ICS8743008I Datasheet, PDF (9/28 Pages) Integrated Device Technology – FEMTOCLOCKS™ LVDS/LVPECL ZERO DELAY BUFFER/CLOCK GENERATOR FOR PCI EXPRESS™ AND ETHERNET

ICS8743008I
FEMTOCLOCKS™ LVDS/LVPECL ZERO DELAY BUFFER/CLOCK GENERATOR
PRELIMINARY
Table 4G. LVPECL DC Characteristics, V_DD = V_DDO = 3.3V ± 5%, V_EE = 0V, T_A = -40°C to 85°C
Symbol Parameter
Test Conditions
Minimum Typical
V_OH
V_OL
V_SWING
Output High Current; NOTE 1
Output Low Current; NOTE 1
Peak-to-Peak Output Voltage Swing
V_DDO – 1.4
V_DDO – 2.0
0.6
NOTE 1: Outputs termination with 50Ω to V_DDO – 2V.
Maximum
V_DDO – 0.9
V_DDO – 1.7
1.0
Units
µA
µA
V
AC Electrical Characteristics
Table 5A. LVDS AC Characteristics, V_DD = V_DDO = 3.3V ± 5%, T_A = -40°C to 85°C
Parameter
Symbol
Test Conditions
Minimum Typical
f_MAX
tjit(cc)
Output Frequency
Cycle-to-Cycle Jitter; NOTE 1
98
25
tsk(o)
Output Skew; NOTE 2
60
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 3
125MHz, Integration Range:
1.875MHz – 20MHz
100MHz, Integration Range:
1.875MHz – 20MHz
0.60
0.66
t_j
Phase Jitter Peak-to-Peak;
NOTE 4
125MHz, (1.2MHz – 21.9MHz),
10⁶ samples
13.49
t_{REFCLK_HF_RMS}
t_R / t_F
odc
Phase Jitter RMS; NOTE 5
Output Rise/Fall Time
Output Duty Cycle
125MHz
20% to 80%
1.29
600
50
Maximum
160
Units
MHz
ps
ps
ps
ps
ps
ps
ps
%
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the differential cross points.
NOTE 3: Please refer to the Phase Noise plots.
NOTE 4: RMS jitter after applying system transfer function. See IDT Application Note PCI Express Reference Clock Requirements.
Maximum limit for PCI Express is 86ps peak-to-peak.
NOTE 5: RMS jitter after applying system transfer function. The pole frequencies for H1 and H2 for PCIe Gen 2 are 8-16MHz and
5-16MHz. See IDT Application Note PCI Express Reference Clock Requirements. Maximum limit for PCI Express Generation 2 is 3.1ps
rms.
IDT™ / ICS™ LVDS/LVPECL ZERO DELAY BUFFER/CLOCK GENERATOR 9
ICS8743008DKI REV. A AUGUST 25, 2008