IS42S16320D-7BL

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Introduction

The IS42S16320D-7BL is from a family of fast, low-power synchronous DRAM devices with 32M bits of organization, high-speed MBUS interface and burst lengths of eight, four and two data pieces. It is widely used in telecom and networking applications.

Application Fields

The IS42S16320D-7BL is ideal for memory intensive applications such as telecom equipment, routers, switches, servers, network interface cards, computer peripherals, DSPs and base station infrastructure. Additionally, it can be used for data buffering, caching, and system memory.

Working Principle

The IS42S16320D-7BL is a synchronous dynamic random access memory (SDRAM) device, which means that all the operations and data transfers are synchronized to the internal clock. It uses an 8-bit wide data bus, but can be operated in a burst mode of four and two. The application can specify an address and a starting burst count, and the SDRAM device will read/write the specified number of data pieces, padding the unused portions with "dummy" data as necessary.

The device has two parts: the synchronous DRAM core, and the control logic. The control logic handles the synchronous transfers of data between the application and the device. The synchronous DRAM core is responsible for the actual storage of data and consists of a large array of memory cells, a row decoder and a column decoder. The row decoder is responsible for selecting the correct row, while the column decoder is used to accessing individual data pieces from the selected row.

Each row contains 32Kbits in 8K addresses. Data is read/written in 8-bit words, and transfers occur in a burst mode of four and two, as specified by the application. Data transfers are synchronized to the internal clock. The device has an auto-refresh feature, which periodically refreshes the stored data to prevent data loss.

Conclusion

The IS42S16320D-7BL is a fast, low-power synchronous DRAM device with 32M bit organization. It is suitable for telecom and networking applications, such as routers, switches, servers, and network interface cards. The device has a synchronous DRAM core and control logic which handle synchronous data transfers between the application and the device. Data is read/written in 8-bit words in a burst mode of four and two, and data transfers are synchronized to the internal clock.

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