ICS557-05A Datasheet, PDF (9/12 Pages) Integrated Circuit Systems – Quad Differential PCI-Express Clock Source

ICS557-05A
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
PCIE SSCG
AC Electrical Characteristics - CLKOUTA/CLKOUTB
Unless stated otherwise, VDD=3.3 V ±5%, 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
Modulation Frequency
Rise Time^1,2
Fall Time^1,2
Skew between outputs
Duty Cycle^1,3
Output Enable Time⁵
Output Disable Time⁵
Power-up Time
Spread Change Time
Symbo
l
Conditions
HCSL termination
LVDS termination
V_OH
V_OL
Absolute
Variation over all edges
Spread spectrum
t_OR From 0.175 V to 0.525 V
t_OF From 0.525 V to 0.175 V
At crossing point Voltage
All outputs
All outputs
t_STABLE From power-up VDD=3.3 V
t_SPREAD Settling period after spread change
Min. Typ. Max. Units
25
660
700
-150
0
250
350
MHz
200 MHz
100 MHz
850
mV
27
mV
550
mV
140
mV
80
ps
30
31.5
33
kHz
175
332
700
ps
175
344
700
ps
50
ps
45
55
%
10
us
10
us
3.0
ms
3.0
ms
1 _{Test setup is RL=50 ohms with 2 pF, Rr = 475Ω (1%).}
2 _{Measurement taken from a single-ended waveform.}
3 _{Measurement taken from a differential waveform.}
4 _{Measured at the crossing point where instantaneous voltages of both CLKOUT and CLKOUT are equal.}
5 _{CLKOUT pins are tri-stated when OE is asserted low. CLKOUT is driven differential when OE is high unless its}
PD= low.
Thermal Characteristics
Parameter
Symbol Conditions
Thermal Resistance Junction to
Ambient
θ_JA Still air
θ_JA 1 m/s air flow
θ_JA 3 m/s air flow
Thermal Resistance Junction to Case θ_JC
Min.
Typ.
93
78
65
20
Max. Units
° C/W
° C/W
° C/W
° C/W
IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
9
ICS557-05A REV H 092407