PLL521-23
Low Phase Noise PECL VCXO (100MHz to 200MHz)
PAD ASSIGNMENT AND DESCRIPTION
Die Pad
Name
Pad #
VCON
GNDOSC
GNDANA
GNDANA
GNDBUF
GNDBUF
GNDBUF
(optional)
PECL
PECLBAR
VDDBUF
(optional)
VDDBUF
1
2
3
4
5
6
7
8
9
10
Description
X (µm)
329.6
498.3
696.2
825.0
973.6
1150.0
1183.6
1183.6
1183.6
1182.4
Y (µm)
110.1
110.0
110.0
110.0
110.0
109.1
302.2
452.3
613.5
745.9
Control Voltage input. Use this pin to change the
output frequency by varying the applied Control
Voltage.
GND connection for oscillator circuitry.
GND connection for analog circuitry.
GND connection for analog circuitry.
GND connection for output buffer circuitry.
GND connection for output buffer circuitry.
GND connection for output buffer circuitry.
PECL output
PECL complementary output.
VDD connection for output buffer circuitry.
VDDBUF should be separately decoupled from other
VDDs whenever possible.
VDD connection for output buffer circuitry.
VDDBUF should be separately decoupled from other
VDDs whenever possible.
VDD connection for analog circuitry.
VDDANA should be separately decoupled from other
VDDs whenever possible.
Do Not Connect
Selector input to choose the OE control logic. See
table on page 1.
Output impedance selector
VDD connection for oscillator circuitry.
VDDOSC should be separately decoupled from other
VDDs whenever possible.
Oscillator Off Selection input pad. When low, turns
off the oscillator when output is disabled. When high
(default), oscillator running when output is disabled.
Internal pull-up
GND connection for oscillator circuitry.
Control Voltage input. Use this pin to change the
output frequency by varying the applied Control
Voltage (internally connected to pad 1).
Crystal oscillator input pad.
Crystal oscillator output pad.
OE input pad. See table on page 1.
11
1252.4
903.6
VDDANA
DNC
OESEL
BUFZSEL
VDDOSC
12
13
14
15
16
1252.4
1058.5
864.5
624.0
467.1
1081.3
1221.6
1221.6
1222.6
1222.7
OSCOFF
GNDOSC
(optional)
VCON
XIN
XOUT
OECTRL
17
271.1
1222.6
18
19
20
21
22
109.4
108.9
109.0
108.6
108.6
1222.9
1062.1
865.8
358.4
146.5
Note: for optimal Phase Noise performance, it is recommended to bond all optional VDD and GND pads.
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 05/19/05 Page 2
PLL [ PHASELINK CORPORATION ]
