CDCLVD1208RHDR集成电路（IC）的时钟缓冲器驱动器规格书PDF中文资料

CDCLVD1208RHDR属于集成电路（IC）的时钟缓冲器驱动器。由德州仪器制造生产的CDCLVD1208RHDR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。

1 Features

1• 2:8 Differential Buffer

• Low Additive Jitter: < 300-fs RMS in 10-kHz to

20-MHz

• Low Output Skew of 45 ps (Maximum)

• Universal Inputs Accept LVDS, LVPECL, and

LVCMOS

• Selectable Clock Inputs Through Control Pin

• 8 LVDS Outputs, ANSI EIA/TIA-644A Standard

Compatible

• Clock Frequency: Up to 800 MHz

• Device Power Supply: 2.375 V to 2.625 V

• LVDS Reference Voltage, VAC_REF, Available for

Capacitive Coupled Inputs

• Industrial Temperature Range: –40°C to 85°C

• Packaged in 5-mm × 5-mm, 28-Pin VQFN (RHD)

• ESD Protection Exceeds 3-kV HBM, 1-kV CDM

2 Applications

• Telecommunications and Networking

• Medical Imaging

• Test and Measurement Equipment

• Wireless Communications

• General-Purpose Clocking

3 Description

The CDCLVD1208 clock buffer distributes one of two

selectable clock inputs (IN0 and IN1) to 8 pairs of

differential LVDS clock outputs (OUT0 through OUT7)

with minimum skew for clock distribution. The

CDCLVD1208 can accept two clock sources into an

input multiplexer. The inputs can either be LVDS,

LVPECL, or LVCMOS.

The CDCLVD1208 is specifically designed for driving

50-Ω transmission lines. In case of driving the inputs

in single-ended mode, the appropriate bias voltage,

VAC_REF, must be applied to the unused negative

input pin.

The IN_SEL pin selects the input which is routed to

the outputs. If this pin is left open, it disables the

outputs (static). The part supports a fail-safe function.

The device incorporates an input hysteresis which

prevents random oscillation of the outputs in the

absence of an input signal.

The device operates in 2.5-V supply environment and

is characterized from –40°C to 85°C (ambient

temperature). The CDCLVD1208 is packaged in

small, 28-pin, 5-mm × 5-mm VQFN package.