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LMX2531LQ1500E データシート(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号. LMX2531LQ1500E
部品情報  High Performance Frequency Synthesizer System with Integrated VCO
ダウンロード  23 Pages
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
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LMX2531LQ1500E Datasheet(HTML) 4 Page - National Semiconductor (TI)

 
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Pin Descriptions (Continued)
Pin #
Pin Name
I/O
Description
19
GND
-
Ground for the VCO circuitry.
20
GND
-
Ground for the VCO Output Buffer circuitry.
21
Fout
O Buffered RF Output for the VCO.
22
VccBUF
-
Power Supply for the VCO Buffer circuitry. Input may range from 2.8 - 3.2 V. Bypass capacitors
should be placed as close as possible to this pin and ground.
23
Vtune
I
Tuning voltage input for the VCO. For connection to the CPout Pin through an external passive loop
filter.
24
CPout
O Charge pump output for PLL. For connection to Vtune through an external passive loop filter.
25
FLout
O An open drain NMOS output which is used for FastLock or a general purpose output.
26
VregPLL1
-
Internally regulated voltage for PLL charge pump. Not intended to drive an external load. Connect to
ground with a capacitor.
27
VccPLL
-
Power Supply for the PLL. Input may range from 2.8 - 3.2 V. Bypass capacitors should be placed as
close as possible to this pin and ground.
28
VregPLL2
-
Internally regulated voltage for RF digital circuitry. Not intended to drive an external load. Connect to
ground with a capacitor.
30
Ftest/LD
O Multiplexed CMOS output. Typically used to monitor PLL lock condition.
31
OSCin
I
Oscillator input.
32
OSCin*
I
Oscillator complimentary input. When a single ended source is used, then a bypass capacitor should
be placed as close as possible to this pin and be connected to ground.
33
Test
O This pin if for test purposes and should be grounded for normal operation.
34
GND
-
Ground
36
VregDIG
-
Internally regulated voltage for LDO digital circuitry.
www.national.com
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