lmx2505lq1321 National Semiconductor Corporation, lmx2505lq1321 Datasheet - Page 2

• Manufacturer Part Number: lmx2505lq1321
• Description: Pllatinu Dual Frequency Synthesizer System With Integrated Vcos
• Manufacturer: National Semiconductor Corporation

www.national.com
Connection Diagram
NOTE: Analog ground connected through exposed die attached pad.
Pin Descriptions
Pin Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
RF1out
RF2out
OSCin
Name
DATA
GND
GND
GND
GND
CLK
V
V
V
V
V
V
V
V
NC
NC
NC
NC
NC
CE
BS
LD
L1
L2
LE
DD
DD
DD
DD
DD
CC
CC
CC
I/O
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
O
O
O
I
I
I
I
I
I
28-Pin 5x5 LLP (LQ) Package
Description
Reference frequency input
Ground for digital circuitry
Supply voltage for analog circuitry
Ground for analog circuitry
Do not connect to any node on the printed circuit board.
Do not connect to any node on the printed circuit board.
Supply voltage for RF analog circuitry
Do not connect to any node on the printed circuit board.
RF2 VCO tank pin. An external inductor is required between pins
L1 and L2 to set the resonant frequency of RF2 VCO (PDC800).
RF2 VCO tank pin. An external inductor is required between pins
L1 and L2 to set the resonant frequency of RF2 VCO (PDC800).
Do not connect to any node on the printed circuit board.
Do not connect to any node on the printed circuit board.
Supply voltage for RF analog circuitry
RF output of RF1 VCO for PDC1500
Supply voltage for RF analog circuitry
RF output of RF2 VCO for PDC800
Supply voltage for analog circuitry
Ground for digital circuitry
Supply voltage for digital circuitry
Ground for digital circuitry
Supply voltage for digital circuitry
MICROWIRE Latch Enable
MICROWIRE Data
MICROWIRE Clock
Chip enable control pin
Band select control pin
Lock detect pin
Supply voltage for digital circuitry
2
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