0.1	2	0.5	mV
Current - Output / Channel	20	40	40	40	40	30	30	30	37	30	30	mA
Voltage - Supply Span (Min)	3	3	3	3	3	3	3	3	3	3	3	V
Voltage - Supply Span (Max)	36	32	32	32	32	36	44	44	36	36	44	V
Operating Temperature	0 to 70	-25 to 85	-40 to 105	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85	0 to 70	0 to 70	°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	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	Active	Active	Active	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Direct Replacement for Identical Performance Profile:

LM324ADR2G and LM324DR2G are the closest functional equivalents to the KA3403D. Both maintain the same operating temperature range (0°C to 70°C), identical supply voltage minimum (3 V), and compatible maximum supply voltage (32 V). These parts feature lower input bias current (40 nA and 90 nA respectively) compared to the KA3403D (30 nA), and equivalent input offset voltage specifications. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

Enhanced Performance Alternatives:

MC3303DR2G and MC3403DR2G provide superior slew rate performance (0.6 V/µs versus 0.4 V/µs) while maintaining the same gain bandwidth product (1 MHz). These parts support the full supply voltage range of the KA3403D (3 V to 36 V) and offer extended operating temperature ranges. MC3403DR2G specifically matches the differential output configuration referenced in the KA3403D documentation.

High-Performance Substitutes:

MC33074ADR2G, MC33074DR2G, and MC34074ADR2G deliver significantly enhanced performance with slew rates of 13 V/µs and gain bandwidth products of 4.5 MHz. These parts support higher maximum supply voltages (44 V) and feature superior input offset voltage specifications (500 µV to 1 mV). MC34074ADR2G maintains the identical operating temperature range (0°C to 70°C) as the KA3403D.

MC33274ADR2G represents the highest performance option with a 24 MHz gain bandwidth product, 10 V/µs slew rate, and 100 µV input offset voltage, suitable for applications requiring enhanced bandwidth and precision.

Extended Temperature Range Options:

LM2902DR2G extends the operating temperature range to -40°C to 105°C, providing superior thermal performance for industrial and automotive applications while maintaining active product status and ROHS3 compliance.

All substitute parts maintain the 14-SOIC surface mount package footprint, ensuring direct mechanical compatibility with existing PCB designs. Selection should be based on specific application requirements for bandwidth, slew rate, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can I directly replace KA3403D with LM324DR2G without circuit modifications?

A: Yes. Both parts are quad general-purpose operational amplifiers in 14-SOIC packages with identical pin configurations. The LM324DR2G operates within the same supply voltage range (3 V to 32 V, which encompasses the KA3403D's 3 V to 36 V range for most practical applications). No circuit modifications are required for mechanical or electrical compatibility at the package level. However, verify that your specific application does not require the full 36 V maximum supply voltage of the KA3403D, as LM324DR2G is rated to 32 V maximum.

Q: What is the primary difference between MC3303DR2G and MC3403DR2G?

A: Both parts are quad general-purpose operational amplifiers with identical electrical specifications: 0.6 V/µs slew rate, 1 MHz gain bandwidth product, 200 nA input bias current, and 2 mV input offset voltage. The primary distinction is the output type: MC3303DR2G features standard output configuration, while MC3403DR2G features differential output configuration. Select based on your circuit's output requirements.

Q: Why do some substitute parts have higher gain bandwidth products than the KA3403D?

A: The KA3403D operates at 9 kHz gain bandwidth product, which is suitable for low-frequency signal processing applications. Substitute parts with higher gain bandwidth products (1 MHz to 24 MHz) provide enhanced frequency response and faster signal processing capabilities. These higher-performance parts remain backward compatible for low-frequency applications, as they can operate at reduced bandwidth when configured appropriately. Selection of higher-bandwidth parts depends on whether your application requires the additional performance or if the KA3403D's 9 kHz specification is sufficient.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (LM224DR2G, LM2902DR2G, LM324ADR2G, LM324DR2G, MC3303DR2G, MC33074ADR2G, MC33074DR2G, MC33274ADR2G, MC3403DR2G, and MC34074ADR2G) are certified ROHS3 compliant. The KA3403D's RoHS status is not specified in the available documentation. If RoHS3 compliance is a regulatory requirement for your application, all listed substitutes satisfy this requirement.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package is a surface mount package with 14 pins, 0.154 inches (3.90 mm) width. All substitute parts maintain this identical package specification, ensuring direct compatibility with existing PCB layouts, solder reflow profiles, and pick-and-place equipment programming. No PCB redesign or assembly process changes are required when substituting between parts with the same 14-SOIC package designation.

Q: Which substitute part offers the best input offset voltage performance?

A: MC33274ADR2G provides the lowest input offset voltage at 100 µV, compared to the KA3403D's 1.5 mV. MC33074ADR2G and MC34074ADR2G offer 500 µV input offset voltage. These enhanced specifications are beneficial for precision analog signal processing applications where input offset drift and accuracy are critical. For general-purpose applications, the higher input offset voltages of LM324 and LM2902 series parts (2 mV) remain acceptable.

Q: Can I use MC33274ADR2G as a direct replacement if my circuit operates at frequencies below 100 kHz?

A: Yes. MC33274ADR2G's 24 MHz gain bandwidth product and 10 V/µs slew rate provide superior performance compared to the KA3403D's 9 kHz bandwidth and 0.4 V/µs slew rate. The part operates within compatible supply voltage ranges (3 V to 36 V) and maintains the same 14-SOIC package. The enhanced performance characteristics do not create incompatibility at lower frequencies; the part simply provides additional performance margin. Verify that your circuit design does not depend on the KA3403D's specific low-bandwidth characteristics for stability or frequency response shaping.

Q: What is the inventory status of substitute parts?

A: All substitute parts are active products with substantial inventory availability: LM2902DR2G (205,100 pcs), LM324DR2G (105,300 pcs), LM224DR2G (105,200 pcs), MC34074ADR2G (70,200 pcs), MC33074DR2G (37,700 pcs), MC33274ADR2G (25,400 pcs), MC33074ADR2G (30,100 pcs), MC3403DR2G (20,100 pcs), LM324ADR2G (10,300 pcs), and MC3303DR2G (3,106 pcs). The KA3403D, being obsolete, has limited availability (2,080 pcs). Substitute parts provide superior long-term supply chain security.

Q: Do substitute parts support the full 36 V maximum supply voltage of the KA3403D?

A: Most substitute parts support 32 V maximum supply voltage (LM224DR2G, LM2902DR2G, LM324ADR2G, LM324DR2G, MC3303DR2G, MC33274ADR2G, MC3403DR2G). MC33074ADR2G, MC33074DR2G, and MC34074ADR2G support 44 V maximum supply voltage, exceeding the KA3403D's 36 V specification. If your application requires operation at voltages between 32 V and 36 V, select MC33074ADR2G, MC33074DR2G, or MC34074ADR2G to maintain full voltage range compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message