參數(shù)資料
型號(hào)： LMX2377USLEX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： POSITIONER
中文描述： PLL FREQUENCY SYNTHESIZER, 2500 MHz, PQCC20
封裝： PLASTIC, UTCSP-20
文件頁(yè)數(shù)： 4/44頁(yè)
文件大?。?/td> 3181K
代理商： LMX2377USLEX
Pin Descriptions
(Continued)
Pin
Name
Pin No.
20-Pin UTCSP
Pin No.
24-Pin CSP
Pin No.
20-Pin
TSSOP
6
I/O
Description
f
IN
Main
5
6
I
Main prescaler complementary input. For single ended operation,
this pin should be AC grounded. The LMX2377U Main PLL can be
driven differentially when the bypass capacitor is omitted.
Ground for the Main PLL analog circuitry.
Reference oscillator input. It has an approximate V
CC
/2 input
threshold and can be driven from an external CMOS or TTL logic
gate.
Ground for the Aux PLL digital circuitry, MICROWIRE, F
o
LD, and
oscillator circuits.
Programmable multiplexed output pin. Functions as a general
purpose CMOS TRI-STATE output, Main/Aux PLL open drain
analog lock detect output, N and R divider output or Fastlock
output, which connects a parallel resistor to the external loop filter.
MICROWIRE Clock input. High impedance CMOS input. Data is
clocked into the 22-bit shift register on the rising edge of Clock.
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.
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.
Power supply bias for the MICROWIRE circuitry. Must be
≤
V
CC
.
Typically connected to the same supply level as the
microprocessor or baseband controller to enable programming at
low voltages.
Ground for the Aux PLL analog circuitry.
Aux PLL prescaler input. Small signal input from the VCO.
Ground for the Aux PLL digital circuitry, MICROWIRE, F
o
LD, and
oscillator circuits.
Aux PLL charge pump output. the output is connected to an
external loop filter, which drives the input of the VCO.
Aux PLL charge pump power supply. Must be
≥
V
CC
.
Power supply bias for the Aux PLL analog and digital circuits,
F
o
LD, and oscillator circuits. V
CC
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.
No Connect
GND
OSC
in
6
7
7
8
7
8
—
I
GND
8
10
9
—
F
o
LD
9
11
10
O
Clock
10
12
11
I
Data
11
14
12
I
LE
12
15
13
I
Vμc
13
16
14
—
GND
f
IN
Aux
GND
14
15
16
17
18
19
15
16
17
—
I
—
D
o
Aux
17
20
18
O
V
P
Aux
V
CC
18
19
22
23
19
20
—
—
NC
—
1, 9, 13, 21
—
—
L
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2377UTM 功能描述:IC FREQ SYNTH DUAL 20TSSOP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)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(shí)鐘 輸出:時(shí)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(wú)/無(wú) 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:*
LMX2377UTMX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications
LMX2410QM 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit
LMX2411 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Baseband Processor for Radio Communications
LMX2411M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit
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