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参数资料
| 型号： | LC72121 |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDIP22 |
| 封装： | DIP-22 |
| 文件页数： | 15/23页 |
| 文件大小： | 377K |
| 代理商： | LC72121 |
No. 5815-22/23
LC72121, 72121M, 72121V
DO pin usage
The DO pin can be used for IF counter count completion checking and as an unlock detection output in addition to its
use in data output mode. It is also possible to have the DO pin reflect the state of an input pin to input that state to the
microcontroller.
Power supply pins
Capacitors must be inserted between the power supply VDD and VSS pins for noise exclusion. These capacitors must be
placed as close as possible to the VDD and VSS pins.
VCO setup
Applications must be designed so that the VCO (local oscillator) does not stop, even if the control voltage (Vtune) goes
to 0 V. If it is possible for the oscillator to stop, the application must use the control data (DLC) to temporarily force
Vtune to VCC to prevent deadlock from occurring. (Deadlock clear circuit)
Front end connection example
Since this product (and the LC72131 as well) is designed with the relatively high resistance of 200 k
for the pull-
down (on) resistors built in to the FMIN and AMIN pins, a common AM/FM local oscillator buffer can be used as
shown in the following circuit.
PD pin
Note that the charge pump output voltage is reduced when this IC, which is a 3-V system, is used to replace the
LC72131, which is a 5-V system. This means that since the loop gain is reduced, the loop filter constants, the lock time
(SD wait time), and other related parameters must be reevaluated in the end product design.
相关PDF资料 |
PDF描述 |
|---|---|
| LC72121V | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| LC72121M | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| LC72131M | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
| LC72134M | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| LC72135M | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72121_03 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers for Electronic Tuning |
| LC72121-D-E | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack 制造商:ON Semiconductor 功能描述:PLL FREQ SYNTHESIZER 制造商:ON Semiconductor 功能描述:FNFLD / PLL FREQUENCY SYNTHESIZER |
| LC72121M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:CMOS IC PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA-AH | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
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