7200L20J

Bus Directional:	Uni-Directional
Base Part Number:	7200
Supplier Device Package:	32-PLCC (14x11.46)
Package / Case:	32-LCC (J-Lead)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
FWFT Support:	No
Retransmit Capability:	Yes
Programmable Flags Support:	No
Expansion Type:	Depth, Width
Series:	7200
Current - Supply (Max):	80mA
Voltage - Supply:	4.5V ~ 5.5V
Access Time:	20ns
Data Rate:	33.3MHz
Function:	Asynchronous
Memory Size:	2.25K (256 x 9)
Part Status:	Obsolete
Packaging:	Tube

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Introduction

FIFOs memory, or first-in, first-out memory, is a type of memory in which data is stored and retrieved in the order that it was written. FIFOs, or logic FIFOs, refer to purpose-built devices usually implemented in integrated circuits which effectively incorporate a FIFO memory, as well as the associated logic circuitry required to interface the device to a host data bus. One particular example of this class of memory devices is the 7200L20J device. In this article, we will discuss the application field and working principle of the 7200L20J.

Application Field

The 7200L20J is designed to be used as a logic FIFO device. This device is designed to offer 1, 2, 4 and 8 Mbit x 16 bit architectures with a fast access time of 1.5ns minimum. It is a particularly suitable device when used in high speed system applications where space, power, and cost are critical factors. The 7200L20J is optimized for systems where frequent address or data transfers are required. The 7200L20J is ideal for applications such as high-speed system controllers, compute and storage processors, buses, and embedded systems.

Working Principle

As a logic FIFO device, the 7200L20J is based around a FIFO memory structure. The device is built on a highly integrated, low power and cost-effective 0.18 micron CMOS technology. It features an asynchronous read/write bus and includes FIFO logic for support of data flow between the device and its host bank. The FIFO logic has read and write FIFO pointers that move in opposite directions when data is written and read from the memory IC. The device can also be configured to read data from the FIFO at different speeds, depending on the application. Additionally, the device can provide a range of programmable alarm and modify signal options to signal information of FIFO memory states. When using the 7200L20J device, data bits can be written to the FIFO memory device in either a 16-bit or an 8-bit format. The device can be configured as two independently accessible 8-bit FIFOs, or a single 16-bit FIFO. As data is written to the FIFO device, its write pointer is incremented once for each data word or byte written. When data is read from the device, the read pointer is decremented for each data word or byte read.The device includes a number of control signals and signals to allow the user to manage its operation. The control signals for the read port include RDLECR (Read Enable, Enable erase, Clear, Reset) and RDPRES (Read Present) signals. The control signals for the write port include WRENCR (Write Enable, Enable erase, Clear, Reset) and WRCS (Write Cursor Status) signals. The device also includes a number of status signals to signal FIFO memory states such as Underflow and Overflow. In addition to its FIFO control capabilities, the 7200L20J also includes a number of associated programmable features. These include a busy signal that signals when the device is not ready to accept data or transfer data, a reset signal to signal FIFO initialization and reset, a read signal that signals the FIFO is ready to be read, and a write signal that signals when the FIFO is ready to accept data. The 7200L20J also includes built-in ECC (Error Correction Code) detection and correction capabilities to ensure data accuracy and integrity. In addition, it includes j-bond compliant multi-rate address and data terminals, allowing for easy system expansion and design flexibility.

Conclusion

In conclusion, the 7200L20J is a logic FIFO device designed to offer a range of applications in high speed systems. The device is based on a FIFO memory structure and features a wide range of programmable features, as well as built-in ECC detection and correction capabilities. In addition, the device is optimized for applications requiring frequent address or data transfers, and is ideal for use in controllers, processors, buses, and embedded systems.

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