Description
The HCPL-261A family of optically coupled gates shown on this data sheet provide all the benefits of the industry standard 6N137 family with the added benefit of HCMOS compatible input current. This allows direct interface to all common circuit topologies without additional LED buffer or drive components. The Al-GaAs LED used allows lower drive currents and reduces degradation by using the latest LED technology. On the single channel parts, an enable output allows the detector to be strobed. The output of the detector IC is an open collector schottky-clamped transistor. The internal shield provides a minimum common mode transient immunity of 1000 V/μs for the HCPL-261A family and 15000 V/μs for the HCPL-261N family.

Features
• HCMOS/LSTTL/TTL performance compatible
• 1000 V/μs minimum Common Mode Rejection (CMR) at VCM = 50 V (HCPL-261A family) and 15 kV/μs minimum CMR at VCM = 1000 V (HCPL-261N family)
• High speed: 10 MBd typical
• AC and DC performance specified over industrial temperature range -40°C to +85°C
• Available in 8 pin DIP, SOIC-8 packages
• Safety approval:
– UL recognized per UL1577 3750 V rms for 1 minute and 5000 V rms for 1 minute (Option 020)
– CSA Approved
– IEC/EN/DIN EN 60747-5-5 approved

Applications
• Low input current (3.0 mA) HCMOS compatible version of 6N137 optocoupler
• Isolated line receiver
• Simplex/multiplex data transmission
• Computer-peripheral interface
• Digital isolation for A/D, D/A conversion
• Switching power supplies
• Instrumentation input/output isolation
• Ground loop elimination
• Pulse transformer replacement