ICS674-01

User Configurable Divider

MDS 674-01 A

2

Revision 033199

Printed 11/15/00

Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 •(408)295-9800tel•(408)295-9818fax

PRELIMINARY INFORMATION

Pin Assignment

Key:

I(PU) = Input with internal pull-up resistor; I=Input (no pull-up); O = Output;

P = Power supply connection

1

8

9

2

3

4

5

6

7

10

11

12

13

14

16

15

20

17

18

19

25

24

23

22

21

26

27

28

B2

INB

VDD

INA

GND

B4

VDD

OUTA

GND

A2

A4

B8

OUTB

A3

A1

B6

B5

GND

A0

Pin #

Name

Type Description

1, 2, 24-28

A5, A6, A0-A4

I(PU) Divider A word input pins. Forms a binary number from 3 to 129.

3, 4, 5

S0, S1, S2

I(PU) Select pins for Post Divider. See table above.

6, 23

VDD

P

Connect to VDD.

7

INA

I

Divider A input.

8

INB

I

Divider B input.

9, 19, 20

GND

P

Connect to ground.

10-18

B0-B8

I(PU) Divider B word input pins. Forms a binary number from 12 to 519.

21

OUTB

O

Divider B output.

22

OUTA

O

Divider A output.

A5

A6

B0

B3

B1

S2

S0

S1

B7

S2

S1

S0

Post

pin 5

pin 4

pin 3

Divide

000

10

001

2

010

8

011

4

100

5

101

7

110

1

111

6

Post Divider Table

Pin Description

External Components

The ICS674-01 requires a 0.01µF decoupling capacitor to be connected between VDD and GND. It

must be connected close to the ICS674-01 to minimize lead inductance. Terminating resistors of 33

Ω can

be used in series with the OUTA and OUTB pins.