www.ti.com

APPLICATION INFORMATION

MANUFACTURER CROSS-REFERENCE DATA

1

2

3

4

8

7

6

5

V

I

GND1

EN

GND2

NC

V

O

GND2

IL710

HCPL-xxxx

1

1

1

2

2

2

3

3

3

4

4

4

8

8

8

7

7

7

6

6

6

5

5

5

V

CC1

V

DD1

V

DD1

V

DD1

NC

IN

V

I

V

I

V

CC1

V

DD1

*

GND1

GND1

GND1

V

CC2

V

DD2

V

DD2

V

DD2

V

OE

OUT

V

O

V

O

GND2

GND2

GND2

ISO722

or

ISO722M

ADuM1100

GND2

1

2

3

4

8

7

6

5

V

CC1

IN

V

CC1

GND1

V

CC2

OUT

GND2

ISO721

or

ISO721M

V

CC1

INPUT

IN

3

6

OUT

OUTPUT

GND2

GND1

0.1

F

m

0.001

F

m

0.001

F

m

ISO721

or ISO721M

0.1

F

m

V

CC2

1

8

4

5

2

7

ISO721, ISO721M

ISO722, ISO722M

SLLS629B – JANUARY 2006 – REVISED MAY 2006

The ISO72xx isolators have the same functional pin-out as most other vendors, and they are often pin-for-pin

drop-in replacements. The notable differences in the products are propagation delay, signaling rate, power

consumption, and transient protection rating. Table 1 is used as a guide for replacing other isolators with the

ISO72x family of single channel isolators.

Figure 17. Pin Cross Reference

Table 1. CROSS REFERENCE

PIN 7

ISO721

ISO722

ISOLATOR

PIN 1

PIN 2

PIN 3

PIN 4

PIN 5

PIN 6

PIN 8

OR

OR

ISO721M

ISO722M

IN

GND1

GND2

OUT

GND2

EN

GND1

GND2

GND2

*Leave

HCPL-xxxx

GND1

GND2

IL710

GND1

GND2

(1)

(2)

The ISO721 and ISO721M pin 5 and pin 7 are internally connected together. Either or both may be used as GND2.

(3)

may be left an open circuit as well.

(4)

An HCPL device PIN 7 must be left floating (open) or grounded when an ISO722 or ISO722M device is to be used as a drop-in

replacement. If pin 7 of the ISO722 or ISO722M device is placed in a high logic state, the output of the device is disabled

(5)

Figure 18. Basic Application Circuit

16

Submit Documentation Feedback