Introduction

CY7C4241V-15JC, belonging to the FIFOs (first-in-first-out) Memory class known as a dual-port RAM, is a high-performance 32K x 9-bit asynchronous FIFO memory, similar to a double-stage shift register that is made up of non-volatile 220nm quadruple metal RAM technology. It is a true dual-port, independent RAM; one port is used as an data input port and the other one is used as a data output port. CY7C4241V-15JC is well suited for use in logic-intensive applications like Telecommunications, Data Acquisition, High-Speed Computing, and many more.

Application Field

CY7C4241V-15JC provides clock synchronization in data flow channels and is widely used in commercial, industrial, medical, aerospace and other fields. Its serial port and control pins simplify the timing and control signals, simplify design and reduce cost. CY7C4241V-15JC has saved lots of time and cost during transmission and reception.

CY7C4241V-15JC has two timing clocks, one for the input interface and another one for the output interface, which can support data rate up to 56 Mbits/sec. It is also 8-bit wide, 9-bit deep, without edge control. The common data width is 5 to 9 bits, with a read/write operation of one clock cycle.

In Telecommunications, the most common application scenario of CY7C4241V-15JC is in XDSL systems. The input stream is sampled and stored in the FIFO for transmission, avoiding possible data loss due to the rate mismatch between input and output.

In Data Acquisition, CY7C4241V-15JC FIFO Memory is important in transient data capture where data is rapidly acquired and then stored until further data analysis can be made.

In High-Speed Computing, CY7C4241V-15JC is the key component of the buffer memory in many workstations and servers. It is used to buffer data between the processor and memory so that the bottleneck in the speed of processing data can be eliminated.

Working Principle

When data is transferred from the input port to the output port of the FIFO memory, in other words from the input clock interface to the output clock interface, the data bus is blocked by a signal line connected to the two clock interfaces. This implies that the input can be written into and the output can be read from this memory device simultaneously at any given time and is independent from the input clock\'s frequency fluctuations. This is due to the double-stage shift register feature of the CY7C4241V-15JC.

Due to the double buffering feature, when the data flow rate of the input clock interface is faster than that of the output clock interface, the input port will write data into the FIFO Memory (block buffer) until it is full, and then transition to the output port to read the data out, using the clock of the output port. Moreover, when the data flow rate of the output clock is faster than that of the input port, the output port will read the data out faster, and the data of the input port will be stored in the double-buffered structure until the output port runs out of data and then transition back to the input port, using the clock of the input port.

Internally, CY7C4241V-15JC consists of two 13-bit FIFO hub and four 32-bit data FIFO clusters, providing a total of 64Kbits of FIFO memory. Each 13-bit FIFO hub consists of two 32-bit array of six parallels connected with two 13-bit data poles, which allows for cycle level synchronization.

In summary, CY7C4241V-15JC is a 32K x 9-bit non-volatile FIFO memory which is an ideal circuitry structure used in an array of applications. The buffer memory saves lots of time and cost during data transmission and reception and its serial interface and control pins significantly simplifies the design and reduces cost.