CDC319DB集成电路（IC）的时钟缓冲器驱动器规格书PDF中文资料

CDC319DB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CDC319DB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。

High-Speed, Low-Skew 1-to-10 Clock Buffer

for SDRAM (Synchronous DRAM) Clock

Buffering Applications

Output Skew, tsk(o), Less Than 250 ps

Pulse Skew, tsk(p), Less Than 500 ps

Supports up to Two Unbuffered SDRAM

DIMMs (Dual Inline Memory Modules)

I2C Serial Interface Provides Individual

Enable Control for Each Output

Operates at 3.3 V

Distributed VCC and Ground Pins Reduce

Switching Noise

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015

Packaged in 28-Pin Shrink Small Outline

(DB) Package

description

The CDC319 is a high-performance clock buffer that distributes one input (A) to 10 outputs (Y) with minimum

skew for clock distribution. The CDC319 operates from a 3.3-V power supply, and is characterized for operation

from 0°C to 70°C.

The device provides a standard mode (100K-bits/s) I2C serial interface for device control. The implementation

is as a slave/receiver. The device address is specified in the I2C device address table. Both of the I2C inputs

(SDATA and SCLOCK) provide integrated pullup resistors (typically 140 kΩ) and are 5-V tolerant.

Three 8-bit I2C registers provide individual enable control for each of the outputs. All outputs default to enabled

at powerup. Each output can be placed in a disabled mode with a low-level output when a low-level control bit

is written to the control register. The registers are write only and must be accessed in sequential order (i.e.,

random access of the registers is not supported).

The CDC319 provides 3-state outputs for testing and debugging purposes. The outputs can be placed in a

high-impedance state via the output-enable (OE) input. When OE is high, all outputs are in the operational state.

When OE is low, the outputs are placed in a high-impedance state. OE provides an integrated pullup resistor.