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LMX2471 bảng dữ liệu(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LMX2471
Giải thích chi tiết về linh kiện  3.6 GHz Delta-Sigma Fractional-N PLL with 1.7 GHz Integer-N PLL
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Trang chủ  http://www.national.com
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Connection Diagram
24-Pin CSP (SLE) Package
20072122
Pin Descriptions
Pin #
Pin
Name
I/O
Pin Description
1
CPoutRF
O
RF charge pump output.
2
GND
-
Ground
3
GND
-
RF Ground
4
GND
-
Ground for RF PLL digital circuitry.
5
FinRF
I
RF prescaler input. Small signal input from the VCO.
6
FinRF*
I
RF prescaler complimentary input. For single-ended operation, a bypass capacitor should
be placed as close as possible to this pin and be connected directly to the ground plane.
7
VccRF
RF PLL power supply voltage input. Must be equal to VccIF . May range from 2.35V to
2.75V. Bypass capacitors should be placed as close as possible to this pin and be
connected directly to the ground plane.
8
EN
I
Chip enable input. High impedance CMOS input. When EN is high, the chip is powered
up, otherwise it is powered down.
9
ENOSC
I
This pin should be grounded for normal operation.
10
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.
11
DATA
I
MICROWIRE Data. High impedance binary serial data input.
12
LE
MICROWIRE Load Enable. High impedance CMOS input. Data stored in the shift
registers is loaded into the internal latches when LE goes HIGH
13
Ftest/LD
O
Test frequency output / Lock Detect
14
VddIF
-
Digital power supply for IF PLL
15
VccIF
-
IF power supply voltage input. Must be equal to VccRF. Input may range from 2.35 V to
2.75 V. Bypass capacitors should be placed as close as possible to this pin and be
connected directly to the ground plane.
16
GND
-
Ground for RF PLL digital circuitry.
17
FinIF
I
IF prescaler input. Small signal input from the VCO.
18
GND
-
Digital ground for IF PLL
19
CPoutIF
O
IF PLL charge pump output
20
FLoutIF
O
IF Fastlock Output. Also functions as Programmable TRI-STATE CMOS output.
21
OSCout*
I/O
Complementary reference input or oscillator output.
22
OSCin
I
Reference input
23
VddRF
-
Digital power supply for RF PLL
24
FLoutRF
O
RF Fastlock Output. Also functions as Programmable TRI-STATE CMOS output.
www.national.com
2


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Mô tả tương tự - LMX2471

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