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SY89531LHZ Datasheet(PDF) 11 Page - Micrel Semiconductor

Part # SY89531LHZ
Description  3.3V, PRECISION, 33MHz to 500MHz PROGRAMMABLE LVPECL AND
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

SY89531LHZ Datasheet(HTML) 11 Page - Micrel Semiconductor

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Precision Edge®
SY89531L
Micrel, Inc.
M9999-010808
hbwhelp@micrel.com or (408) 955-1690
Power Supply Filtering Techniques
As with any high-speed integrated circuit, power supply
filtering is very important. At a minimum, V
CCA, VCC_Logic,
and all V
CCO pins should be individually connected using a
via to the power supply plane, and separate bypass
capacitors should be used for each pin. To achieve optimal
jitter performance, each power supply pin should use
separate instances of the circuit shown in Figure 4.
*For VCC_Analog,VCC_TTL, VCC1,
use ferrite bead = 200mA, 0.45
Ω DC,
Murata P/N BLM21A1025
*For VCC_OUT use ferrite bead = 3A, 0.025
Ω DC,
Murata, P/N BLM31P005
*Component size: 0805
1
µF
22
µF
0.01
µF
Ferrite Bead*
“Power Supply”
side
“Device”
side
VCC
Pins
Figure 4. Power Supply Filtering
Output Logic Characteristics
See
“Output Termination Recommendations” for
illustrations. In cases where single-ended output is desired,
the designer should terminate the unused complimentary
output in the same manner as the normal output that is
begin used. Unused output pairs can be left floating. Unused
output banks can be switched off by tying the appropriate
FSEL pins to ground. Unused output pairs that are in a
bank that is disabled can be left floating, regardless of output
driver type.
LVPECL operation:
• Typical voltage swing is 700mV
PP to 800mVPP into
50
Ω.
• Common mode voltage is V
CC–1.3V, typical.
• 100
Ω termination across the output pair is NOT
recommended for LVPECL.
HSTL operation (Bank B):
• Typical voltage swing is 250mV
PP to 450mVPP into
effective 50
Ω.
Thermal Considerations
This part has an exposed die pad for enhanced heat
dissipation. We strongly recommend soldering the exposed
pad to a ground plane. Where this is not possible, we
recommend maintaining at least 500lfpm air flow.
For additional information on exposed-pad characteristics
and implementation details, see Amkor Technology’s write-
up at www.amkor.com.
FSEL_A2(1) (MSB)
FSEL_A1(1)
FSEL_A0(1) (LSB)
Output Divider
0
0
0
Output Disable Function, all outputs: Q = LOW, /Q = HIGH
0
0
1
VCO
÷ 2
0
1
0
VCO
÷ 4
0
1
1
VCO
÷ 6
1
0
0
VCO
÷ 8
1
0
1
VCO
÷ 10
1
1
0
VCO
÷ 12
1
1
1
VCO
÷ 18
POST-DIVIDE FREQUENCY SELECT TABLE (FSEL)
Note 1. Same dividers apply to FSEL_B (0:2) and FSEL_C (0:2).


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