1 Features

• Functional Safety-Capable (Planned)

– Documentation available to aid IEC 61508

system design

• Up to 150Mbps data rate

• Robust SiO2 isolation barrier:

– High lifetime at up to 1061VRMS and 1500VDC

working voltage

– Up to 5000VRMS isolation rating

– Up to 10.4kV surge capability

– Up to ±200kV/μs minimum CMTI

– Wide temperature range: –40°C to 125°C

ambient operating

• Supply range: 2.25V to 5.5V

• Overvoltage Tolerant Inputs

• Default output high ( ISO644x ) and low

( ISO644xF ) options

• Low propagation delay: 10ns maximum at 5V,

12ns maximum at 3.3V

• Supports SPI up to: 25MHz at 5V, 20.8MHz at

3.3V

• Low pulse width distortion: 1.8ns maximum at 5V,

2.2ns maximum at 3.3V

• Robust electromagnetic compatibility (EMC)

– System-level ESD, EFT, and surge immunity

– Low emissions

• Wide-SOIC (DW-16) Package

• Wide-SSOP (DFP-16) Package

• SSOP (DBQ-16) Package

• Safety-Related Certifications (Planned):

– DIN EN IEC 60747-17 (VDE 0884-17)

– UL 1577 component recognition program

– IEC 62368-1, IEC 61010-1, IEC 60601-1 and

GB 4943.1 certifications

2 Applications

• Power supplies

• Grid, Electricity meter

• Motor drives

• Factory automation

• Building automation

• Lighting

• Appliances

3 Description

The ISO644x devices are general purpose digital

isolators designed for applications requiring up to

5000VRMS isolation rating per UL 1577. The devices

are also certified by VDE, TUV, CSA, and CQC.

The ISO644x devices provide high EMC performance

while isolating CMOS or LVCMOS digital I/Os.

ISO644x uses SiO2 as the isolation barrier. Each

isolation channel has a logic input and output buffer

separated by the insulation barrier. These devices

come with enable pins that can be used to put the

respective outputs in high impedance.

The ISO6440 and ISO6440F devices have all

channels in the forward direction. The ISO6441

and ISO6441F devices have one reverse-direction

channel. The ISO6442 and ISO6442F devices have

two reverse-direction channels.

In the event of input power or signal loss, the default

output is high for devices without the suffix F and

low for devices with the suffix F. See the Device

Functional Modes section for further details.