HCPL-0721 查看數據表（PDF） - HP => Agilent Technologies

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HCPL-0721

40 ns Propagation Delay, CMOS Optocoupler

HP => Agilent Technologies 

Insulation and Safety Related Specifications

Value

Parameter

Symbol 772X 072X

Minimum External Air

Gap (Clearance)

L(I01) 7.1

4.9

Minimum External

Tracking (Creepage)

L(I02) 7.4

4.8

Minimum Internal Plastic

Gap (Internal Clearance)

0.08 0.08

Tracking Resistance

CTI

≥175 ≥175

(Comparative Tracking

Index)

Isolation Group

IIIa

IIIa

Units

mm

mm

mm

Volts

Conditions

Measured from input terminals to output

terminals, shortest distance through air.

Measured from input terminals to output

terminals, shortest distance path along body.

Insulation thickness between emitter and

detector; also known as distance through

insulation.

DIN IEC 112/VDE 0303 Part 1

Material Group (DIN VDE 0110, 1/89,

Table 1)

All Agilent data sheets report the

creepage and clearance inherent

to the optocoupler component

itself. These dimensions are

needed as a starting point for the

equipment designer when

determining the circuit insulation

requirements. However, once

mounted on a printed circuit

board, minimum creepage and

clearance requirements must be

met as specified for individual

equipment standards. For

creepage, the shortest distance

path along the surface of a

printed circuit board between the

solder fillets of the input and

output leads must be considered.

There are recommended

techniques such as grooves and

ribs which may be used on a

printed circuit board to achieve

desired creepage and clearances.

Creepage and clearance distances

will also change depending on

factors such as pollution degree

and insulation level.

5

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