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PDF ICS853111B Data sheet ( Hoja de datos )
| Número de pieza | ICS853111B | |
| Descripción | LVPECL/ECL FANOUT BUFFER | |
| Fabricantes | ICST | |
| Logotipo |  |
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Integrated
Circuit
Systems, Inc.
ICS853111B
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS853111B is a low skew, high perfor-
ICS mance 1-to-10 Differential-to-2.5V/3.3V LVPECL/
HiPerClockS™ ECL Fanout Buffer and a member of the
HiPerClock S™ family of High Performance
Clock Solutions from ICS. The ICS853111B
is characterized to operate from either a 2.5V or a 3.3V
power supply. Guaranteed output and part-to-par t skew
characteristics make the ICS853111B ideal for those
clock distribution applications demanding well defined
performance and repeatability.
FEATURES
• 10 differential 2.5V/3.3V LVPECL / ECL outputs
• 2 selectable differential input pairs
• PCLKx, nPCLKx pairs can accept the following
differential input levels: LVPECL, LVDS, CML, SSTL
• Maximum output frequency: >3GHz
• Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nPCLK input
• Output skew: 20ps (typical)
• Part-to-part skew: 85ps (typical)
• Propagation delay: 495ps (typical)
• Jitter, RMS: < 0.03ps (typical)
• LVPECL mode operating voltage supply range:
VCC = 2.375V to 3.8V, VEE = 0V
• ECL mode operating voltage supply range:
VCC = 0V, VEE = -3.8V to -2.375V
• -40°C to 85°C ambient operating temperature
• Lead-Free package fully RoHS compliant
BLOCK DIAGRAM
PCLK0
nPCLK0
PCLK1
nPCLK1
0
1
CLK_SEL
VBB
853111BY
PIN ASSIGNMENT
Q0
nQ0
Q1
nQ1
24 23 22 21 20 19 18 17
Q2
nQ2
VCCO
nQ2
Q2
25
26
27
16 VCCO
15 Q7
14 nQ7
Q3
nQ3
nQ1 28 ICS853111B 13 Q8
Q1 29
12 nQ8
Q4
nQ4
nQ0
Q0
30
31
11 Q9
10 nQ9
Q5
nQ5
VCCO 32
9 VCCO
1234 56 78
Q6
nQ6
Q7
nQ7
Q8 32-Lead TQFP, E-PAD
nQ8 7mm x 7mm x 1.0mm package body
Y Package
Q9 Top View
nQ9
www.icst.com/products/hiperclocks.html
1
REV. A JUNE 16, 2005
1 page  
Integrated
Circuit
Systems, Inc.
ICS853111B
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 >3 >3
375 475 575 395 495 595 425 530 635
20 32
20 32
20 32
tsk(pp) Part-to-Part Skew; NOTE 3, 4
85 150
85 150
85 150
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% 75 150 220 80 150 215 78 150
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.
215
Units
GHz
ps
ps
ps
ps
ps
853111BY
www.icst.com/products/hiperclocks.html
5
REV. A JUNE 16, 2005
5 Page 
Integrated
Circuit
Systems, Inc.
ICS853111B
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
TERMINATION FOR 2.5V LVPECL OUTPUTS
Figure 5A and Figure 5B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminat-
ing 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 CO=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
VCC O=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
853111BY
www.icst.com/products/hiperclocks.html
11
REV. A JUNE 16, 2005
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ICS853111B.PDF ] | |
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