CY7B991-7集成电路（IC）的时钟缓冲器驱动器规格书PDF中文资料

CY7B991-7属于集成电路（IC）的时钟缓冲器驱动器。由赛普拉斯半导体公司制造生产的CY7B991-7时钟缓冲器，驱动器时钟缓冲器和驱动器集成电路产品族中的产品用于帮助信号在系统中传输，常用作频率/时间参考信号，以同步系统内的活动。尽管这些器件最常用到的功能就是缓冲（即，为使信号不受驱动负载的影响而从某个信号源复制信号），但是该产品族中的某些器件还能执行其他功能，例如选择性改变缓冲信号路径、按某个整数值分割信号频率，或进行所用电信号格式转换。

Functional Description

The CY7B991 and CY7B992 Programmable Skew Clock Buffers (PSCB) offer user selectable control over system clock functions. These multiple output clock drivers provide the system integrator with functions necessary to optimize the timing of high performance computer systems. Each of the eight individual drivers, arranged in four pairs of user controllable outputs, can drive terminated transmission lines with impedances as low as 50Ω. They can deliver minimal and specified output skews and full swing logic levels (CY7B991 TTL or CY7B992 CMOS).

特性 Features

■ All output pair skew <100 ps typical (250 maximum)

■ 3.75 to 80 MHz output operation

■ User selectable output functions

❐ Selectable skew to 18 ns

❐ Inverted and non-inverted

❐ Operation at 1⁄2 and 1⁄4 input frequency

❐ Operation at 2x and 4x input frequency (input as low as 3.75 MHz)

■ Zero input to output delay

■ 50 duty cycle outputs

■ Outputs drive 50Ω terminated lines

■ Low operating current

■ 32-pin PLCC/LCC package

■ Jitter