PI49FCT32805SE

Series:	49FCT
Packaging:	Tube
Part Status:	Obsolete
Type:	Fanout Buffer (Distribution)
Number of Circuits:	2
Ratio - Input:Output:	1:5
Differential - Input:Output:	No/No
Input:	CMOS
Output:	CMOS
Frequency - Max:	133MHz
Voltage - Supply:	2.97 V ~ 3.63 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	49FCT32805

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PI49FCT32805SE Application Field and Working Principle

Clock/Timing – Clock Buffers, Drivers are widely used in most electronic systems for their purpose in powering the oscillator and distributing the clock signals. The PI49FCT32805SE is a commercially available 8-bit clock buffer product from National Semiconductor’s portfolio which is used in many applications like high voltage/high temperature differential I/O, as well as high-speed, high-frequency communication boards.The PI49FCT32805SE, when used in combination with several other semiconductor devices, is capable of providing low voltage, high current drive to the oscillator and distributing equivalent clock signals across several input/outputs of the board. It’s ideal for many types of high speed applications.The PI49FCT32805SE is a clock buffer, driver, and translator module. Its primary purpose is to drive the oscillator and distribute its signals across multiple locations within the system. Its secondary and tertiary output sets also provide fan-out functions and output buffer isolation to protect against transients and other power-related errors. The PI49FCT32805SE is capable of transitioning different I/O\'s ranging from LVPECL, CML, LVDS and SSTL_2 levels, to enable low noise and efficient signal distribution across multiple domains. This National Semiconductor product is an 8-bit, differential clock buffer and line driver with a frequency range of 4.9GHz ( max). Its input type is LVCMOS, while the output types can be specified and customised to either LVCMOS, LVDS, and LVPECL outputs. The PI49FCT32805SE is rated and approved for operation in a temperature range of -40° C to 125° C.

PI 49FCT32805SE Internal Working Principle

The PI49FCT32805SE has an internal operating principle that is rather simple. It consists of an oscillator, a multiplexer, and a pair of voltage-controlled switches, along with an array of current mirror transistors. The oscillator circuit provides the clock signal to the multiplexer. The multiplexer is used for multiple purposes, including the selection of an input signal and the selection of stages 1 through 7, based on the voltage level of the signal.Next, the voltage-controlled switches transition between the input signal and output signal. Depending on which one is selected, one of the switches will either drive, or be driven by, the external differential voltage signal, which is then followed by a current mirror stage. Finally, the current mirror stage outputs the same signal on both ports. The PI49FCT32805SE also features some protections against common power-related issues like over-voltage, in-rush current, and ESD. This provides an additional layer of protection to any system utilizing one.

PI 49FCT32805SE Applications

The PI49FCT32805SE is ideal for applications that require clock distribution over multiple domains. It is primarily used in digital infrastructure for high speed communications, distributed servers, and in embedded systems for microprocessors and DSPs, as it can facilitate signal distribution across multiple domains. The PI49FCT32805SE can also be used in memory intensive applications where maintaining high signal performance and signal quality is essential. Since the device is capable of providing low voltage, high current clock drive even in extreme temperatures, the device is ideal for systems such as those found in automotive or aerospace applications.The PI49FCT32805SE also has wide application in both structured and unstructured communication systems, such as Ethernet, USB, and 1394 networks. With the ability to transition different I/O\'s ranging from LVPECL, CML, LVDS, and SSTL_2 levels, the PI49FCT32805SE is able to provide efficient signal distribution over a wide range of applications.In conclusion, the PI49FCT32805SE is an ideal cost-effective solution for clocking, buffering, and translating multiple signals regardless of which domain they’re used in. The chip’s superior protection features, wide range of output types, and its ability to transition signals makes it a reliable clock buffer and line driver that can be used in many different applications.

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