ISO644x-Q1 General-Purpose, Basic and Reinforced, Quad-Channel Digital Isolators

1 Features

• AEC-Q100 qualified with the following results:

– Device temperature Grade 1: –40°C to +125°C

ambient operating temperature range

• Functional Safety-Capable (Planned)

– Documentation available to aid ISO 26262

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

• Supply range: 2.25V to 5.5V

• Overvoltage Tolerant Inputs

• Default output high ( ISO644x-Q1 ) and low

( ISO644xF-Q1 ) 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 RI, ESD, and surge immunity

– Low emissions

• Small Footprint Packages:

– Wide-SSOP (DFP-16) Package

– SSOP (DBQ-16) Package

• Safety-Related Certifications (Planned):

– DIN EN IEC 60747-17 (VDE 0884-17)

– UL 1577 and CSA CAS Notice No. 5A

– IEC 62368-1, IEC 61010-1 and GB 4943.1

certifications

2 Applications

• Hybrid, electric and power train system (EV/HEV)

– Battery management system (BMS)

– On-board charger

– DC/DC converter

– Inverter and motor control

3 Description

The ISO644x-Q1 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, and CQC.

The

ISO644x-Q1

devices

provide

high

EMC

performance while isolating CMOS or LVCMOS digital

I/Os. ISO644x-Q1 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-Q1 and ISO6440F-Q1 devices have all

channels in the forward direction. The ISO6441-Q1

and ISO6441F-Q1 devices have one reverse-direction

channel. The ISO6442-Q1 and ISO6442F-Q1 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.

Package Information

PART NUMBER(1)

PACKAGE

PACKAGE SIZE(2)

ISO6440-Q1 ,

ISO6440F-Q1

ISO6441-Q1 ,

ISO6441F-Q1

ISO6442-Q1 ,

ISO6442F-Q1

Wide-SOIC (DW-16) (3)

10.3mm × 10.3mm

Wide-SSOP (DFP-16) (3)

10.3mm × 4.65mm

SSOP (DBQ-16) (3)

6mm × 4.9mm

(1)

For more information, see Mechanical, Packaging, and

Orderable Information.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

(3)

Please refer to Packaging Information table on the Package

Option Addendum page in the Mechanical, Packaging, and

Orderable Information section for Production or Preproduction

status for specific device and package.

OUTx

GNDO

GNDI

V

CCO

V

CCI

INx

ENx

VCCI=Input supply, VCCO=Output supply

GNDI=Input ground, GNDO=Output ground

Simplified Schematic

ISO6440-Q1, ISO6441-Q1, ISO6442-Q1

SLLSG11 – APRIL 2026

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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.