PC81720NSZ Equivalent & Substitute Parts

Part Overview

The PC81720NSZ is a 5000Vrms optoisolator with transistor output manufactured by Sharp Microelectronics. This component provides galvanic isolation for single-channel DC input applications with a 4-DIP through-hole package. The device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The Sharp PC81720NSZ remains functionally available through alternative manufacturers offering compatible specifications.

Substiute Parts

PC81720NSZ

Sharp MicroelectronicsIn Stock: 796PC81720NSZ Datasheet

Current PartRFQ

HCPL-817-000E

Broadcom LimitedIn Stock: 3325HCPL-817-000E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PC81720NSZ is determined by the following critical parameters:

• Isolation Voltage: 5000Vrms minimum requirement
• Channel Configuration: Single channel only
• Output Stage: Transistor output topology
• Maximum Output Voltage: 70V or greater
• Maximum Output Current: 50mA or greater per channel
• Package Form Factor: 4-DIP through-hole configuration with 0.300" (7.62mm) spacing
• Operating Temperature Range: -30°C to 100°C minimum coverage
• Rise/Fall Time Characteristics: 4µs rise, 3µs fall time performance

The HCPL-817-000E manufactured by Broadcom Limited meets all substitution criteria across these parameters, providing direct functional equivalence for the obsolete PC81720NSZ.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-817-000E is the direct substitute for the obsolete PC81720NSZ. Selection between these parts is determined by product status and compliance requirements:

PC81720NSZ (Sharp): Obsolete status. RoHS non-compliant. Suitable only for legacy system maintenance or applications where RoHS compliance is not required.

HCPL-817-000E (Broadcom): Active product status. ROHS3 compliant. REACH unaffected. Recommended for new designs and production applications requiring regulatory compliance. The HCPL-817-000E demonstrates superior Vce saturation performance (200mV vs. 300mV), providing improved switching efficiency.

Both parts share identical isolation voltage, channel count, output type, voltage/current ratings, timing characteristics, temperature range, and package configuration. The HCPL-817-000E is available in tube packaging with 3279 units in stock, compared to 704 units of the obsolete PC81720NSZ.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-817-000E directly replace the PC81720NSZ in existing PCB designs?

A: Yes. Both components use the 4-DIP through-hole package with identical 0.300" (7.62mm) spacing. Pin-to-pin compatibility is confirmed. No PCB layout modifications are required.

Q: What are the key differences between these optoisolators?

A: The primary differences are product status and compliance. The PC81720NSZ is obsolete and RoHS non-compliant. The HCPL-817-000E is an active product with ROHS3 compliance and REACH unaffected status. The HCPL-817-000E also provides superior Vce saturation (200mV vs. 300mV).

Q: Are the electrical performance characteristics identical?

A: Isolation voltage, output voltage/current ratings, rise/fall times, and operating temperature ranges are identical. The HCPL-817-000E provides lower Vce saturation, which represents improved performance rather than a limitation.

Q: What packaging options are available for the substitute part?

A: The HCPL-817-000E is supplied in tube packaging. The original PC81720NSZ packaging specification was not provided in the available data.

Q: Is the HCPL-817-000E suitable for new product designs?

A: Yes. The HCPL-817-000E is an active product with current manufacturing support, ROHS3 compliance, and adequate inventory availability. It is the recommended choice for new designs requiring 5000Vrms single-channel optoisolation in 4-DIP form factor.