HCPL-0738-500E Equivalent & Substitute Parts

Part Overview

The HCPL-0738-500E is a Logic Output Optoisolator manufactured by Broadcom Limited, featuring 2-channel isolation with 3750Vrms voltage isolation and 10kV/µs common mode transient immunity. This component operates at 15MBd data rate with open collector output configuration and is housed in an 8-SO Tall surface mount package.

The HCPL-0738-500E is classified as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

HCPL-0738-500E

Broadcom LimitedIn Stock: 1742HCPL-0738-500E Datasheet

Current PartRFQ

ACPL-074L-500E

Broadcom LimitedIn Stock: 2320ACPL-074L-500E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-0738-500E is evaluated based on the following critical parameters that define functional compatibility:

Mandatory Matching Parameters:

• Number of Channels: 2
• Voltage - Isolation: 3750Vrms
• Common Mode Transient Immunity: 10kV/µs
• Input Type: DC
• Data Rate: 15MBd
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Allowable Variations:

• Output Type: Open Collector to Push-Pull/Totem Pole (functional upgrade)
• Current - Output / Channel: 2mA to 10mA (increased capability)
• Propagation Delay: 60ns to 50ns (improved performance)
• Voltage - Supply: Extended range acceptable (3V ~ 3.6V, 4.5V ~ 5.5V)
• Operating Temperature: Extended range acceptable (-40°C ~ 105°C)
• Product Status: Obsolete to Active (supply availability improvement)

The ACPL-074L-500E qualifies as a substitute based on these criteria, offering enhanced output drive capability and active product status while maintaining all mandatory electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

ACPL-074L-500E as Primary Substitute:

The ACPL-074L-500E is the recommended substitute for the obsolete HCPL-0738-500E. Both components are manufactured by Broadcom Limited and share identical isolation voltage, CMTI rating, data rate, and package specifications.

The ACPL-074L-500E offers the following advantages:

• Active product status ensures ongoing availability and manufacturing support
• ROHS3 compliance provides regulatory alignment for current production standards
• Push-Pull output configuration delivers 10mA per channel versus 2mA, providing enhanced drive capability for downstream logic circuits
• Improved propagation delay (50ns versus 60ns) supports higher-speed signal integrity requirements
• Extended supply voltage range (3V ~ 3.6V addition) enables operation in low-voltage applications
• Extended operating temperature range (-40°C ~ 105°C) supports broader thermal environments

The output topology change from open collector to push-Pull/Totem Pole requires circuit evaluation. Applications utilizing pull-up resistors with open collector outputs must be redesigned to accommodate active push-pull drive. This change is functionally compatible for standard logic interface applications.

Frequently Asked Questions (FAQ)

Q: Can the ACPL-074L-500E directly replace the HCPL-0738-500E without circuit modification?

A: Direct pin-for-pin replacement is possible due to identical package and pinout. However, the output topology differs: HCPL-0738-500E uses open collector output while ACPL-074L-500E uses push-pull/totem pole output. Applications relying on external pull-up resistors must be evaluated and potentially redesigned. The push-pull output eliminates the need for pull-up resistors and provides active high and low drive.

Q: What are the key electrical differences between these parts?

A: The primary differences are output type and output current capability. ACPL-074L-500E provides 10mA per channel versus 2mA for HCPL-0738-500E, and features faster propagation delay (50ns versus 60ns). All isolation, CMTI, data rate, and package specifications are identical.

Q: Is the ACPL-074L-500E compatible with the same PCB footprint?

A: Yes. Both components use the 8-SOIC (0.154", 3.90mm Width) package with identical pin spacing and mounting type (surface mount). PCB footprints are directly compatible.

Q: What is the impact of the extended supply voltage range in ACPL-074L-500E?

A: The ACPL-074L-500E supports 3V ~ 3.6V in addition to the standard 4.5V ~ 5.5V range. This enables operation in low-voltage applications. The HCPL-0738-500E is limited to 4.5V ~ 5.5V. Designs operating at 3V ~ 3.6V require the ACPL-074L-500E.

Q: Are there compliance or regulatory differences?

A: The ACPL-074L-500E carries ROHS3 compliance certification, while the HCPL-0738-500E does not specify RoHS status. Both components are REACH Unaffected and classified as EAR99 for export control purposes. Both share identical HTSUS classification (8541.49.8000).

Q: What is the moisture sensitivity level for both parts?

A: Both the HCPL-0738-500E and ACPL-074L-500E are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.