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PL685-28 fiches techniques PDF

Micrel - 19MHz to 250MHz Low Phase-Noise XO

Numéro de référence PL685-28
Description 19MHz to 250MHz Low Phase-Noise XO
Fabricant Micrel 
Logo Micrel 





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PL685-28 fiche technique
(Preliminary) PL685-28
FE AT UR E S
19MHz to 250MHz Low Phase-Noise XO
PAD CONFIGURATION
< 0.6ps RMS phase jitter (12kHz to 20MHz) at
155.52MHz
30ps max peak to peak period jitter
8bit Switch Capacitor for ±50PPM crystal CLoad
tuning
о Load Capacitance Tuning Range: 8pF to 12pF
Ultra Low-Power Consumption
о < 90 mA @155MHz PECL output
о <10A at Power Down (PDB) Mode
Input Frequency:
о Fundamental Crystal: 19MHz to 40MHz
Output Frequency:
о 19MHz to 250MHz output.
Output types: LVPECL.
Programmable OE input polarity selection.
Power Supply: 3.3V, ±10%
Operating Temperature Ranges:
о Commercial: 0C to 70C
о Industrial: -40C to 85C
Available in Die or Wafer
DESCRIPTION
The PL685-28 is a Dual LC core monolithic IC clock,
capable of maintaining sub-1ps RMS phase jitter,
while covering a wide frequency output range up to
250MHz, without the use of external components.
The high performance and high frequency output is
achieved using a low cost fundamental crystal of
between 19MHz and 40 MHz. The PL685-28 is
designed to address the demanding requirements of
high performance applications such as Fiber
Channel, serial ATA, Ethernet, SAN, SONET/SDH,
etc.
65 mil
SCLK 9
8
Die ID
OE/PDB/
SDIO
DNC
10
11
GND_ANA
GND_DIG
GND_BUF
12
13
14
(0,0)
PL685
(1650,2250)
7
6 VDD_ANA
5 VDD_DIG
4 VDD_BUF
3 QB
2 VDD_BUF
1Q
DIE SPECIFICATIONS
Name
Size
Reverse side
Pad dimensions
Thickness
Value
65 x 88.6 mil
GND
80 micron x 80 micron
8 mils
OUTPUT ENABLE CONTROL
OE Select
(Programmable)
OE
State
0
0 (Default)
1
Output enabled
Tri-state
1 (Default)
0
1 (Default)
Tri-state
Output enabled
BLOCK DIAGRAM
OE/PDB
XIN/REF
XOUT
Xtal
Osc
(Default pre-programmed output path)
PD/CP
LF HF
LCVCOs
Pre-scalar
4/6
/2
Programmable Function
M Divider
(5 bit)
P Divider
(4 bit)
/2
Q
QB
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1(408) 944 -0800 • fax +1(408) 474-1000 • www.micrel.com Rev 12/02/11 Page 1

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