72845LB25PF9

Bus Directional:	Bi-Directional
Supplier Device Package:	128-TQFP (14x20)
Package / Case:	128-LQFP
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
FWFT Support:	No
Retransmit Capability:	No
Programmable Flags Support:	Yes
Expansion Type:	Depth, Width
Series:	7200
Current - Supply (Max):	60mA
Voltage - Supply:	4.5V ~ 5.5V
Access Time:	15ns
Data Rate:	40MHz
Function:	Synchronous
Memory Size:	144K (4K x 18 x 2)
Part Status:	Obsolete
Packaging:	Tray

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Introduction

Logic-FIFOs memory is an important building block for data management in digital systems, for example FIFOs, known as first-in, first-out memories, are used to store and sort data according to the order in which it is received. Along with the development of technology, it is now possible to construct versatile and highly integrated FIFOs in a single chip. The 72845LB25PF9 is a FIFO logic-memory, an integrated device with combination of logic and memory functions. This paper will discuss the application field and working principle of the 72845LB25PF9.

72845LB25PF9 Application Field

The 72845LB25PF9 is often used in digital systems, such as computer memory and communication applications. It can store and process data in digital format, and can be integrated with other logic components (e.g., multiplexers, encoders, and decoders) to perform more complex operations. The 72845LB25PF9 is widely used in communication-based digital systems, such as digital networks, digital telephones, modems, and electronic mail. It enables the buffers for data flow control, allowing such systems to match the data flow rate of the sender with the receiver\'s data rate. In terms of computer memory, the 72845LB25PF9 is often used in systems with multiple processors. It provides a reliable and efficient way to maintain data synchronization and locks between the different processors. Furthermore, it also can be used in video systems as memory for storing video frames. In applications with multiple modules or complex data processes, the 72845LB25PF9 can be used for buffering and filtering data streams, reducing the need for extra copies of data, thus increasing the efficiency of the system. In addition, it can be connected with microprocessors, digital-signal processors, and embedded systems to expand the memory size and alleviate the high cost of large capacity memories.

72845LB25PF9 Working Principle

The 72845LB25PF9 is based on FIFOs (First-In, First-Out) memory, which is a type of memory that stores and sorts data in a sequential manner. The data is stored in a queue and the oldest data is accessed and processed first, according to the rule of FIFO (First-In, First-Out). The FIFO memory operates based on push and pop operations. In the push operation, the data is written into the memory and stored in a linear array (or queue). In the pop operation, the oldest data is removed from the memory. The 72845LB25PF9 is a sophisticated FIFO logic-memory integrated device that comprises of a FIFO portion, a static random access memory (SRAM) port, a systems control port, and a multiplexer. The FIFO portion of the device has a two-port memory structure. It has two input ports where the data is pushed in sequentially and two output ports from where the data is popped out in the same sequence. The SRAM port allows the user to configure the size of the memory array and control the FIFO operations. The systems control port allows two-way communication between the FIFO and the systems. It is responsible for flow control, address generation, write and read cycle control, data synchronization, and error detection. The multiplexer is used to select the data output port, direction of data flow and the control signals.

Conclusion

The 72845LB25PF9 is a advanced logic-FIFOs memory integrated device. It is most often used in communication-based digital systems, such as digital networks, digital telephones, modems, and electronic mail and in computer systems where multiple processors are operating. The 72845LB25PF9 operates based on FIFOs memory, in which data is stored and sorted in a queue based on the first-in, first-out principle. The device also comprises of a SRAM port, a systems control port, and a multiplexer.

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