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ICS557M-01LF Datasheet

PCI-EXPRESS GEN1 CLOCK SOURCE

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PCI-EXPRESS GEN1 CLOCK SOURCE
DATASHEET
ICS557-01
Description
The ICS557-01 is a clock chip designed for use in
PCI-Express Cards as a clock source. It provides a pair of
differential outputs at 100 MHz in a small 8-pin SOIC
package.
Using IDT’s patented Phase-Locked Loop (PLL)
techniques, the device takes a 25 MHz crystal input and
produces HCSL (Host Clock Signal Level) differential
outputs at 100 MHz clock frequency. LVDS signal levels can
also be supported via an alternative termination scheme.
Features
Supports PCI-ExpressTM HCSL Outputs
0.7 V current mode differential pair
Supports LVDS Output Levels
Packaged in 8-pin SOIC
RoHS 5 (green) or RoHS 6 (green and lead free)
compliant packaging
Operating voltage of 3.3 V
Low power consumption
Input frequency of 25 MHz
Short term jitter 100 ps (peak-to-peak)
Output Enable via pin selection
Industrial temperature range available
For PCIe Gen2 applications, see the 5V41064
For PCIe Gen3 applications, see the 5V41234
Block Diagram
VDD
X1
25 MHz
crystal /clock
X2
Clock
Buffer/
Crystal
Oscillator
Phase Lock
Loop
Crystal Tuning Capacitors
GND
OE
CLK
CLK
RR(IREF)
IDT® PCI-EXPRESS GEN1 CLOCK SOURCE
1
ICS557-01 REV P 072512


Renesas Electronics Components Datasheet

ICS557M-01LF Datasheet

PCI-EXPRESS GEN1 CLOCK SOURCE

No Preview Available !

ICS557-01
PCI-EXPRESS GEN1 CLOCK SOURCE
Pin Assignment
OE
1
X1
2
X2
3
GND 4
8 VDD
7 CLK
6 CLK
5 IREF
8 Pin (150 mil) SOIC
PCIE
Pin Descriptions
Pin
Number
1
Pin
Name
OE
2
X1
3
X2
4
GND
5
IREF
6
CLK
7
CLK
8
VDD
Pin
Type
Pin Description
Input Output Enable signal
(H = outputs are enabled, L = outputs are disabled/tristated).
Internal pull-up resistor.
Input Crystal or clock input. Connect to a 25 MHz crystal or single ended clock.
XO Crystal Connection. Connect to a parallel mode crystal.
Leave floating if clock input.
Power Connect to ground.
Output A 475Ω precision resistor connected between this pin and ground
establishes the external reference current.
Output HCSL differential complementary clock output.
Output HCSL differential clock output.
Power Connect to +3.3 V.
IDT® PCI-EXPRESS GEN1 CLOCK SOURCE
2
ICS557-01 REV P 072512


Part Number ICS557M-01LF
Description PCI-EXPRESS GEN1 CLOCK SOURCE
Maker Renesas
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ICS557M-01LF Datasheet PDF






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