CDCLVP1212中文资料低抖动 2 路输入可选 1:12 通用至 LVPECL 缓冲器数据手册TI规格书

描述 Description

The CDCLVP1212 is a highly versatile, low additive jitter buffer that can generate 12 copies of LVPECL clock outputs from one of two selectable LVPECL, LVDS, or LVCMOS inputs for a variety of communication applications. It has a maximum clock frequency up to 2 GHz. The CDCLVP1212 features an on-chip multiplexer (MUX) for selecting one of two inputs that can be easily configured solely through a control terminal. The overall additive jitter performance is less than 0.1 ps, RMS from 10 kHz to 20 MHz, and overall output skew is as low as 25 ps, making the device a perfect choice for use in demanding applications.

The CDCLVP1212 clock buffer distributes one of two selectable clock inputs (IN0, IN1) to 12 pairs of differential LVPECL clock outputs (OUT0, OUT11) with minimum skew for clock distribution. The CDCLVP1212 can accept two clock sources into an input multiplexer. The inputs can be LVPECL, LVDS, or LVCMOS/LVTTL.

The CDCLVP1212 is specifically designed for driving 50-Ω transmission lines. When driving the inputs in single-ended mode, the LVPECL bias voltage (VAC_REF) should be applied to the unused negative input terminal. However, for high-speed performance up to 2 GHz, differential mode is strongly recommended.

The CDCLVP1212 is packaged in a small 40-terminal, 6-mm × 6-mm QFN package and is characterized for operation from –40°C to 85°C.

特性 Features

• 2:12 Differential Buffer
• Selectable Clock Inputs Through Control Terminal
• Universal Inputs Accept LVPECL, LVDS, and LVCMOS/LVTTL
• 12 LVPECL Outputs
• Maximum Clock Frequency: 2 GHz
• Maximum Core Current Consumption: 88 mA
• Very Low Additive Jitter: 20-MHz Offset Range:
• 57 fs, rms (typ) @ 122.88 MHz
• 48 fs, rms (typ) @ 156.25 MHz
• 30 fs, rms (typ) @ 312.5 MHz

• 2.375-V to 3.6-V Device Power Supply
• Maximum Propagation Delay: 550 ps
• Maximum Output Skew: 25 ps
• LVPECL Reference Voltage, VAC_REF, Available for Capacitive-Coupled Inputs
• Industrial Temperature Range: –40°C to 85°C
• ESD Protection Exceeds 2 kV (HBM)
• Supports 105°C PCB Temperature (Measured with a Thermal Pad)
• Available in 6-mm × 6-mm QFN-40 (RHA) Package

简介

CDCLVP1212属于集成电路（IC）的时钟缓冲器驱动器。由TI制造生产的CDCLVP1212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。