X20C16SI-35

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The X20C16SI-35 is a 16K x 8 bit NVSRAM memory device used in many embedded systems and industrial applications today. It is a serial-based non-volatile memory, meaning that it will retain its contents even when power is removed. This makes it well suited for a variety of applications such as controlling industrial equipment, retaining system configurations, and powering up quickly.

Device Overview

The X20C16SI-35 has a small form factor of 8.15 x 8.25mm, making it extremely compact and well suited for use in tight spaces. It has a maximum read/write cycle time of 300ns and is capable of storing up to 16K words of non-volatile data. Data is stored using two input/output pins and a Chip Select pin.

Application Field

The X20C16SI-35 has a wide range of applications due to its features and capabilities. These include:

• Industrial Control and Equipment Maintenance: The X20C16SI-35 is ideal for industrial control applications since it is able to retain its contents even when power is removed. Its fast cycle time makes it suitable for applications such as controlling motor drives, controlling pumps, or storing equipment settings.
• System Configuration Retention: The X20C16SI-35 is particularly suitable for embedded systems and applications which require their configuration to be retained, even when power is removed. This could include things like configuring system-level peripherals or retaining software settings.
• Quick Boot-Up: The X20C16SI-35 can be used to power up quickly, where non-volatile data is loaded into system RAM at boot-up. This can allow applications to start quickly, without the need for a lengthy re-initialisation process.

Working Principle

The X20C16SI-35 is a serial-based non-volatile RAM and uses a protocol known as SPI (Serial Peripheral Interface) to communicate with. This is a synchronous serial protocol which uses a master (microprocessor or microcontroller) and a slave device (the X20C16SI-35). The master will initiate a transaction on the bus, by sending a command in the form of four bytes, followed by data. The slave will respond by sending back a response, which can be either an acknowledgement or data.

The X20C16SI-35 is divided into 16K segments and each segment is 128 words in size. The data is read or written in 4-byte chunks and data locations are specified by the command byte sent by the master. In addition, the X20C16SI-35 also has special command bytes which allow for a range of functions, such as device erase, sector erase, and sector protect.

The X20C16SI-35 has a range of features which make it well suited to many applications. These include fast access times, low power consumption, reliability, and a wide operating temperature range. The device also offers advanced data security features, such as individual block lockout and sector locking, which can help to protect sensitive information.

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