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参数资料
| 型号： | LMX2331A |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinum⑩双频率合成射频个人通信 |
| 文件页数： | 2/17页 |
| 文件大小： | 392K |
| 代理商： | LMX2331A |
Connection Diagram
Pin Description
Pin
No.
1
Pin
Name
V
CC
1
I/O
Description
—
Power supply voltage input for RF analog and RF digital circuits. Input may range from 2.7V to
5.5V. V
CC
1 must equal V
CC
2. Bypass capacitors should be placed as close as possible to this
pin and be connected directly to the ground plane.
Power Supply for RF charge pump. Must be
≥
V
CC
.
Internal charge pump output. For connection to a loop filter for driving the input of an external
VCO.
Ground for RF digital circuitry.
RF prescaler input. Small signal input from the VCO.
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.
Ground for RF analog circuitry.
Oscillator input. The input has a V
CC
/2 input threshold and can be driven from an external CMOS
or TTL logic gate.
Ground for IF digital, MICROWIRE
, F
o
LD, and oscillator circuits.
Multiplexed output of the RF/IF programmable or reference dividers, RF/IF lock detect signals
and Fastlock mode. CMOS output (see Programmable Modes)
High impedance CMOS Clock input. Data for the various counters is clocked in on the rising
edge, into the 22-bit shift register.
Binary serial data input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
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(.
Ground for IF analog circuitry.
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.
IF prescaler input. Small signal input from the VCO.
Ground for IF digital, MICROWIRE, F
o
LD, and oscillator circuits.
IF charge pump output. For connection to a loop filter for driving the input of an external VCO.
Power Supply for IF charge pump. Must be
≥
V
CC
.
2
3
V
P
1
D
o
RF
—
O
4
5
6
GND
f
IN
RF
f
IN
RF
—
I
I
7
8
GND
OSC
in
—
I
9
10
GND
F
o
LD
—
O
11
Clock
I
12
Data
I
13
LE
I
14
15
GND
f
IN
IF
—
I
16
17
18
19
f
IN
IF
GND
D
o
IF
V
P
2
I
—
O
—
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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| LMX2331 | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331LTM | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331LSLB | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2331ATM | 制造商:Texas Instruments 功能描述: |
| LMX2331ATMX | 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2331L | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| LMX2331LSLB | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331LSLBX | 制造商:Texas Instruments 功能描述: |
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