FOD053L Optoisolator - Equivalent & Substitute Parts

Part Overview

The FOD053L is a 2-channel optoisolator with transistor output manufactured by onsemi, rated for 2500Vrms isolation voltage. This component is designed for applications requiring galvanic isolation between input and output circuits in 8-SOIC surface mount packages. The part maintains active product status with robust inventory availability (1588 pcs in stock). Substitute parts are identified to address application requirements for higher isolation voltage ratings, extended temperature ranges, or alternative packaging configurations while maintaining functional compatibility in 2-channel transistor output optoisolator applications.

Key Parameters

Parameter	FOD053L
Manufacturer	onsemi
Number of Channels	2
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Output Type	Transistor
Voltage - Output (Max)	7V
Current - Output / Channel	8mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FOD053L are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Number of Channels: 2 (all substitutes maintain 2-channel configuration)
Output Type: Transistor (all substitutes provide transistor output)
Current - Output / Channel: 8mA (all substitutes support 8mA per channel)
Mounting Type: Surface Mount (all substitutes are surface mount)
Package / Case: 8-SOIC form factor (all substitutes use 8-SOIC or equivalent 8-SO packaging)

Allowable Variation Parameters:

Voltage - Isolation: Substitutes rated at 3750Vrms exceed the 2500Vrms requirement, providing enhanced isolation capability
Current Transfer Ratio: Substitutes demonstrate higher CTR performance (93-200% @ 3mA vs. 15-50% @ 16mA), indicating improved efficiency
Voltage - Output (Max): Substitutes rated at 24V exceed the 7V specification, supporting broader application voltage ranges
Operating Temperature: Extended ranges (-55°C ~ 100°C or -40°C ~ 105°C) accommodate wider environmental conditions
Turn On / Turn Off Time: Substitutes specify faster switching (200ns/380ns or 200ns/600ns vs. 1µs/1µs), enabling higher-frequency applications

All substitute parts maintain ROHS3 compliance, MSL Level 1, and active product status.

Parameter Comparison

Parameter	FOD053L (onsemi)	ACPL-054L-000E (Broadcom)	ACPL-054L-500E (Broadcom)	ACPL-054L-560E (Broadcom)	HCPL-053L-000E (Broadcom)	HCPL-053L-500E (Broadcom)
Number of Channels	2	2	2	2	2	2
Voltage - Isolation	2500Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Current Transfer Ratio (Min)	15% @ 16mA	93% @ 3mA	93% @ 3mA	93% @ 3mA	19% @ 16mA	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA	200% @ 3mA	200% @ 3mA	200% @ 3mA	50% @ 16mA	50% @ 16mA
Turn On / Turn Off Time (Typ)	1µs, 1µs	200ns, 380ns	200ns, 380ns	200ns, 380ns	200ns, 600ns	200ns, 600ns
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	7V	24V	24V	24V	7V	7V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.45V	1.5V	1.5V	1.5V	1.5V	1.5V
Current - DC Forward (If) (Max)	25mA	20mA	20mA	20mA	25mA	25mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ACPL-054L Series (ACPL-054L-000E, ACPL-054L-500E, ACPL-054L-560E): These Broadcom parts provide 3750Vrms isolation with significantly enhanced current transfer ratio performance (93-200% @ 3mA). The 24V maximum output voltage supports higher-voltage applications. Faster switching times (200ns/380ns) enable higher-frequency signal isolation. Available in both Tube and Cut Tape packaging options. Operating temperature range extends to 105°C. Selection among the three variants depends on packaging preference: Tube (ACPL-054L-000E), Cut Tape standard reel (ACPL-054L-500E), or Cut Tape Digi-Reel (ACPL-054L-560E).

HCPL-053L Series (HCPL-053L-000E, HCPL-053L-500E): These Broadcom parts maintain the 7V maximum output voltage specification matching the FOD053L, ensuring direct compatibility with circuits designed for lower output voltage levels. The 3750Vrms isolation rating provides enhanced isolation margin. Current transfer ratio remains comparable to the FOD053L (19-50% @ 16mA). Extended operating temperature range (-55°C ~ 100°C) accommodates demanding thermal environments. Faster switching times (200ns/600ns) support higher-frequency applications. Selection between variants depends on packaging: Tube (HCPL-053L-000E) or Cut Tape (HCPL-053L-500E).

All substitute parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can ACPL-054L parts directly replace FOD053L in existing designs? A: ACPL-054L parts are functionally compatible as 2-channel transistor output optoisolators in 8-SOIC packages. The higher isolation voltage (3750Vrms vs. 2500Vrms) and faster switching times (200ns/380ns vs. 1µs/1µs) provide enhanced performance. However, the 24V maximum output voltage differs from the FOD053L's 7V specification. Circuit designs operating at output voltages above 7V benefit from this enhancement; designs limited to 7V operation remain compatible.

Q: What is the difference between HCPL-053L and ACPL-054L substitutes? A: Both series provide 3750Vrms isolation and faster switching than the FOD053L. The HCPL-053L maintains the 7V maximum output voltage of the FOD053L, making it the preferred choice for circuits with strict output voltage constraints. The ACPL-054L provides 24V maximum output voltage, supporting broader application voltage ranges. Current transfer ratio specifications differ: HCPL-053L matches FOD053L CTR characteristics (19-50% @ 16mA), while ACPL-054L provides higher CTR (93-200% @ 3mA).

Q: Are packaging differences between substitute parts significant? A: All substitute parts use 8-SOIC surface mount packages with identical 0.154" (3.90mm) width, ensuring PCB footprint compatibility. Packaging variants (Tube, Cut Tape standard reel, Cut Tape Digi-Reel) reflect supply chain and manufacturing options rather than electrical or mechanical differences. Selection depends on procurement and assembly process requirements.

Q: Which substitute part offers the widest operating temperature range? A: HCPL-053L series parts specify -55°C ~ 100°C operating temperature, providing the widest range. ACPL-054L series parts specify -40°C ~ 105°C. The FOD053L operates from -40°C ~ 85°C. Applications requiring operation below -40°C or above 105°C should select HCPL-053L parts.

Q: Do all substitute parts maintain the same input/output current specifications? A: All substitute parts maintain 8mA maximum output current per channel, matching the FOD053L. Input forward current specifications vary slightly: FOD053L and HCPL-053L specify 25mA maximum, while ACPL-054L parts specify 20mA maximum. This difference reflects design optimization and does not affect functional compatibility in standard applications.

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