Rambus XDR(TM) Clock Generator

The CDCD5704 Clock Generator provides the necessary Clock signals to support an XDR memory subsystem and Redwood Logic Interface using a reference Clock input with or without spread-spectrum modulation. Contained in a 28-pin TSSOP package that includes four differential Clock outputs, the CDCD5704 provides an off-the-shelf solution for a broad range of high-performance Interface applications.
The block diagram shows the major components of the CDCD5704 which include a phase-locked loop, a bypass multiplexer, and four differential output Buffers (CLK0 to CLK3). All four outputs CAN be disabled by a logical low at the input of the EN pin. An output is enabled when EN is high and a value of 1 is in its serial Interface Register (RegA-RegD).
The PLL receives a reference Clock input signal, REFCLK, and outputs a Clock signal at a frequency equal to the input frequency times the multiplication factor. The PLL output Clock signal is fed to the differential output Buffers to drive the enabled Clocks Disabled outputs are set to high impedance.
The bypass mode routes the input Clock REFCLK to the differential output Buffers bypassing the PLL
To ensure that the CDCD5704 Clock Generator always performs correctly, the device switches off the PLL and the outputs are in the high-impedance state, once the Clock input is below 10 MHz. If the supply voltage VDD is less than VPUC, all Logic Gates are reset, the PLL is powered down, and the outputs are in the high-impedance state. Therefore, the device only starts its operation if these minimum requirements are met.
Because the CDCD5704 is based on PLL circuitry, it requires a stabilization time to achieve phase-lock of the PLL With use of an external reference Clock this signal must be fixed-frequency and fixed-phase prior to the start of stabilization time.
The device operates from a single 2.5-V supply voltage. The CDCD5704 device is characterized for operation from 0C to 70C.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
CDCD5704PW Texas Instruments Rambus XDR™ Clock Generator 28-TSSOP 0 to 70
CDCD5704PWG4 Texas Instruments Rambus XDR™ Clock Generator 28-TSSOP 0 to 70
CDCD5704PWRG4 Texas Instruments Rambus XDR™ Clock Generator 28-TSSOP 0 to 70
CDCD5704PWR Texas Instruments Rambus XDR™ Clock Generator 28-TSSOP 0 to 70
CDCD5704 's PackagesCDCD5704 's pdf datasheet
CDCD5704PW TSSOP
CDCD5704PWG4 TSSOP
CDCD5704PWR TSSOP
CDCD5704PWRG4 TSSOP




CDCD5704 Pinout, Pinouts
CDCD5704 pinout,Pin out
This is one package pinout of CDCD5704,If you need more pinouts please download CDCD5704's pdf datasheet.

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