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參數(shù)資料
| 型號： | LMX2330ATMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PHASE LOCKED LOOP, 2500 MHz, PDSO20 |
| 封裝： | 0.173 INCH, PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大小： | 392K |
| 代理商： | LMX2330ATMX |
Connection Diagram
Pin Description
Pin
No.
Pin
Name
I/O
Description
1V
CC1
—
Power supply voltage input for RF analog and RF digital circuits. Input may range from 2.7V to
5.5V. V
CC1 must equal VCC2. Bypass capacitors should be placed as close as possible to this
pin and be connected directly to the ground plane.
2V
P1
—
Power Supply for RF charge pump. Must be
≥ V
CC.
3D
o RF
O
Internal charge pump output. For connection to a loop filter for driving the input of an external
VCO.
4
GND
—
Ground for RF digital circuitry.
5f
IN RF
I
RF prescaler input. Small signal input from the VCO.
6f
IN RF
I
RF prescaler complementary input. A bypass capacitor should be placed as close as possible to
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity.
7
GND
—
Ground for RF analog circuitry.
8
OSC
in
I
Oscillator input. The input has a V
CC/2 input threshold and can be driven from an external CMOS
or TTL logic gate.
9
GND
—
Ground for IF digital, MICROWIRE,F
oLD, and oscillator circuits.
10
F
oLD
O
Multiplexed output of the RF/IF programmable or reference dividers, RF/IF lock detect signals
and Fastlock mode. CMOS output
(see Programmable Modes).
11
Clock
I
High impedance CMOS Clock input. Data for the various counters is clocked in on the rising
edge, into the 22-bit shift register.
12
Data
I
Binary serial data input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
13
LE
I
Load enable high impedance CMOS input. When LE goes HIGH, data stored in the shift registers
is loaded into one of the 4 appropriate latches (control bit dependent(.
14
GND
—
Ground for IF analog circuitry.
15
f
IN IF
I
IF prescaler complementry input. A bypass capacitor should be placed as close as possible to
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity.
16
f
IN IF
I
IF prescaler input. Small signal input from the VCO.
17
GND
—
Ground for IF digital, MICROWIRE, F
oLD, and oscillator circuits.
18
D
o IF
O
IF charge pump output. For connection to a loop filter for driving the input of an external VCO.
19
V
P2
—
Power Supply for IF charge pump. Must be
≥ V
CC.
Thin Shrink Small Outline Package (TM)
DS012331-2
Order Number LMX2330ATM, LMX2331ATM or LMX2332ATM
NS Package Number MTC20
www.national.com
2
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