ICS9DB202_06 Datasheet, PDF (2/13 Pages) Integrated Device Technology – PCI EXPRESS JITTER ATTENUATOR

ICS9DB202
PCI EXPRESS JITTER ATTENUATOR
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
PLL_BW Input Pullup Selects PLL Bandwidth input. LVCMOS/LVTTL interface levels.
2
CLK
Input Pulldown Non-inverting differential clock input.
3
nCLK
Input
Pullup/
Pulldown
Inverting differential clock input. V_DD/2 default when left floating.
4
FS0
Input Pullup Frequency select pin. LVCMOS/LVTTL interface levels.
5, 9, 12, 16
6, 15
V_DD
GND
Power
Power
Core supply pins.
Power supply ground.
7, 8
10, 11
13, 14
PCIEXT0,
PCIEXC0
nOE0, nOE1
PCIEXC1,
PCIEXT1
Output
Input
Output
Differential output pairs. HCSL interface levels.
Pulldown
Output enable. When HIGH, forces outputs to HiZ state.
When LOW, enables outputs. LVCMOS/LVTTL interface levels.
Differential output pairs. HCSL interface levels.
17
FS1
Input Pulldown Frequency select pin. LVCMOS/LVTTL interface levels.
18
IREF
Input
A fixed precision resistor (475Ω) from this pin to ground provides a
reference current used for differential current-mode PCIEX clock outputs.
19
BYPASS
Power
Pulldown
BYPASS pin. When HIGH. bypass mode, when LOW, PLL mode.
LVCMOS/LVTTL interface levels.
20
V_DDA
Power
Analog supply pin. Requires 24Ω series resistor.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
TABLE 3A. RATIO OF OUTPUT FREQUENCY TO
INPUT FREQUENCY FUNCTION TABLE, FS0
Inputs Outputs
FS0
PCIEX0
0
5/4
1
1
TABLE 3B. RATIO OF OUTPUT FREQUENCY TO
INPUT FREQUENCY FUNCTION TABLE, FS1
Inputs Outputs
FS1
PCIEX1
0
1
1
5/4
TABLE 3C. BYPASS TABLE
Inputs
BYPASS
0
1
Mode
PLL Mode
Bypass Mode
(output = inputs)
TABLE 3D. OUTPUT ENABLE
FUNCTION TABLE, NOE0
Inputs Outputs
nOE0
PCIEX0
0
Enabled
1
HiZ
TABLE 3E. OUTPUT ENABLE
FUNCTION TABLE, NOE1
Inputs Outputs
nOE1
PCIEX1
0
Enabled
1
HiZ
TABLE 3F. PLL BANDWIDTH TABLE
Inputs
Bandwidth
PLL_BW
0
500kHz
1
1MHz
IDT^™ / ICS^™ PCI EXPRESS JITTER ATTENUATOR
2
ICS9DB202CG REV B JULY 14, 2006