CDC516DGGR集成电路（IC）的时钟发生器PLL频率合成器规格书PDF中文资料

CDC516DGGR属于集成电路（IC）的时钟发生器PLL频率合成器。由美国德州仪器公司制造生产的CDC516DGGR时钟发生器，PLL，频率合成器时钟发生器、PLL 和频率合成器集成电路 (IC) 可为逻辑器件提供参考信号的稳定定时脉冲，这些器件包括计算机、微控制器、数据通信系统和图形/视频发生器。这些集成电路可能包括缓冲器、驱动器、分频器、倍频器、多路复用器、合成器、扇出分配器和预分频器。

Use CDCVF2510A as a Replacement for

this Device

Phase-Lock Loop Clock Distribution for

Synchronous DRAM Applications

Distributes One Clock Input to Four Banks

of Four Outputs

Separate Output Enable for Each Output

Bank

External Feedback Pin (FBIN) Is Used to

Synchronize the Outputs to the Clock Input

No External RC Network Required

Operates at 3.3-V VCC

Packaged in Plastic 48-Pin Thin Shrink

Small-Outline Package

description

The CDC516 is a high-performance, low-skew,

low-jitter, phase-lock loop clock driver. It uses a

phase-lock loop (PLL) to precisely align, in both

frequency and phase, the feedback output

(FBOUT) to the clock (CLK) input signal. It is

specifically designed for use with synchronous

DRAMs. The CDC516 operates at 3.3-V VCC and

is designed to drive up to five clock loads per

output.

Four banks of four outputs provide 16 low-skew,

low-jitter copies of the input clock. Output signal

duty cycles are adjusted to 50 percent,

independent of the duty cycle at the input clock.

Each bank of outputs can be enabled or disabled

separately via the 1G, 2G, 3G, and 4G control

inputs. When the G inputs are high, the outputs

switch in phase and frequency with CLK; when the

G inputs are low, the outputs are disabled to the

logic-low state.

Unlike many products containing PLLs, the CDC516 does not require external RC networks. The loop filter for

the PLL is included on-chip, minimizing component count, board space, and cost.

Because it is based on PLL circuitry, the CDC516 requires a stabilization time to achieve phase lock of the

feedback signal to the reference signal. This stabilization time is required following power up and application

of a fixed-frequency, fixed-phase signal at CLK, as well as following any changes to the PLL reference or

feedback signals. The PLL may be bypassed for test purposes by strapping AVCC to ground.

The CDC516 is characterized for operation from 0°C to 70°C.