ICS525-01/02/11/12
USER CONFIGURABLE CLOCK
CLOCK MULTIPLIER
Pin Assignment
R5
R6
S0
S1
S2
VDD
X1/ICLK
X2
GND
V0
V1
V2
V3
V4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
R4
R3
R2
R1
R0
VDD
REF
CLK
GND
PD
V8
V7
V6
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
19
21
22
Pin
Name
R5, R6,
R0-R4
S0, S1, S2
VDD
X1/ICLK
X2
GND
V0 - V8
PD
CLK
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 tri-stated.
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
IDT™ / ICS™
USER CONFIGURABLE CLOCK
2
ICS525-01/02/11/12 REV S 042407
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
