ISO7420E, ISO7420FE, ISO7420FCC

ISO7421E, ISO7421FE, ISO7421FCC

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SLLSE45D

– DECEMBER 2010 – REVISED DECEMBER 2011

DEVICE INFORMATION

IEC 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

4.8

mm

Minimum external tracking

Shortest terminal-to-terminal distance across the

L(I02)

4.3

mm

(creepage)

package surface

Tracking resistance (comparative

CTI

DIN IEC 60112 / VDE 0303 Part 1

>400

V

tracking index)

Minimum internal gap (internal

Distance through the insulation

0.014

mm

clearance)

Ω

Isolation resistance, input to

Ω

Barrier capacitance, input to

1

pF

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 according to the

measurement techniques shown in the Isolation Glossary. Techniques such as inserting

grooves and/or ribs on a printed circuit board are used to help increase these

specifications.

INSULATION CHARACTERISTICS

(3)

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

SPECIFICATION

UNIT

Maximum working insulation voltage

566

Method a, After environmental tests subgroup 1,

906

Partial Discharge

< 5 pC

Method b1,

Input-to-output test voltage per IEC

1062

60747-5-2

Partial discharge

< 5 pC

After Input/Output safety test subgroup 2/3,

680

Partial discharge

< 5 pC

Transient overvoltage per IEC 60747-5-2

t = 60 sec (qualification)

4242

t= 1 sec (100% production)

Maximum surge voltage

Tested per IEC 60065 (Qualification Test)

4000

2500

Isolation voltage per UL

3000

Insulation resistance

Ω

Pollution degree

2

(3)

Climatic Classification 40/125/21

Copyright

© 2010–2011, Texas Instruments Incorporated

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