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 k) 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.

• 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

• Function
• Single-ended
• Output frequency (Max) (MHz)
• 100
• Number of outputs
• 10
• Output supply voltage (V)
• 3.3
• Core supply voltage (V)
• 3.3
• Output skew (ps)
• 250
• Features
• I2C interface
• Operating temperature range (C)
• 0 to 70
• Rating
• Catalog
• Output type
• LVTTL
• Input type
• LVTTL

CDC319的完整型号有：CDC319DB、CDC319DBR，以下是这些产品的关键参数及官网采购报价：

CDC319DB，工作温度：0 to 70，封装：SSOP (DB)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CDC319DB的批量USD价格：4.579（1000+）

CDC319DBR，工作温度：0 to 70，封装：SSOP (DB)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CDC319DBR的批量USD价格：3.874（1000+）

CDC319 IBIS Model

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