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PDF ICS853111-02 Data sheet ( Hoja de datos )

Número de pieza ICS853111-02
Descripción LVPECL/ECL FANOUT BUFFER
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Integrated
Circuit
Systems, Inc.
ICS853111-02
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS853111-02 is a low skew, high per-
ICS formance 1 - t o - 10 Differential-to-2.5V/3.3V
HiPerClockS™ LVPECL/ECL Fanout Buffer and a member
of the HiPerClockS™family of High Perfor-
mance Clock Solutions from ICS. The
ICS853111-02 is characterized to operate from either
a 2.5V or a 3.3V power supply. Guaranteed output and
part-to-part skew characteristics make the ICS853111-
02 ideal for those clock distribution applications de-
manding well defined perfor mance and repeatability.
FEATURES
Ten differential 2.5V/3.3V LVPECL / ECL outputs
Two selectable differential input pairs
PCLKx, nPCLKx pairs can accept the following
differential input levels: LVPECL, LVDS, CML, SSTL
Maximum output frequency: 3.2GHz
Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nPCLK input
Output skew: 25ps (typical)
Part-to-part skew: 85ps (typical)
Propagation delay: 680ps (typical)
Jitter, RMS: < 0.03ps (typical)
LVPECL mode operating voltage supply range:
V = 2.375V to 3.8V, V = 0V
CC EE
ECL mode operating voltage supply range:
VCC = 0V, VEE = -3.8V to -2.375V
-40°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS-compliant
packages
BLOCK DIAGRAM
PCLK0
nPCLK0
PCLK1
nPCLK1
0
1
CLK_SEL
VBB
PIN ASSIGNMENT
Q0
nQ0
Q1
nQ1
24 23 22 21 20 19 18 17
Q2
nQ2
VCCO
nQ2
25
26
1 6 VCCO
15 Q7
Q2 27
14 nQ7
Q3
nQ3 nQ1 28 ICS853111-02 13 Q8
Q1 29
12 nQ8
Q4
nQ4
nQ0 30
11 Q9
Q0 31
10 nQ9
Q5
nQ5
VCCO 3 2
9 VCCO
Q6
nQ6
123456 78
Q7
nQ7
Q8 32-Lead TQFP
nQ8 7mm x 7mm x 1.0mm package body
Q9 Y Package
nQ9 Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
853111AY-02
www.icst.com/products/hiperclocks.html
REV. A JANUARY 10, 2006
1

1 page




ICS853111-02 pdf
Integrated
Circuit
Systems, Inc.
ICS853111-02
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
TABLE 5. AC CHARACTERISTICS, VCC = 0V; VEE = -3.8V TO -2.375V OR VCC = 2.375 TO 3.8V; VEE = 0V
Symbol Parameter
-40°C
25°C
85°C
Min Typ Max Min Typ Max Min Typ Max
fMAX
tPD
tsk(o)
Output Frequency
Propagation Delay; NOTE 1
Output Skew; NOTE 2, 4
3.2 3.2 3.2
600 680 750 650 725 790 690 790 890
25 37
25 37
25 37
tsk(pp) Part-to-Part Skew; NOTE 3, 4
85 225
85 225
85 225
tjit
Buffer Additive Phase Jitter, RMS;
refer to Additive Phase Jitter section
0.03
0.03
0.03
tR/tF Output Rise/Fall Time 20% to 80% 60 200 325 100 200 280 130 200
All parameters are measured 1GHz unless otherwise noted.
NOTE 1: Measured from the differential input crossing point to the differential output crossing point.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the output differential cross points.
NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages
and with equal load conditions. Using the same type of inputs on each device, the outputs are measured
at the differential cross points.
NOTE 4: This parameter is defined in accordance with JEDEC Standard 65.
270
Units
GHz
ps
ps
ps
ps
ps
853111AY-02
www.icst.com/products/hiperclocks.html
5
REV. A JANUARY 10, 2006

5 Page





ICS853111-02 arduino
Integrated
Circuit
Systems, Inc.
ICS853111-02
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
TERMINATION FOR 2.5V LVPECL OUTPUT
Figure 5A and Figure 5B show examples of termination for
2.5V LVPECL driver. These terminations are equivalent to ter-
minating 50Ω to VCC - 2V. For VCC = 2.5V, the VCC - 2V is very
close to ground level. The R3 in Figure 5B can be eliminated
and the termination is shown in Figure 5C.
VC C O=2. 5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
R1 R3
250 250
2.5V
+
-
R2
62.5
R4
62.5
VCCO=2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
+
-
R1 R2
50 50
R3
18
FIGURE 5A. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
FIGURE 5B. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
VCCO=2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
+
-
R1 R2
50 50
FIGURE 5C. 2.5V LVPECL TERMINATION EXAMPLE
853111AY-02
www.icst.com/products/hiperclocks.html
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REV. A JANUARY 10, 2006

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