ISO164x Hot-Swappable Bidirectional I2C Isolators with Enhanced EMC and GPIOs

1 Features

Communication

– ISO1640: Bidirectional Isolated SDA and SCL

communication

– ISO1641: Bidirectional Isolated SDA and

unidirectional SCL communication

– ISO1644: Bidirectional Isolated SDA and SCL

communication with 3 Unidirectional GPIO

channels

– Hot-Swappable SDA and SCL

• Bidirectional data transfer up to 1.7 MHz Operation

• Up to 3 additional unidirectional isolation channels

supporting speeds up to 50 Mbps operation

• Robust isolation barrier with enhanced EMC:

voltage (DW-16)

– Up to 10 kV reinforced surge capability

– ±100 kV/μs typical CMTI

– ±8 kV IEC-ESD 61000-4-2 contact discharge

protection across isolation barrier

– Same side ±8 kV IEC-ESD unpowered contact

discharge on SCL2 and SDA2 (Side 2)

• Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to

5.5 V (Side 2)

• Open-Drain Outputs With 3.5-mA (Side 1) and 50-

mA (Side 2) Sink Current Capability

• Max capacitive load: 80 pF (Side 1) and 400 pF

(Side 2)

• 16-SOIC (DW-16) and 8-SOIC (D-8) Package

Options

• –40°C to +125°C Operating Temperature

• Safety-Related Certifications (planned):

– UL 1577 Component Recognition Program

– DIN VDE V 0884-11

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

GB4943.1-2011 certifications

2 Applications

• SMBus and PMBus Interfaces

• Power Over Ethernet (PoE)

• Motor Control Systems

• Battery Management

.

3 Description

The ISO1644, ISO1640 and ISO1641 (ISO164x)

devices are hot swappable, low-power, bidirectional

The ISO164x supports UL 1577 isolation ratings of

this low emissions device has a logic input and

open drain output separated by a double capacitive

intregrates 3 unidirectional CMOS isolation channels

which can be used for static GPIO isolation or to

isolate a Serial Peripheral Interface (SPI) bus. This

family includes basic and reinforced insulation devices

certified by VDE, UL, CSA, TUV and CQC. The

ISO1644 and ISO1640 has two isolated bidirectional

channels for clock and data lines while the ISO1641

has a bidirectional data and a unidirectional clock

channel. The ISO164x family integrates logic required

to support bidirectional channels, providing a much

simpler design and smaller footprint when compared

to optocoupler-based solutions.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

ISO1640BD

ISO1641BD

SOIC (8)

4.90 mm × 3.91 mm

ISO1640DW

ISO1644DW

SOIC (16)

10.30 mm × 7.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Isolation Options

PART NUMBER

ISO164xBD

ISO164xDW

Protection Level

Basic

Reinforced

Surge Test Voltage

Isolation Rating

Working Voltage

VCC2

VCC1

SDA2

or SCL2

SDA1

or SCL1

GND1

GND2

Simplified Isolated Bidirectional Data Channel

Schematic

ISO1640, ISO1641, ISO1644

SLLSFC2C – MAY 2021 – REVISED JUNE 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.