ics557-05a Integrated Device Technology, ics557-05a Datasheet - Page 9

• Manufacturer Part Number: ics557-05a
• Description: Quad Differential Pci-express Clock Source
• Manufacturer: Integrated Device Technology

AC Electrical Characteristics - CLKOUTA/CLKOUTB
Unless stated otherwise, VDD=3.3 V ±5%, Ambient Temperature -40 to +85° C
Thermal Characteristics
IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
Input Frequency
Output Frequency
Output High Voltage
Output Low Voltage
Crossing Point
Voltage
Crossing Point
Voltage
Jitter, Cycle-to-Cycle
Modulation Frequency
Rise Time
Fall Time
Skew between outputs
Duty Cycle
Output Enable Time
Output Disable Time
Power-up Time
Spread Change Time
ICS557-05A
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
Parameter
1
2
3
4
5
PD= low.
1,2
1,2,4
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
Test setup is R
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 asserted low. CLKOUT is driven differential when OE is high unless its
1,2
1,2
1,3
1,2
1,2
5
5
1,3
Parameter
L
=50 ohms with 2 pF, Rr = 475Ω (1%).
Symbo
t
t
SPREAD
STABLE
V
V
t
t
OR
OF
OH
OL
l
HCSL termination
LVDS termination
Absolute
Variation over all edges
Spread spectrum
From 0.175 V to 0.525 V
From 0.525 V to 0.175 V
At crossing point Voltage
All outputs
All outputs
From power-up VDD=3.3 V
Settling period after spread change
Symbol
Conditions
θ
θ
θ
θ
JC
JA
JA
JA
Still air
1 m/s air flow
3 m/s air flow
9
Conditions
Min.
-150
660
250
175
175
30
45
Min.
Typ.
31.5
700
350
332
344
3.0
3.0
25
0
Typ.
78
65
20
93
Max.
200
100
850
550
140
700
700
ICS557-05A
27
80
33
50
55
10
10
Max. Units
Units
° C/W
° C/W
° C/W
° C/W
MHz
MHz
MHz
kHz
mV
mV
mV
mV
ms
ms
ps
ps
ps
ps
us
us
%
PCIE SSCG
REV H 092407