ACPL-P349-000E Equivalent & Substitute Parts

Part Overview

The ACPL-P349-000E is a 1-channel optical isolation gate driver manufactured by Broadcom Limited, designed for high-voltage switching applications requiring galvanic isolation. This component provides 3750Vrms isolation with 2.5A peak output current capability in a 6-SOIC surface mount package. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining compatibility with the specified electrical and mechanical parameters of the application circuit.

Key Parameters

Parameter	Value	Unit
Isolation Voltage	3750	Vrms
Number of Channels	1	—
Peak Output Current	2.5	A
Output Supply Voltage Range	15–30	V
Common Mode Transient Immunity (Min)	50	kV/µs
Propagation Delay (Max)	110	ns
Operating Temperature Range	−40 to +105	°C
Package Type	6-SOIC (0.268", 6.80mm)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

The FOD8342 (onsemi) is identified as a substitute based on the following substitution criteria:

Compatible Parameters:

Single-channel optical isolation topology
6-SOIC surface mount package (0.268", 6.80mm width)
Output supply voltage range overlap (10–30V encompasses the 15–30V requirement)
RoHS3 compliance and unlimited MSL rating
Identical forward voltage characteristics (Vf ≈ 1.5V typical)
Maximum DC forward current (If = 25 mA)

Substitution Logic: The FOD8342 exceeds the isolation voltage requirement (5000Vrms vs. 3750Vrms specified), providing additional safety margin. Peak output current (3A vs. 2.5A) and continuous output current (2.5A vs. 2A) both exceed the main part specifications. These parameter exceedances do not create incompatibility; they represent enhanced performance headroom in the isolation and drive capability domains.

Parameter Comparison

Parameter	ACPL-P349-000E (Broadcom)	FOD8342 (onsemi)	Unit
Isolation Voltage	3750	5000	Vrms
Number of Channels	1	1	—
Peak Output Current	2.5	3.0	A
Output High Current	2.0	2.5	A
Output Low Current	2.0	2.5	A
Output Supply Voltage Range	15–30	10–30	V
Common Mode Transient Immunity (Min)	50	20	kV/µs
Propagation Delay (Max)	110	210	ns
Pulse Width Distortion (Max)	40	65	ns
Operating Temperature Range	−40 to +105	−40 to +100	°C
Package Type	6-SOIC	6-SOIC	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

Both the ACPL-P349-000E and FOD8342 are active production components with full RoHS3 compliance and identical moisture sensitivity ratings, making either suitable for new designs and production environments.

The ACPL-P349-000E offers superior common mode transient immunity (50 kV/µs) and faster propagation delay (110 ns maximum), which may be critical in high-speed switching applications or circuits with steep dV/dt transients.

The FOD8342 provides higher isolation voltage (5000Vrms), greater output current capability (3A peak), and lower minimum output supply voltage (10V vs. 15V), offering design flexibility in applications with lower supply rails or requiring additional isolation margin.

Selection between these parts should be based on the specific circuit requirements for transient immunity speed, isolation voltage margin, output current demand, and supply voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can FOD8342 directly replace ACPL-P349-000E in existing designs?

A: Physical and electrical compatibility exists due to identical 6-SOIC packaging and overlapping output supply voltage ranges. However, the FOD8342 exhibits longer propagation delay (210 ns vs. 110 ns) and lower common mode transient immunity (20 kV/µs vs. 50 kV/µs). Circuit timing and transient response characteristics must be evaluated before substitution.

Q: What are the key differences in isolation performance?

A: The FOD8342 provides 5000Vrms isolation compared to the ACPL-P349-000E at 3750Vrms. This represents a 33% increase in isolation voltage rating and provides additional safety margin in high-voltage applications.

Q: Are there temperature range limitations with FOD8342?

A: The FOD8342 operates from −40°C to +100°C, while the ACPL-P349-000E extends to +105°C. Applications requiring operation above 100°C must use the ACPL-P349-000E.

Q: Do both parts meet the same compliance standards?

A: Both components are RoHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1, unlimited). Both are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: What output current specifications should I consider?

A: The ACPL-P349-000E provides 2A continuous output current (high and low) with 2.5A peak capability. The FOD8342 provides 2.5A continuous output current with 3A peak capability, offering 25% greater drive strength.

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