ICS845204 Datasheet, PDF (5/13 Pages) Integrated Device Technology – CRYSTAL-TO-MLVDS PCI EXPRESS™ CLOCK SYNTHESIZER W/SPREAD SPECTRUM

ICS845204
CRYSTAL-TO-MLVDS CLOCK SYNTHESIZER W/SPREAD SPECTRUM
ADVANCE INFORMATION
AC Electrical Characteristics
Table 6. AC Characteristics, V_DD = V_DDO = 3.3V ± 5%, T_A = 0°C to 70°
Parameter Symbol
Test Conditions
f_OUT
Output Frequency
tjit(per)
Period Jitter, Random
tjit(cc)
Cycle-to-Cycle Jitter;
NOTE 1, 2
tsk(o)
F_XTAL
F_M
F_MF
SSC_RED
t_STABLE
t_R / t_F
odc
Output Skew; NOTE 2, 3
Crystal Input Range: NOTE 1
SSC Modulation Frequency;
NOTE 4
SSC Modulation Factor;
NOTE 4
Spectral Reduction
Power-up Stable Clock
Output
Output Rise/Fall Time
Output Duty Cycle
25MHz,
Integration Range: 12kHz – 20MHz
100MHz,
Integration Range: 12kHz – 20MHz
125MHz,
Integration Range: 12kHz – 20MHz
250MHz,
Integration Range: 12kHz – 20MHz
25MHz
100MHz
125MHz
250MHz
20% to 80%
Minimum
Typical
25
100
125
Maximum
Units
MHz
MHz
MHz
TBD
ps
TBD
ps
TBD
ps
TBD
TBD
25
TBD
ps
50
ps
50
ps
50
ps
50
ps
ps
MHz
kHz
TBD
%
TBD
dB
10
ms
TBD
ps
50
%
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 2: Only valid within the VCO operating range.
NOTE 3: Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the output differential cross points.
NOTE 4: Spread Spectrum clocking enabled.
IDT™ / ICS™ M-LVDS CLOCK SYNTHESIZER
5
ICS845204AK SEPTEMBER 25, 2007