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LMX2486 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LMX2486
Description  1.0 GHz - 4.5 GHz High Performance Delta-Sigma Low Power Dual PLLatinum TM Frequency Synthesizers with 3.0 GHz Integer PLL
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMX2486 Datasheet(HTML) 2 Page - National Semiconductor (TI)

 
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Connection Diagram
Top View
24-Pin LLP (SQ)
20156922
Pin Descriptions
Pin #
Pin
Name
I/O
Pin Description
0
GND
-
Ground Substrate. This is on the bottom of the package and must be grounded.
1
CPoutRF
O
RF PLL charge pump output.
2
GND
-
RF PLL analog ground.
3
VddRF1
-
RF PLL analog power supply.
4
FinRF
I
RF PLL high frequency input pin.
5
FinRF*
I
RF PLL complementary high frequency input pin. Shunt to ground with a 100 pF
capacitor.
6
LE
I
MICROWIRE Load Enable. High impedance CMOS input. Data stored in the shift
registers is loaded into the internal latches when LE goes HIGH
7
DATA
I
MICROWIRE Data. High impedance binary serial data input.
8
CLK
I
MICROWIRE Clock. High impedance CMOS Clock input. Data for the various counters is
clocked into the 24 bit shift register on the rising edge
9
VddRF2
-
Power supply for RF PLL digital circuitry.
10
CE
I
Chip Enable control pin. Must be pulled high for normal operation.
11
VddRF5
I
Power supply for RF PLL digital circuitry.
12
Ftest/LD
O
Test frequency output / Lock Detect.
13
FinIF
I
IF PLL high frequency input pin.
14
VddIF1
-
IF PLL analog power supply.
15
GND
-
IF PLL digital ground.
16
CPoutIF
O
IF PLL charge pump output
17
VddIF2
-
IF PLL power supply.
18
OSCout
O
Buffered output of the OSCin signal.
19
ENOSC
I
Oscillator enable. When this is set to high, the OSCout pin is enabled regardless of the
state of other pins or register bits.
20
OSCin
I
Reference Input.
21
NC
I
This pin must be left open.
22
VddRF3
-
Power supply for RF PLL digital circuitry.
23
FLoutRF
O
RF PLL Fastlock Output. Also functions as Programmable TRI-STATE CMOS output.
24
VddRF4
-
RF PLL analog power supply.
www.national.com
2


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