HCPL-900J-500 Digital Isolator Equivalent & Substitute Parts

Part Overview

The HCPL-900J-500 is a general purpose digital isolator manufactured by Broadcom Limited, featuring 2500Vrms isolation, 4 channels, and 110MBd data rate in a 16-SOIC package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The HCPL-900J-500 utilizes GMR (Giant Magnetoresistive) technology and operates across -55°C to 125°C with supply voltages from 3V to 5.5V.

Substiute Parts

HCPL-900J-500

Broadcom LimitedIn Stock: 765HCPL-900J-500 Datasheet

Current PartRFQ

HCPL-900J-500E

Broadcom LimitedIn Stock: 1187HCPL-900J-500E Datasheet

DirectRFQ

IL 715-3

NVE Corp/Isolation ProductsIn Stock: 5700IL 715-3 Datasheet

MFR RecommendedRFQ

IL 715-3E

NVE Corp/Isolation ProductsIn Stock: 8866IL 715-3E Datasheet

MFR RecommendedRFQ

IL 715-3ETR7

NVE Corp/Isolation ProductsIn Stock: 756IL 715-3ETR7 Datasheet

MFR RecommendedRFQ

IL 715T-3

NVE Corp/Isolation ProductsIn Stock: 911IL 715T-3 Datasheet

MFR RecommendedRFQ

IL 715T-3E

NVE Corp/Isolation ProductsIn Stock: 967IL 715T-3E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-900J-500 is determined by the following critical parameters:

• Isolation Voltage: 2500Vrms (all substitutes meet this requirement)
• Number of Channels: 4 unidirectional channels (all substitutes match)
• Data Rate: 110MBd/110Mbps (all substitutes meet or exceed this specification)
• Propagation Delay: 15ns maximum (all substitutes meet this requirement)
• Supply Voltage Range: 3V ~ 5.5V (all substitutes support this range)
• Package Type: 16-SOIC surface mount (all substitutes use 16-SOIC, though with different physical dimensions)
• Technology: GMR-based isolation (all substitutes use GMR technology)

The primary substitute source is NVE Corp/Isolation Products, offering the IL 715 series with equivalent electrical performance. The HCPL-900J-500E from Broadcom is a direct packaging variant with improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Broadcom Ecosystem): The HCPL-900J-500E is the recommended direct substitute, offering identical electrical specifications and pinout compatibility. It maintains the same 16-SOIC package dimensions (0.295", 7.50mm width) and operating temperature range (-55°C to 125°C). The primary advantage is ROHS3 compliance, addressing regulatory requirements for new designs.

Cross-Manufacturer Substitutes (NVE IsoLoop® Series): The IL 715 series parts (IL 715-3, IL 715-3E, IL 715-3ETR7, IL 715T-3, IL 715T-3E) provide functional equivalence with superior common mode transient immunity (100kV/µs versus 15kV/µs). These parts use a narrower 16-SOIC package (0.154", 3.90mm width), which may require PCB layout verification for pin-to-pin compatibility despite identical pinout.

Temperature Range Considerations: IL 715-3 and IL 715-3E variants operate at -40°C to 100°C, which is narrower than the original HCPL-900J-500 specification. IL 715T-3 and IL 715T-3E extend the upper temperature limit to 125°C, matching the original part's full range.

Compliance Status: For applications requiring RoHS3 compliance, select HCPL-900J-500E, IL 715-3E, IL 715-3ETR7, or IL 715T-3E. Non-compliant variants remain available for legacy systems.

Availability: NVE IsoLoop® parts demonstrate higher inventory levels (658–8807 units), providing supply chain stability compared to the discontinued Broadcom original.

Frequently Asked Questions (FAQ)

Q: Can IL 715 series parts directly replace HCPL-900J-500 in existing designs?

A: Electrical substitution is valid based on matching isolation voltage (2500Vrms), channel count (4), data rate (110Mbps/MBd), propagation delay (15ns), and supply voltage range (3V–5.5V). However, the IL 715 series uses a narrower 16-SOIC package (0.154" versus 0.295" width). PCB layout verification is required to confirm pin-to-pin spacing compatibility, though pinout is identical.

Q: What is the significance of the higher common mode transient immunity in IL 715 parts?

A: IL 715 series parts specify 100kV/µs CMTI compared to 15kV/µs for HCPL-900J-500. This parameter defines the maximum rate of voltage change the isolator can withstand without data corruption. Higher CMTI provides improved noise immunity in high-speed switching environments but does not affect basic substitution eligibility when the original specification is met.

Q: Are there temperature range limitations when substituting with IL 715-3 or IL 715-3E?

A: IL 715-3 and IL 715-3E operate at -40°C to 100°C, which is narrower than HCPL-900J-500 (-55°C to 125°C). Applications requiring the full -55°C to 125°C range must use IL 715T-3 or IL 715T-3E variants, which extend the upper limit to 125°C.

Q: What packaging differences exist between Broadcom and NVE variants?

A: Both use 16-SOIC surface mount packages with identical pinout. The physical difference is package width: Broadcom HCPL-900J series uses 0.295" (7.50mm), while NVE IL 715 series uses 0.154" (3.90mm). This affects PCB footprint and requires layout verification before substitution.

Q: Which substitute part offers the best compliance and availability?

A: IL 715-3E combines ROHS3 compliance with the highest inventory availability (8807 units) and active product status. For applications requiring extended temperature range, IL 715T-3E provides equivalent compliance with -40°C to 125°C operation.

Q: Is HCPL-900J-500E a true equivalent or a variant?

A: HCPL-900J-500E is a direct Broadcom equivalent with identical electrical specifications, pinout, and package dimensions. The primary difference is packaging format (Tape & Reel) and ROHS3 compliance status. It is the preferred substitute within the Broadcom product family.