AT28C17E-20JI

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Memory

AT28C17E-20JI is a 2K-bit CMOS (Complementary Metal Oxide Semiconductor) nonvolatile memory which combines both static and dynamic RAM capabilities in a single chip. It also provides a means to write into the static RAM and to store permanently data information in the non-volatile memory. Its high-speed internal write algorithm and low-power design make it a suitable device for applications such as, but not limited to, remote programmable memory systems, computer peripherals, data loggers, solid-state mass storage options, and other custom nonvolatile memory systems.

Application Field

AT28C17E-20JI is designed for a variety of low-power, low-cost applications that require simple, up-front write control, integrated static memory, complete control of data retention operations, and efficient read and write operations. Common applications for the AT28C17E-20JI include, but are not limited to, programmable memory systems, computer peripherals, data loggers, socketed devices, and other custom nonvolatile memory system applications.

Working Principle

The AT28C17E-20JI is a static RAM with a CMOS nonvolatile memory. It is a 2K-bit device, organized as 128 locations of 16 bits each. Each location is also divided into two 8-bit registers, referred to as A0 and A1. Data is written into the RAM via serial input (Mode 0) or parallel input (Mode 1), and data is stored permanently in nonvolatile memory. Data is accessed by multiplexing address and data on a common bus. The device includes an active low internal write enable pin that allows the user to write into the static RAM and store it into nonvolatile memory.

The AT28C17E-20JI also has a built-in apparatus for efficient data retention control that helps reduce total system power. When power is applied to the chip, the low-power static RAM state is held in check by using automatic refresh circuitry controlled by the device timer. As long as the device is powered, it maintains its stored data without the need for other power sources.

The AT28C17E-20JI is designed for high-speed write operations. It incorporates an advanced write algorithm and read/write detection that provides users with improved write times compared to other nonvolatile memories.

Conclusion

The AT28C17E-20JI is a 2K-bit CMOS nonvolatile memory chip that combines static and dynamic RAM capabilities in a single chip. Its low-power design, internal write algorithm, and read/write detection make it ideal for a variety of low-power, low-cost applications. It is suitable for a wide range of uses including programmable memory systems, computer peripherals, data loggers, and solid-state mass storage options.

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