lmx2502lq1635 National Semiconductor Corporation, lmx2502lq1635 Datasheet - Page 2

• Manufacturer Part Number: lmx2502lq1635
• Description: Pllatinum? Frequency Synthesizer System With Integrated Vco
• 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
OSCin
CPout
Name
DATA
RFout
GND
GND
CLK
V
V
V
V
V
V
V
V
V
V
NC
NC
NC
NC
NC
NC
CE
Fin
NC
LE
LD
DD
DD
DD
DD
CC
CC
CC
CC
CC
CC
28-Pin LLP (LQ) Package
I/O
O
O
O
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
I
I
I
I
I
I
2
Description
IF PLL charge pump output
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 IF analog circuitry
MICROWIRE Latch Enable
MICROWIRE Clock
MICROWIRE Data
Supply voltage for VCO
Do not connect to any node on the printed circuit board.
Do not connect to any node on the printed circuit board.
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 VCO
Supply voltage for VCO output buffer
Buffered VCO output
Supply voltage for RF prescaler
Supply voltage for charge pump
Supply voltage for RF digital circuitry
Lock Detect
Chip Enable control pin
Ground for digital circuitry
Reference frequency input
Supply voltage for reference input buffer
Ground for digital circuitry
Supply voltage for IF digital circuitry
IF buffer/prescaler input
Supply voltage for IF buffer/prescaler
Do not connect to any node on the printed circuit board.
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