557GI-05A ICST [Integrated Circuit Systems], 557GI-05A Datasheet - Page 3

• Manufacturer Part Number: 557GI-05A
• Description: Quad Differential PCI-Express Clock Source
• Manufacturer: ICST [Integrated Circuit Systems]

MDS 557-05A E
Pin Descriptions
Integrated Circuit Systems, Inc.
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
VDDODA
VDDXD
Name
CLKD
CLKD
CLKC
CLKC
CLKB
CLKB
CLKA
CLKA
GND
IREF
GND
Pin
OE
PD
S0
S1
S2
X1
X2
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Pin
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525 Race Street, San Jose, CA 95126
Connect to +3.3 V digital supply.
Spread spectrum select pin #0. See table above. Internal pull-up resistor.
Spread spectrum select pin #1. See table above Internal pull-up resistor.
Spread spectrum select pin #2. See table above. Internal pull-up resistor.
Crystal connection. Connect to a fundamental mode crystal or clock input.
Crystal connection. Connect to a fundamental mode crystal or leave open.
Powers down all PLL’s and tri-states outputs when low. Internal pull-up resistor.
Provides output on, tri-states output (High = enable outputs; Low = disable outputs).
Internal pull-up resistor.
Connect to digital ground.
Precision resistor attached to this pin is connected to the internal current reference.
Selectable 100/200 MHz spread spectrum differential Compliment output clock D.
Selectable 100/200 MHz spread spectrum differential True output clock D.
Selectable 100/200 MHz spread spectrum differential Compliment output clock C.
Selectable 100/200 MHz spread spectrum differential True output clock C.
Connect to +3.3 V analog supply.
Connect to analog ground.
Selectable 100/200 MHz spread spectrum differential Compliment output clock B.
Selectable 100/200 MHz spread spectrum differential True output clock B.
Selectable 100/200 MHz spread spectrum differential Compliment output clock A.
Selectable 100/200 MHz spread spectrum differential True output clock A.
3
Pin Description
Quad Differential PCI-Express Clock Source
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www.icst.com
Revision 011606
ICS557-05A