ics557-05a Integrated Device Technology, ics557-05a Datasheet - Page 3

• Manufacturer Part Number: ics557-05a
• Description: Quad Differential Pci-express Clock Source
• Manufacturer: Integrated Device Technology

Pin Descriptions
IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
ICS557-05A
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
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
PD
OE
S0
S1
S2
X1
X2
Output Crystal connection. Connect to a fundamental mode crystal or leave open.
Output Precision resistor attached to this pin is connected to the internal current reference.
Output Selectable 100/200 MHz spread spectrum differential Compliment output clock D.
Output Selectable 100/200 MHz spread spectrum differential True output clock D.
Output Selectable 100/200 MHz spread spectrum differential Compliment output clock C.
Output Selectable 100/200 MHz spread spectrum differential True output clock C.
Output Selectable 100/200 MHz spread spectrum differential Compliment output clock B.
Output Selectable 100/200 MHz spread spectrum differential True output clock B.
Output Selectable 100/200 MHz spread spectrum differential Compliment output clock A.
Output Selectable 100/200 MHz spread spectrum differential True output clock A.
Power
Power
Power
Power
Input
Input
Input
Input
Input
Input
Type
Pin
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.
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.
Connect to analog ground.
Connect to +3.3 V analog supply.
3
Pin Description
ICS557-05A
PCIE SSCG
REV H 092407