ICS557-03 Datasheet, PDF (7/10 Pages) Integrated Circuit Systems – PCI-EXPRESS CLOCK SOURCE

ICS557-03
PCI-EXPRESS CLOCK SOURCE
PCIE SSCG
AC Electrical Characteristics - CLK0/CLK1, CLK0/CLK1
Unless stated otherwise, VDD=3.3 V ±10%, Ambient Temperature -40 to +85° C
Parameter
Input Frequency
Output Frequency
Output High Voltage^1,2
Output Low Voltage^1,2
Crossing Point Voltage^1,2
Crossing Point Voltage^1,2,4
Jitter, Cycle-to-Cycle^1,3
Frequency Synthesis Error
Modulation Frequency
Rise Time^1,2
Fall Time^1,2
Rise/Fall Time Variation^1,2
Output to Output Skew
Duty Cycle^1,3
Output Enable Time⁵
Output Disable Time⁵
Stabilization Time
Spread Spectrum Transition
Time
Symbol
Conditions
HCSL termination
LVDS termination
V_OH HCSL
V_OL HCSL
Absolute
Variation over all edges
All outputs
Spread spectrum
t_OR From 0.175 V to 0.525 V
t_OF From 0.525 V to 0.175 V
t_STABLE
t_SPREAD
All outputs
All outputs
From power-up VDD=3.3 V
Stabilization time after spread
spectrum changes
Min.
25
25
660
-150
250
30
175
175
45
Typ.
25
700
0
350
80
0
31.5
332
344
10
10
3.0
3.0
Max.
200
100
850
27
550
140
33
700
700
125
50
55
Units
MHz
MHz
MHz
mV
mV
mV
mV
ps
ppm
kHz
ps
ps
ps
ps
%
us
us
ms
ms
Note 1: Test setup is R_L=50 ohms with 2 pF, Rr = 475Ω (1%).
Note 2: Measurement taken from a single-ended waveform.
Note 3: Measurement taken from a differential waveform.
Note 4: Measured at the crossing point where instantaneous voltages of both CLK and CLK are equal.
Note 5: CLK pins are tri-stated when OE is low asserted. CLK is driven differential when OE is high.
IDT™ / ICS™ PCI-EXPRESS CLOCK SOURCE
7
ICS557-03 REV K 102907