ICS507-01
PECL CLOCK SYNTHESIZER
PECL MULTIPLIER
IDT / ICS PECL CLOCK SYNTHESIZER
2
ICS507-01
REV I 041905
Pin Assignment
* At 3.3V, use this selection to get 155.52 MHz from a
16 MHz input.
For lowest phase noise generation of 155.52 MHz, use
a 19.44 MHz crystal and the 8X selection.
Clock Multiplier Select Table
0 = connect pin directly to ground
1 = connect pin directly to VDD
M = leave unconnected (floating)
Pin Descriptions
12
1
11
2
10
3
9
X1/ICLK
4
VDD
5
VDD
6
NC
7
S1
8
GND
S0
OE
NC
GND
NC
PECL
NC
RES
16
15
14
13
PECL
X2
16 Pin (150 mil) SOIC
S1
S0
Multiplier
0
9.72X*
0M
10X
01
12X
M
0
6.25X
MM
8X
M1
5X
10
2X
1M
3X
11
4X
Number
Name
Type
Description
1
XI/ICLK
Input
Crystal Connection. Connect to a fundamental parallel mode crystal, or
clock.
2
VDD
Power
Connect to +3.3 V or 5 V, and to VDD on pin 3.
3
VDD
Power
Connect to VDD on pin 2. Decouple with pin 5.
4
S1
Input
Multiplier select pin 1. Determines output frequency per table above.
5
GND
Power
Connect to ground.
6
GND
Power
Connect to ground.
7
NC
No connect. Do not connect this pin to anything.
8
PECL
Output
PECL output. Connect to resistor load as shown on page 1.
9
PECL
Output
Complimentary PECL output. Connect to resistor load as shown on
page 1.
10
RES
Input
Bias resistor input. Connect a resistor between this pin and VDD.
11
NC
No connect. Do not connect this pin to anything.
12
NC
No connect. Do not connect this pin to anything.
13
OE
Input
Output Enable. Tri-states both outputs when low. Internal pull-up.
14
S0
Input
Multiplier select pin 0. Determines output frequency per table above.
15
NC
No connect. Do not connect this pin to anything.
16
X2
Output
Crystal Connection. Connect to crystal, or leave unconnected for clock
input.
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