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ICS650GI-44T

P1-P3P4-P6P7-P9P10-P11
ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER CLOCK SYNTHESIZER
IDT™ / ICS™
SPREAD SPECTRUM CLOCK SYNTHESIZER 4
ICS650-44 REV D 102709
1) The 0.01µF decoupling capacitors should be mounted on
the component side of the board as close to the VDD pin as
possible. No vias should be used between the decoupling
capacitors and VDD pins. The PCB trace to VDD pins
should be kept as short as possible, as should the PCB
trace to the ground via.
2) The external crystal should be mounted just next to the
device with short traces. The X1 and X2 traces should not
be routed next to each other with minimum spaces, instead
they should be separated and away from other traces.
3) To minimize EMI, the 33Ω series termination resistor
should be placed close to the clock output.
4) An optimum layout is one with all components on the
same side of the board, minimizing vias through other signal
layers. Other signal traces should be routed away from the
ICS650-44. This includes signal traces just underneath the
device, or on layers adjacent to the ground plane layer used
by the device.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS650-44. These ratings, which are
standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these
or any other conditions above those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Recommended Operation Conditions
Item Rating
Supply Voltage, VDD 5 V
All Inputs and Outputs -0.5 V to VDD+0.5 V
Ambient Operating Temperature -40 to +85° C
Storage Temperature -65 to +150° C
Junction Temperature 125° C
Soldering Temperature (max. of 10 seconds) 260° C
Parameter Min. Typ. Max. Units
Ambient Operating Temperature -40 – +85 ° C
Power Supply Voltage (VDD, with respect to GND) +3.135 +3.3 +3.465 V
Power Supply Voltage (VDDO) +2.375 +2.5 +2.625 V
Power Supply Ramp Time, Figure 4 4 ms
ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER CLOCK SYNTHESIZER
IDT™ / ICS™
SPREAD SPECTRUM CLOCK SYNTHESIZER 5
ICS650-44 REV D 102709
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, VDDO = 2.5 V ±5% , Ambient Temperature -40 to +85° C
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Supply Current
IDD
no load 27 mA
PDTS
= 0, no load 40 uA
IDDO
no load 4 mA
PDTS
= 0, no load 1 uA
Input High Voltage V
IH
FS3:0, PDTS 2V
Input Low Voltage V
IL
FS3:0, PDTS 0.8 V
Input High Voltage V
IH
X1/CLKIN 0.7 x
VDD
V
Input Low Voltage V
IL
X1/CLKIN 0.3 x
VDD
V
Output High Voltage V
OH
I
OH
= -4 mA 1.8 V
Output Low Voltage V
OL
I
OL
= 4 mA 0.6 V
Short Circuit Current I
OS
±50 mA
Nominal Output
Impedance
Z
O
20 Ω
Internal Pull-up Resistor R
PU
FS3:0, PDTS 360 kΩ
Input Leakage Current I
I
FS3:0, PDTS, VIN=VDD 1 uA
Internal Pull-down
Resistor
R
PD
CLK outputs 900 kΩ
Input Capacitance C
IN
Inputs 4 pF
ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER CLOCK SYNTHESIZER
IDT™ / ICS™
SPREAD SPECTRUM CLOCK SYNTHESIZER 6
ICS650-44 REV D 102709
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, VDDO = 2.5 V ±5%, Ambient Temperature -40 to +85° C
Note 1: Measured with 5 pF load.
Parameter Symbol Conditions Min. Typ. Max. Units
Input Frequency F
IN
Crystal or clock input 25 MHz
Spread Spectrum Modulation
Frequency
50 kHz
Duty Cycle t
2
/t
1
At VDD/2, Note 1 and
Figures 1 and 2
45 50 55 %
Output Fall Time t
3
80% to 20%, Note 1
and Figures 1 & 3
1.5 ns
Output Rise Time t
4
20% to 80%, Note 1
and Figures 1 & 3
1.5 ns
One Sigma Clock Period Jitter Note 1 30 ps
Absolute Jitter, Peak-to-Peak t
ja
Deviation from mean,
Note1 & Figures 1 and
6
±125 ps
Output Enable Time t
EN
PDTS high to PLL
locked to within 1% of
final value, Figure 5
2.5 5 ms
Output Disable Time t
DIS
PDTS low to tri-state,
Figure 5
20 ns
Output-to-Output Skew ±180 ps
Power-up Time
t
P
PLL lock-time from
power-up to 1% of final
value, Figure 4
610ms
P1-P3P4-P6P7-P9P10-P11

ICS650GI-44T

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IC CLK SYNTHESIZER 16-TSSOP
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