HCPL-4661 Equivalent & Substitute Parts

Part Overview

The HCPL-4661 is a logic output optoisolator manufactured by Broadcom Limited, featuring 2-channel open collector configuration with Schottky clamping. This component provides 3750Vrms isolation with 10MBd data rate capability and 15kV/µs common mode transient immunity. The part is currently active in production status with 1452 units in stock. Alternative equivalent parts are necessary to address supply chain flexibility, compliance requirements, and specific application performance needs.

Substiute Parts

HCPL-4661

Broadcom LimitedIn Stock: 1554HCPL-4661 Datasheet

Current PartRFQ

HCPL-4661-000E

Broadcom LimitedIn Stock: 5989HCPL-4661-000E Datasheet

DirectRFQ

VO4661

Vishay Semiconductor Opto DivisionIn Stock: 2503VO4661 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-4661 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Number of Channels: 2 (fixed requirement)
• Input Type: DC (fixed requirement)
• Package / Case: 8-DIP (0.300", 7.62mm) (fixed requirement)
• Mounting Type: Through Hole (fixed requirement)
• Voltage - Supply: 4.5V ~ 5.5V (fixed requirement)
• Common Mode Transient Immunity (Min): 15kV/µs (fixed requirement)
• Data Rate: 10MBd (fixed requirement)
• Current - Output / Channel: 50 mA (fixed requirement)

Secondary Compatibility Parameters (allowable variation):

• Voltage - Isolation: Minimum 3750Vrms (equal or higher acceptable)
• Output Type: Open Collector or Open Drain (functionally equivalent in most applications)
• Propagation Delay: Maximum 100ns (equal or lower acceptable)
• Operating Temperature: -40°C minimum, 85°C minimum (equal or wider range acceptable)
• RoHS Status: Both compliant and non-compliant versions acceptable based on application requirements

Parameter Comparison

Engineering Selection Recommendations

HCPL-4661-000E (Broadcom Limited): This part is a direct equivalent to the HCPL-4661, maintaining identical electrical specifications and package configuration. The primary distinction is RoHS3 compliance status. Selection of HCPL-4661-000E is appropriate for applications requiring RoHS compliance or when higher inventory availability (5900 units) is advantageous for supply chain planning.

VO4661 (Vishay Semiconductor Opto Division): This part meets all primary compatibility criteria with notable performance enhancements. The VO4661 provides higher isolation voltage (5300Vrms versus 3750Vrms), faster propagation delay (75ns versus 100ns), and extended operating temperature range (-40°C to 100°C versus -40°C to 85°C). The output configuration differs as open drain rather than open collector with Schottky clamping. Selection of VO4661 is appropriate for applications requiring enhanced isolation margin, improved timing performance, or extended temperature operation. RoHS3 compliance is available. Circuit design must accommodate the open drain output topology.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4661-000E be used as a direct replacement for HCPL-4661?

A: Yes. HCPL-4661-000E is electrically and mechanically identical to HCPL-4661. Both parts feature 2-channel configuration, 3750Vrms isolation, 10MBd data rate, and 8-DIP through-hole packaging. The primary difference is RoHS3 compliance status of the -000E variant.

Q: What is the key difference between HCPL-4661 and VO4661?

A: Both parts share identical channel count, data rate, CMTI, supply voltage, and output current specifications. Key differences include: VO4661 provides 5300Vrms isolation (versus 3750Vrms), faster propagation delay (75ns versus 100ns), open drain output topology (versus open collector with Schottky clamping), and extended operating temperature to 100°C (versus 85°C).

Q: Is VO4661 a pin-for-pin replacement for HCPL-4661?

A: VO4661 shares the same 8-DIP package footprint and pinout as HCPL-4661. However, the output stage topology differs (open drain versus open collector with Schottky clamping). Circuit design must accommodate this output configuration difference. Pull-up resistor requirements and load characteristics may differ between the two topologies.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: Both HCPL-4661-000E and VO4661 carry RoHS3 compliance certification. HCPL-4661-000E maintains identical specifications to the original HCPL-4661. VO4661 offers enhanced isolation and performance characteristics with RoHS3 compliance.

Q: Are all three parts suitable for high-speed digital isolation applications?

A: Yes. All three parts support 10MBd data rate with 15kV/µs common mode transient immunity. HCPL-4661 and HCPL-4661-000E feature 100ns maximum propagation delay. VO4661 provides faster 75ns maximum propagation delay, making it suitable for applications requiring improved timing performance.

Q: What inventory considerations apply to these parts?

A: HCPL-4661 has 1452 units in stock. HCPL-4661-000E offers higher availability with 5900 units. VO4661 has 2400 units available. Selection based on supply chain requirements and lead time considerations is appropriate.