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

1 Features

Communication

– ISO1640: Bidirectional Isolated SDA and SCL

communication

– ISO1641: Bidirectional SDA and unidirectional

SCL communcation

– Hot Swappable SDA and SCL

• Bidirectional data transfer up to 1.7 MHz 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 ISO1640 and ISO1641 (ISO164x) devices are

hot swappable, low-power, bidirectional isolators that

package. Each isolation channel in this low emissions

device has a logic input and open drain output

separated by a double capacitive silicon dioxide

and reinforced insulation ratings devices certified by

VDE, UL, CSA, TUV and CQC. The 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

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

SLLSFC2B – FEBRUARY 2020 – REVISED MAY 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.