ISO7420E, ISO7420FE, ISO7421E, ISO7421FE

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SLLSE45F – DECEMBER 2010 – REVISED JULY 2015

8.3 Feature Description

ISO742x are available in multiple channel configurations and default output state options to enable wide variety

of application uses.

PRODUCT

DATA RATE

DEFAULT OUTPUT

RATED TA

CHANNEL DIRECTION

ISO7420E

High

Same

ISO7420FE

Low

50 Mbps

–40°C to 125°C

ISO7421E

High

Opposite

ISO7421FE

Low

8.3.1 Insulation and Safety-Related Specifications for D-8 Package

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

L(I01)

Minimum air gap (clearance)

Shortest terminal-to-terminal distance through air

4

mm

Minimum external tracking

Shortest terminal-to-terminal distance across the

L(I02)

4

mm

(creepage)

package surface

Tracking resistance (comparative

CTI

DIN EN 60112 (VDE 0303-11); IEC 60112

>400

V

tracking index)

Minimum internal gap (internal

Distance through the insulation

0.014

mm

clearance)

VIO = 500 V, TA = 25°C

>1012

Ω

Isolation resistance, input to

RIO

output(1)

VIO = 500 V, 100°C ≤ TA ≤ max

>1011

Ω

Barrier capacitance, input to

CIO

VIO = 0.4 sin (2πft), f = 1 MHz

1

pF

output(1)

CI

Input capacitance(2)

VI = VCC/2 + 0.4 sin (2πft), f = 1 MHz, VCC = 5 V

1

pF

(1)

All pins on each side of the barrier tied together creating a two-terminal device.

(2)

Measured from input pin to ground.

NOTE

Creepage and clearance requirements should be applied according to the specific

equipment isolation standards of an application. Care should be taken to maintain the

creepage and clearance distance of a board design to ensure that the mounting pads of

the isolator on the printed-circuit board do not reduce this distance.

Creepage and clearance on a printed-circuit board become equal in certain cases.

Techniques such as inserting grooves and/or ribs on a printed circuit board are used to

help increase these specifications.

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Product Folder Links: ISO7420E ISO7420FE ISO7421E ISO7421FE