ICS557-01
PCI-E
XPRESS
C
LOCK
S
OURCE
AC Electrical Characteristics - CLK/CLK
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
Crossing Point
Voltage
1,2
Crossing Point
Voltage
1,2,4
Jitter, Cycle-to-Cycle
1,3
Rise Time
1,2
Fall Time
1,2
Rise/Fall Time
Variation
1,2
Duty Cycle
1,3
Output Enable Time
5
Output Disable Time
5
Stabilization Time
Spread Change Time
1
2
3
4
5
1,2
Symbol
Conditions
Min.
Typ.
25
100
Max.
Units
MHz
MHz
V
OH
V
OL
Absolute
Variation over all edges
660
-150
250
700
0
350
850
550
140
mV
mV
mV
mV
ps
100
t
OR
t
OF
from 0.175 V to 0.525 V
from 0.525 V to 0.175 V
175
175
332
344
700
700
125
45
All outputs
All outputs
t
STABLE
From power-up VDD=3.3 V
t
SPREAD
Settling period after spread change
30
30
3.0
3.0
55
ps
ps
ps
%
µs
µs
ms
ms
Test setup is R
L
=50 ohms with 2 pF, R
R
= 475Ω (1%).
Measurement taken from a single-ended waveform.
Measurement taken from a differential waveform.
Measured at the crossing point where instantaneous voltages of both CLKOUT and CLKOUT are equal.
CLKOUT pins are tri-stated when OE is low asserted. CLKOUT is driven differential when OE is high.
Thermal Characteristics
(8-pin SOIC)
Parameter
Thermal Resistance Junction to
Ambient
Symbol
θ
JA
θ
JA
θ
JA
θ
JC
Conditions
Still air
1 m/s air flow
3 m/s air flow
Min.
Typ.
150
140
120
40
Max. Units
°C/W
°C/W
°C/W
°C/W
Thermal Resistance Junction to Case
MDS 557-01 F
In te grated Circuit Systems
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