Broadcom Limited HCPL-070L-000E

Product Summary Broadcom HCPL-070L-000E Optocoupler

The Broadcom HCPL-070L-000E is a high-gain optoisolator engineered to provide robust electrical isolation and signal integrity between logic circuits operating at different potentials or ground domains. Leveraging a combination of a light-emitting diode (LED) and an integrated high-gain photodetector, this single-channel device achieves extremely high current transfer ratios with minimal input drive. Packaged in an industry-standard SOIC-8 (Small Outline Integrated Circuit), the HCPL-070L-000E is optimized for surface-mount assembly, greatly reducing required PCB area compared to traditional DIP packages.

Engineers selecting the HCPL-070L-000E benefit from its LVTTL/LVCMOS compatibility, making it ideal for integration into modern low-voltage logic systems. With 3750 Vrms reinforced isolation and guaranteed performance over extended temperature ranges, the device serves critical applications demanding both high electrical safety and low power operation.

Main Attributes of the HCPL-070L-000E Family

At the core of the HCPL-070L-000E’s appeal is its high current transfer ratio (CTR), guaranteed to be at least 400% over a 0°C to +70°C ambient temperature range, even at a low input LED current of just 0.5 mA. This makes the device particularly suited to low-power designs, while still delivering strong output drive capability: up to 60 mA output current per channel.

Additional highlights include:

Dual supply voltage operation: compatible with both 3.3 V and 5 V logic rails.

LVTTL/LVCMOS interface compatibility, supporting seamless digital interfacing.

Base access terminal, enabling external tuning of gain-bandwidth for performance optimization.

Surface-mount SOIC-8 footprint, utilizing approximately one-third the area of a standard dual-in-line package.

Guaranteed performance over all specified electrical and thermal conditions.

Moisture Sensitivity Level (MSL): fully RoHS3 compliant and unaffected by REACH regulations for environmental safety.

These characteristics ensure a combination of low input drive, flexibility, and reliability essential for modern, size-constrained, and energy-efficient electronic systems.

Common Uses of HCPL-070L-000E in Technical Applications

In real-world engineering scenarios, the HCPL-070L-000E is deployed in a variety of roles where signal isolation and logic compatibility are paramount. Its low input current and robust isolation make it exceptionally useful for:

Ground isolation between LVTTL/LVCMOS or similar logic families, minimizing ground potential differences.

Low current line receiver applications, particularly where minimizing system power consumption is a key requirement.

High-voltage insulation for sensitive logic circuits interfacing with hazardous potentials.

EIA RS-232C compliant line receivers.

Telephone ring detectors requiring high sensitivity and isolation.

AC mains voltage status indication with ultra-low input power dissipation.

Low power systems relying on stringent ground isolation for safe and reliable operation.

The combination of high gain, low input current, and high output drive enables the HCPL-070L-000E to meet the demands of both traditional and emerging logic isolation applications.

Electrical Performance and Switching Specs of the HCPL-070L-000E

The HCPL-070L-000E is designed for dependable operation over a supply range of 3.3 V or 5 V, with logic-level input and output voltages. The guaranteed minimum CTR of 400% (across the full commercial temperature range and at low input drive) is central to its suitability for energy-efficient isolation.

Electrical specifications (typical conditions, TA = 25°C):

Input drive: 0.5 mA (minimum for guaranteed CTR), up to 12 mA maximum.

Output current: up to 60 mA per channel, suitable for direct interfacing with most logic or microcontroller input stages.

Output saturation voltage: compatible with LVTTL / LVCMOS input thresholds, supporting seamless downstream logic integration.

Isolation voltage: 3750 Vrms, UL 1577 rated for 1 minute, confirming its capability in high-insulation barrier designs.

Switching performance is engineered for modern digital communication needs, supporting high-speed operation with minimal propagation delays, while external base access further allows adjustment for specific bandwidth or gain requirements.

Structural, Packaging, and Assembly Details for HCPL-070L-000E

With its SOIC-8 surface-mount package, the HCPL-070L-000E offers straightforward PCB integration, minimizing assembly costs and space utilization. The lead profile aligns with standard surface-mount processes, and the device demonstrates robust coplanarity to ensure reliable soldering. To maximize noise immunity and device performance, a 0.1 μF bypass capacitor is recommended between pins 5 and 8, placed as close as practical to the device on the PCB.

Developers should observe standard handling precautions to prevent ESD-induced device degradation, guaranteeing longevity and in-circuit reliability.

Compliance Certifications and Insulation Features of the HCPL-070L-000E

The HCPL-070L-000E is comprehensively certified to meet international safety and insulation standards, including:

UL 1577 (Component Recognition Program): 3750 Vrms rating, File E55361.

CSA Component Acceptance Notice #5: File CA 88324.

IEC/EN/DIN EN 60747-5-2 (including VDE 0884 Part 2 for certain options).

These certifications assure system designers that the device meets the strict regulatory requirements for reinforced insulation and safe operation in demanding or hazardous environments. Compliance with RoHS3 and REACH ensures the device aligns with global environmental and materials safety directives.

Alternative/Substitute Models for the HCPL-070L-000E

For applications requiring similar form, fit, and function, engineers may consider related models from the Broadcom family, such as:

HCPL-073L: A surface-mount SOIC-8 device offering comparable isolation and CTR performance, with variant-specific features.

HCPL-270L and HCPL-273L: Both offer high gain and low input drive, with different packaging and mounting options (including DIP and surface-mount), allowing selection based on assembly process or footprint requirements.

When specifying replacements, engineers should cross-check package footprints, isolation voltage rating, and current transfer ratio to ensure compatibility with their design’s performance and safety criteria.

Conclusion

: Selecting HCPL-070L-000E for safety-critical and low-power designs

The Broadcom HCPL-070L-000E delivers a combination of high current transfer ratio at minimal input drive, robust 3750 Vrms isolation, and seamless integration with LVTTL/LVCMOS logic. Its compact SOIC-8 outline and regulatory compliance suit today’s high-density, safety-critical, and low-power electronic applications. Comprehensive features, industry-standard certifications, and related family models make the HCPL-070L-000E a well-rounded choice for engineers and procurement specialists tasked with specifying reliable optoisolators for next-generation systems.