ICS9DB106 Datasheet, PDF (2/9 Pages) Integrated Circuit Systems – 6 Output PCI Express Buffer with CLKREQ Function

Integrated
Circuit
Systems, Inc.
ICS9DB106
Preliminary Product Preview
Pin Description
PIN
PIN NAME
PIN TYPE
#
DESCRIPTION
1 PLL_BW
3.3V input for selecting PLL Band Width
IN
0 = low, 1= high
2 CLK_INT
IN
"True" reference clock input.
3 CLK_INC
IN
"Complimentary" reference clock input.
4 **CLKREQ1#
Output enable for PCI Express output pair '1'
IN
0 = enabled, 1 = tri-stated
5 PCIEXT0
OUT
True clock of differential PCI_Express pair.
6 PCIEXC0
OUT
Complement clock of differential PCI_Express pair.
7 VDD
PWR
Power supply, nominal 3.3V
8 GND
IN
Ground pin.
9 PCIEXT1
OUT
True clock of differential PCI_Express pair.
10 PCIEXC1
OUT
Complement clock of differential PCI_Express pair.
11 PCIEXT2
OUT
True clock of differential PCI_Express pair.
12 PCIEXC2
OUT
Complement clock of differential PCI_Express pair.
13 VDD
PWR
Power supply, nominal 3.3V
14 SMBDAT
I/O
Data pin of SMBUS circuitry, 5V tolerant
15 SMBCLK
IN
Clock pin of SMBUS circuitry, 5V tolerant
16 VDD
PWR
Power supply, nominal 3.3V
17 PCIEXC3
OUT
Complement clock of differential PCI_Express pair.
18 PCIEXT3
OUT
True clock of differential PCI_Express pair.
19 PCIEXC4
OUT
Complement clock of differential PCI_Express pair.
20 PCIEXT4
OUT
True clock of differential PCI_Express pair.
21 GND
PWR
Ground pin.
22 VDD
PWR
Power supply, nominal 3.3V
23 PCIEXC5
OUT
Complement clock of differential PCI_Express pair.
24 PCIEXT5
OUT
True clock of differential PCI_Express pair.
25 **CLKREQ4#
IN
Output enable for PCI Express output pair '4'
0 = enabled, 1 = tri-stated
This pin establishes the reference current for the differential current-
26 IREF
OUT
mode output pairs. This pin requires a fixed precision resistor tied
to ground in order to establish the appropriate current. 475 ohms is
the standard value.
27 GNDA
PWR
Ground pin for the PLL core.
28 VDDA
PWR
3.3V power for the PLL core.
Note:
Pins preceeded by '**' have internal 120K ohm pull down resistors
0833A—07/26/04
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