CDC509 - 3.3V 锁相环时钟驱动器

CDC509是TI德州仪器公司的一款无产品，CDC509是3.3V 锁相环时钟驱动器，本站介绍了CDC509的封装应用图解、特点和优点、功能等，并给出了与CDC509相关的TI元器件型号供参考。

CDC509 - 3.3V 锁相环时钟驱动器 - 无 - 零延迟缓冲器 - 德州仪器

产品描述

The CDC509 is a high-performance, low-skew, low-jitter, phase-lock loop (PLL) clock driver. It uses a PLL to precisely align, in both frequency and phase, the feedback (FBOUT) output to the clock (CLK) input signal. It is specifically designed for use with synchronous DRAMs. The CDC509 operates at 3.3-V VCC and is designed to drive up to five clock loads per output.

One bank of five outputs and one bank of four outputs provide nine low-skew, low-jitter copies of CLK. Output signal duty cycles are adjusted to 50 percent, independent of the duty cycle at CLK. Each bank of outputs can be enabled or disabled separately via the control (1G and 2G) 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 CDC509 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 CDC509 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 can be bypassed for test purposes by strapping AVCC to ground.

The CDC509 is characterized for operation from 0°C to 70°C.

产品特性

Use CDCVF2509A as a Replacement for this Device
Phase-Lock Loop Clock Distribution for Synchronous DRAM Applications
Distributes One Clock Input to One Bank of Five and One Bank of Four Outputs
Separate Output Enable for Each Output Bank
External Feedback (FBIN) Pin Is Used to Synchronize the Outputs to the Clock Input
No External RC Network Required
Operates at 3.3-V VCC
Packaged in Plastic 24-Pin Thin Shrink Small-Outline Package

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