ICS525-01R Просмотр технического описания (PDF) - Integrated Circuit Systems

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ICS525-01R

User Configurable Clock

Integrated Circuit Systems 

ICS525-01/02/11/12

User Configurable Clock

Pin Assignment

R5

1

R6

2

S0

3

S1

4

S2

5

VDD

6

X1/ICLK

7

X2

8

GND

9

V0

10

V1

11

V2

12

V3

13

V4

14

28

R4

27

R3

26

R2

25

R1

24

R0

23

VDD

22

REF

21

CLK

20

GND

19

PD

18

V8

17

V7

16

V6

15

V5

ICS525-01/-02/-11/-12

Pin Descriptions

Pin

Number

1, 2,

24-28

3, 4, 5

6, 23

7

8

9, 20

10 - 18

Pin

Name

R5, R6,

R0-R4

S0, S1, S2

VDD

X1/ICLK

X2

GND

V0 - V8

19

PD

21

CLK

22

REF

Pin

Type

I(PU)

I(PU)

Power

X1

X2

Power

I(PU)

Input

Output

Output

Pin Description

Reference divider word input pins determined by user. Forms a binary number from 0

to 127.

Select pins for output divider determined by user. See table on page 3

Connect to VDD.

Crystal connection. Connect to a parallel resonant fundamental crystal or input clock.

Crystal connection. Connect to a crystal or leave unconnected for clock.

Connect to ground.

VCO divider word input pins determined by user. Forms a binary number from 0 to

511.

Power-down. Active low. Turns off entire chip when low. Clock outputs stop low.

Output clock determined by status of R0-R6, V-V8, S0-S2, and input frequency.

Reference output. Buffered crystal oscillator (or clock ) output.

KEY: I(PU) = Input with internal pull-up resistor; X1, X2 = crystal connections

MDS 525-01/02/11/12 Q

2

Revision 101105

Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

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