ICS9EX21801A Datasheet, PDF (7/14 Pages) Integrated Device Technology – 18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux

ICS9EX21801A
18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux
Datasheet
Electrical Characteristics - Skew and Differential Jitter Parameters
T_A = 0 - 70°C; Supply Voltage V_DD = 3.3 V +/-5%
Group
Parameter
Description
CLK_IN, DIF[x:0]
t_{SPO_PLL100M}
Input-to-Output Skew in PLL mode (1:1 only),
nominal value @ 25°C, 3.3V, 100MHz
CLK_IN, DIF[x:0]
t_{SPO_PLL133M}
Input-to-Output Skew in PLL mode (1:1 only),
nominal value @ 25°C, 3.3V, 133MHz
CLK_IN, DIF[x:0]
t_{PD_BYP}
Input-to-Output Skew in Bypass mode (1:1 only),
nominal value @ 25°C, 3.3V
CLK_IN, DIF [x:0]
∆t_{SPO_PLL}
Input-to-Output Skew Variation in PLL mode
(over specified voltage / temperature operating ranges)
Min TYP Max Units Notes
950 1000 1125 ps 1,2,4,5,8
1100 1125 1175 ps 1,2,4,5,8
4 4.7 5.2 ns 1,2,3,5
|250| |350|
ps
1,2,4,5,6,
10
CLK_IN, DIF [x:0]
∆t_{PD_BYP}
Input-to-Output Skew Variation in Bypass mode
(over specified voltage / temperature operating ranges)
|800| |900|
ps
1,2,3,4,5,
6,10
DIF[17:0]
t_{SKEW_A19}
Output-to-Output Skew across all 18 outputs
(Common to Bypass and PLL mode - all outputs at same gear)
100 150 ps
1,2,3
DIF[17:0]
t_JPH
Differential Phase Jitter (RMS Value)
2 10 ps 1,4,7
DIF[17:0]
t_SSTERROR Differential Spread Spectrum Tracking Error (peak to peak)
20 80 ps 1,4,9
NOTES:
1. Measured into fixed 2 pF load cap. Input to output skew is measured at the first output edge following the corresponding input.
2. Measured from differential cross-point to differential cross-point
3. All Bypass Mode Input-to-Output specs refer to the timing between an input edge and the specific output edge created by it.
4. This parameter is deterministic for a given device
5. Measured with scope averaging on to find mean value.
6. Long-term variation from nominal of input-to-output skew over temperature and voltage for a single device.
7. This parameter is measured at the outputs of two separate ICS9EX21801 devices driven by a single CK410B+. The ICS9EX21801's must be set to high bandwidth.
Differential phase jitter is the accumulation of the phase jitter not shared by the outputs (eg. not including the affects of spread spectrum). Target ranges of consideration are
agents with BW of 1-22Mhz and 11-33Mhz.
8. t is the period of the input clock
9. Differential spread spectrum tracking error is the difference in spread spectrum tracking between two ICS9EX21801 devices This parameter is measured at the outputs of
two separate ICS9EX21801 devices driven by a single CK410B+ in Spread Spectrum mode. The ICS9EX21801's must be set to high bandwidth. The spread spectrum
characteristics are: maximum of 0.5%, 30-33KHz modulation frequency, linear profile.
10. This parameter is an absolute value. It is not a double-sided figure.
IDT^TM 18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux
7
1463B — 01/20/10