1 Features

1• Highest Signaling Rate: 1 Mbps

• Propagation Delay Less Than 20 ns

• Low-Power Consumption

• Wide Ambient Temperature: –40°C to 105°C

• 50 kV/μs Transient Immunity Typical

• Operates From 3.3-V or 5-V Supply and Logic

Levels

• 3.3-V and 5.0-V Level Translation

• Safety and Regulatory Approvals

– 6000 VPK Isolation per DIN V VDE V 0884-10

and DIN EN 61010-1

– 4243 VRMS Isolation for 1 Minute per UL 1577

– CSA Component Acceptance Notice 5A, IEC

60950-1, IEC 61010-1, and IEC 60601-1 End

Equipment Standards

– TUV 5000 V RMS Isolation per EN 60950-1 and

EN 61010-1

– CQC Certification per GB4943.1-2011

2 Applications

• Opto-Coupler Replacement in:

– Industrial Field-Buses

– ProfiBuses

– ModBuses

– DeviceNet™ Data Buses

– Servo Control Interfaces

– Motor Control

– Power Supplies

– Battery Packs

3 Description

The ISO7520C and ISO7521C provide galvanic

isolation of up to 4243 VRMS for 1 minute per UL and 6000 VPK per VDE. These devices are also certified

to 5000 VRMS reinforced insulation per end equipment

standards IEC 60950-1, IEC 61010-1, and IEC

60601-1. These digital isolators have two isolated channels with unidirectional (ISO7520C) and

bidirectional (ISO7521C) channel configurations.

Each isolation channel has a logic input and output

buffer separated by a silicon oxide (SiO2) insulation

barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a

data bus or other circuits from entering the local

ground and interfering with or damaging sensitive

circuitry. The devices have TTL input thresholds and

can operate from 3.3- and 5-V supplies. All inputs are

5-V tolerant when supplied from 3.3-V supplies.

NOTE: The ISO7520C and ISO7521C are specified

for signaling rates up to 1 Mbps. Due to their fast

response time, these devices will also transmit faster data with much shorter pulse widths. Designers must

add external filtering to remove spurious signals with

input pulse duration