H11L1 Optoisolator Equivalent & Substitute Parts

Part Overview

The H11L1 is a logic output optoisolator manufactured by onsemi, designed for galvanic isolation in single-channel applications. It features an open collector output, 1MHz data rate capability, and 5300Vrms isolation voltage rating. The H11L1 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across isolation voltage, channel configuration, output type, and package form factor while meeting current product availability and compliance standards.

Substiute Parts

H11L1

onsemiIn Stock: 6158H11L1 Datasheet

Current PartRFQ

H11L1M

onsemiIn Stock: 50432H11L1M Datasheet

DirectRFQ

H11L1

onsemiIn Stock: 6158H11L1 Datasheet

DirectRFQ

6N136

onsemiIn Stock: 501706N136 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11L1 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Single-channel configuration (1 channel required)
• Open collector output type (maintains logic-level interface compatibility)
• 6-DIP through-hole package (physical and pin compatibility)
• DC input type
• Isolation voltage rating of 5300Vrms or higher (maintains or exceeds isolation specification)
• 1MHz or higher data rate capability
• 50mA or higher output current rating

Secondary Considerations:

• Product status (active vs. obsolete)
• RoHS and regulatory compliance
• Forward current and supply voltage specifications where applicable

The H11L1M qualifies as a direct substitute, maintaining identical channel count, output type, package, and data rate while meeting the isolation voltage requirement. The 6N136 is classified as a similar part due to differences in output type (transistor with base vs. open collector), package size (8-DIP vs. 6-DIP), and lower isolation voltage rating (2500Vrms vs. 5300Vrms), making it suitable only for applications where these parameter differences are acceptable.

Parameter Comparison

Engineering Selection Recommendations

H11L1M (Direct Substitute): The H11L1M is the primary substitute for the H11L1. Both parts share identical channel count, output type, package configuration, and data rate. The H11L1M is currently in active production status with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the H11L1. The isolation voltage rating of 4170Vrms on the H11L1M is lower than the H11L1 specification of 5300Vrms; applications requiring the full 5300Vrms isolation rating must evaluate whether the 4170Vrms rating meets system requirements. The H11L1M supports higher forward current (30mA maximum vs. 1.6mA) and includes specified operating temperature range (-40°C to 85°C) and supply voltage range (3V to 15V), providing improved design flexibility.

6N136 (Similar Part): The 6N136 is classified as a similar part rather than a direct substitute due to three significant parameter differences: output type (transistor with base vs. open collector), package size (8-DIP vs. 6-DIP), and isolation voltage (2500Vrms vs. 5300Vrms). The 6N136 is suitable only for applications where these differences are acceptable and where the lower isolation voltage rating does not compromise system safety or performance requirements. The 6N136 is also obsolete, limiting its utility for new designs.

Frequently Asked Questions (FAQ)

Q: Can the H11L1M directly replace the H11L1 in existing designs?

A: The H11L1M is pin-compatible and functionally equivalent for most applications. The primary consideration is the reduced isolation voltage rating (4170Vrms vs. 5300Vrms). If the application circuit design requires the full 5300Vrms isolation specification, the H11L1M may not be suitable. If the application can operate with 4170Vrms isolation, the H11L1M is a direct replacement.

Q: Why is the 6N136 listed as a similar part rather than a direct substitute?

A: The 6N136 differs from the H11L1 in three critical parameters: it uses a transistor with base output instead of open collector, requires an 8-DIP package instead of 6-DIP, and provides only 2500Vrms isolation instead of 5300Vrms. These differences require circuit redesign and are not pin-compatible. The 6N136 is suitable only when application requirements can accommodate these parameter changes.

Q: What is the impact of the H11L1M's higher forward current specification?

A: The H11L1M supports a maximum forward current of 30mA compared to the H11L1's 1.6mA. This allows the H11L1M to operate with higher input LED current, potentially improving switching speed and noise immunity. Existing circuit designs using the H11L1 forward current specification will operate correctly with the H11L1M without modification.

Q: Does the H11L1M's ROHS3 compliance affect compatibility?

A: ROHS3 compliance indicates the H11L1M meets current environmental and regulatory standards. For applications subject to RoHS requirements, the H11L1M is preferable to the H11L1, which is RoHS non-compliant. For applications without RoHS requirements, ROHS3 compliance does not affect electrical or functional compatibility.

Q: Are there package considerations when substituting the H11L1?

A: The H11L1 and H11L1M both use 6-DIP packages and are physically and electrically compatible. The 6N136 uses an 8-DIP package and requires PCB layout modification and potential circuit redesign. If package compatibility is required, only the H11L1M is suitable.