參數(shù)資料
型號： LMX2331UTM/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： PLL合成/DDS/VCOs
英文描述： PLL FREQUENCY SYNTHESIZER, 2000 MHz, PDSO20
封裝： 0.173 INCH, PLASTIC, TSSOP-20
文件頁數(shù)： 34/49頁
文件大?。?/td> 4568K
代理商： LMX2331UTM/NOPB
Pin Descriptions (Continued)
Pin
Name
Pin No.
20-Pin UTCSP
Pin No.
24-Pin CSP
Pin No.
20-Pin TSSOP
I/O
Description
f
IN RF
5
6
I
RF PLL prescaler complementary input. For single ended
operation, this pin should be AC grounded. The LMX233xU RF
PLL can be driven differentially when the bypass capacitor is
omitted.
GND
6
7
—
Ground for the RF PLL analog circuitry.
OSC
in
7
8
I
Reference oscillator input. The input has an approximate V
CC/2
threshold and can be driven from an external CMOS or TTL logic
gate.
GND
8
10
9
—
Ground for the IF PLL digital circuits, MICROWIRE,F
oLD, and
oscillator circuits.
F
oLD
9
11
10
O
Programmable multiplexed output pin. Functions as a general
purpose CMOS TRI-STATE output, RF/IF PLL push-pull analog
lock detect output, N and R divider output or Fastlock output,
which connects a parallel resistor to the external loop filter.
Clock
10
12
11
I
MICROWIRE Clock input. High impedance CMOS input. Data is
clocked into the 22-bit shift register on the rising edge of Clock.
Data
11
14
12
I
MICROWIRE Data input. High impedance CMOS input. Binary
serial data. The MSB of Data is shifted in first. The last two bits
are the control bits.
LE
12
15
13
I
MICROWIRE Latch Enable input. High impedance CMOS input.
When LE transitions HIGH, Data stored in the shift register is
loaded into one of 4 internal control registers.
GND
13
16
14
—
Ground for the IF PLL analog circuitry.
f
IN IF
14
17
15
I
IF PLL prescaler complementary input. For single ended
operation, this pin should be AC grounded. The LMX233xU IF
PLL can be driven differentially when the bypass capacitor is
omitted.
f
IN IF
15
18
16
I
IF PLL prescaler input. Small signal input from the VCO.
GND
16
19
17
—
Ground for the IF PLL digital circuitry, MICROWIRE, F
oLD, and
oscillator circuits.
D
o IF
17
20
18
O
IF PLL charge pump output. The output is connected to the
external loop filter, which drives the input of the VCO.
V
P IF
18
22
19
—
IF PLL charge pump power supply. Must be
≥ V
CC.
V
CC
19
23
20
—
Power supply bias for the IF PLL analog and digital circuits,
MICROWIRE, F
oLD, and oscillator circuits. VCC may range from
2.7V to 5.5V. Bypass capacitors should be placed as close as
possible to this pin and be connected directly to the ground
plane.
NC
X
1, 9, 13, 21
X
—
No connect.
LMX2330U/LMX2331U/LMX2332U
www.national.com
4
相關(guān)PDF資料
PDF描述
LMX2331USLEX PLL FREQUENCY SYNTHESIZER, 2000 MHz, PQCC24
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LMX2335LTMX/NOPB PLL FREQUENCY SYNTHESIZER, 1100 MHz, PDSO16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2331UTMX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications
LMX2332 WAF 制造商:Texas Instruments 功能描述:
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LMX2332ATM 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LMX2332ATMX 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
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