The DHL214D is an integrated dual frequency synthesizer with prescaler. It consists of a dual-modulus prescaler, programmable program(P) and swallow(S) counter, programmable reference(R) counter, a phase frequency detector(PFD) and a charge pump. A PLL can be completely implemented with external loop filter and voltage controlled oscillator(VCO). It is available in a 16-pin TSSOP plastic package.
Features
Two systems for transmitter and receiver
Wide frequency range (50MHz to 1.4GHz)
Wide supply voltage range (2.4V ~ 5.5V)
Selectable charge pump current (0.2mA, 0.4mA, 0.8mA, 1.6mA)
Selectable power down
Lock detection
3-wire serial interface
GP214D compatible
DHL214D是一款带有预分频器的集成双频合成器。它由对偶模量、预分频器、可编程程序（P）和吞咽（S）计数器、可编程参考（R）计数器、相位频率检测器（PFD）和电荷泵组成。PLL可以完全用外部环路滤波器和压控振荡器（VCO）实现。它有16针TSSOP塑料包装。
特点
发射器和接收器的两个系统
宽频率范围（50MHz至1.4GHz）
电源电压范围宽（2.4V~5.5V）
可选择的电荷泵电流（0.2mA、0.4mA、0.8mA、1.6mA）
可选择断电
锁定检测
三线串行接口
GP214D兼容