7203L20TDB

Logic - FIFOs Memory: 7203L20TDB Application Field and Working Principle

7203L20TDB is a state-of-the-art FIFO (First-In, First-Out) Logic Memories product from Allegro MicroSystems. It is a dual-ported, dual-bank memory consisting of 1 Kb of dynamic FIFO memory that operates from a single +3.3 V supply. The 7203L20TDB is perfect for interfacing with any kind of serial communications protocol, such as 10/100Base-T, USB-2.0, or IEEE-1394a. It is capable of operating at up to 8 Mbps without additional clocking circuits, allowing designers to develop with higher-speed serial protocols.

Application Fields

The 7203L20TDB is well-suited for applications that require high-speed serial data buffering, with specific applications including digital video cameras, set-top boxes, video conferencing systems, industrial controllers, medical instrumentation, and ethernet-based design systems.

In digital video cameras, it can be used to connect the camera module to the high-speed serial link of the main unit. The FIFO\'s dual-bank architecture prevents data overrun/underrun in both directions, increasing camera performance and enabling transmission of uncompressed high-resolution images. In set-top boxes, the 7203L20TDB can be used to buffer the data between the main unit and the decoder circuit, eliminating data overrun errors and ensuring smooth transmission. In video conferencing and streaming applications, the FIFO can help balance the PC interface to the cameras, providing improved picture quality at higher bit rates.

Working Principle of 7203L20TDB

The 7203L20TDB design is based upon the concept of a First-In, First-Out (FIFO) buffer in which data is read from the same location it is written. The 7203L20TDB consists of two 512-byte banks, each accessed by its own address and data port. The first bank stores the data that is continuously read by the receiving device, while the second bank stores additional data that is prepared for transmission. This allows for simultaneous filling and emptying of the memory, eliminating the possibility of data overrun, underrun, or corrupt data.

The 7203L20TDB operates in either single-port or dual-port modes, depending on the application. In single-port mode, all of the data is written to and retrieved from the first memory bank. When in dual-port mode, the data is written to the first bank and read from the second bank. This allows for tight coupling of the transmitting and receiving devices reducing latency, and allowing for high-speed data streaming.

Features of 7203L20TDB

The 7203L20TDB has several features that make it useful for high-speed applications. First, it has a very fast access time of 6 ns, which makes it suitable for operations in high-speed serial protocols. Second, the device has built-in error checking circuitry that can detect data corruption or errors in transmission. It also has two separate address and data ports with individual write and read strobes, allowing simultaneous read and write operations. finally, it has a built-in 8-bit error code detect circuit, which will indicate which type of error occurred if an error is detected.

The 7203L20TDB is an ideal solution for high-speed serial data buffering. It is well-suited for applications requiring quick, reliable access time with low power consumption. The embedded error correction circuitry ensures data integrity, while the two separate port configuration allows for tight coupling of the transmitting and receiving devices. With its small form factor and low cost, it is an excellent choice for cost-sensitive applications.