6N137M Equivalent & Substitute Parts

Part Overview

The 6N137M is a logic output optoisolator designed for high-speed digital isolation applications. This single-channel device provides 5000Vrms isolation with open collector output configuration, supporting data rates up to 15MBd and common mode transient immunity of 10kV/µs. The component is actively produced and RoHS3 compliant, making it suitable for industrial and consumer electronics requiring galvanic isolation. Alternative models may be required due to inventory constraints, specific supply chain requirements, or application-specific performance needs.

Substiute Parts

6N137M

Lite-On Inc.In Stock: 243116N137M Datasheet

Current PartRFQ

6N137M

onsemiIn Stock: 243326N137M Datasheet

MFR RecommendedRFQ

HCPL-2300

Broadcom LimitedIn Stock: 5929HCPL-2300 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 6N137M are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Package type: 8-DIP (0.300", 7.62mm) form factor
• Output configuration: Open collector topology
• Isolation voltage: Minimum 5000Vrms
• Number of channels: Single channel (1)
• Input type: DC
• Mounting type: Through hole

Performance Compatibility Criteria:

• Data rate capability: Minimum 10MBd
• Common mode transient immunity: Minimum 10kV/µs
• Output current capability: Minimum 25 mA per channel
• Operating temperature range: Minimum -40°C to 85°C

The 6N137M (onsemi) maintains identical electrical specifications and package configuration, providing direct substitution. The HCPL-2300 (Broadcom Limited) operates within acceptable parameters for most applications but exhibits reduced isolation voltage (3750Vrms), lower data rate (5MBd), and reduced CMTI (100V/µs), limiting its use to applications with less stringent isolation and speed requirements.

Parameter Comparison

Engineering Selection Recommendations

6N137M (onsemi): This part is the preferred substitute for the 6N137M (Lite-On Inc.). Both devices share identical part numbers and specifications, with the onsemi version offering extended operating temperature range (-40°C to 100°C versus -85°C). Both are ROHS3 compliant and actively produced. Selection between these two sources depends on supply chain availability and procurement requirements.

HCPL-2300 (Broadcom Limited): This optoisolator is suitable only for applications where reduced isolation voltage (3750Vrms), lower data rate (5MBd), and reduced common mode transient immunity (100V/µs) are acceptable. The Schottky clamped output configuration provides faster switching characteristics in specific circuit topologies. This device is ROHS3 compliant and actively produced. Use this substitute only when application requirements do not demand the full 5000Vrms isolation or 10kV/µs CMTI of the primary device.

Frequently Asked Questions (FAQ)

Q: Can the 6N137M (onsemi) be used as a direct replacement for the 6N137M (Lite-On Inc.)?

A: Yes. Both devices carry identical part numbers and share the same electrical specifications, package configuration, and compliance certifications. The onsemi version provides an extended operating temperature range to 100°C. Direct substitution is supported without circuit modification.

Q: Is the HCPL-2300 a direct substitute for the 6N137M?

A: No. While both are single-channel optoisolators in 8-DIP packages, the HCPL-2300 has reduced isolation voltage (3750Vrms versus 5000Vrms), lower data rate (5MBd versus 15MBd), and significantly reduced common mode transient immunity (100V/µs versus 10kV/µs). Use the HCPL-2300 only in applications where these reduced specifications are acceptable.

Q: What are the key differences between the 6N137M and HCPL-2300?

A: The primary differences are isolation voltage (5000Vrms versus 3750Vrms), data rate capability (15MBd versus 5MBd), common mode transient immunity (10kV/µs versus 100V/µs), output current (50mA versus 25mA), and propagation delay (75ns versus 160-200ns). The HCPL-2300 also features Schottky clamping on the output stage.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The 6N137M (both Lite-On and onsemi versions) and HCPL-2300 are all ROHS3 compliant, meeting environmental and regulatory requirements for industrial and consumer applications.

Q: Can I use the HCPL-2300 in a high-speed isolation application?

A: The HCPL-2300 supports data rates up to 5MBd, which is lower than the 6N137M's 15MBd capability. For applications requiring data rates above 5MBd, the 6N137M is the appropriate choice. Additionally, the HCPL-2300's reduced CMTI (100V/µs) may not be suitable for circuits with fast-changing common mode voltages.

Q: What is the significance of the 10kV/µs common mode transient immunity specification?

A: Common mode transient immunity (CMTI) defines the maximum rate of change of common mode voltage that the optoisolator can tolerate without introducing errors. The 6N137M's 10kV/µs rating supports applications with rapidly switching high-voltage circuits. The HCPL-2300's 100V/µs rating is suitable only for slower switching environments.