CDC319DBR屬于集成電路（IC）的時鐘緩沖器驅動器。由美國德州儀器公司制造生產(chǎn)的CDC319DBR時鐘緩沖器，驅動器時鐘緩沖器和驅動器集成電路產(chǎn)品族中的產(chǎn)品用于幫助信號在系統(tǒng)中傳輸，常用作頻率/時間參考信號，以同步系統(tǒng)內(nèi)的活動。盡管這些器件最常用到的功能就是緩沖（即，為使信號不受驅動負載的影響而從某個信號源復制信號），但是該產(chǎn)品族中的某些器件還能執(zhí)行其他功能，例如選擇性改變緩沖信號路徑、按某個整數(shù)值分割信號頻率，或進行所用電信號格式轉換。

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.