AT28HC256-12PI

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Memory Type:	Non-Volatile
Memory Format:	EEPROM
Technology:	EEPROM
Memory Size:	256Kb (32K x 8)
Write Cycle Time - Word, Page:	10ms
Access Time:	120ns
Memory Interface:	Parallel
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C (TC)
Mounting Type:	Through Hole
Package / Case:	28-DIP (0.600", 15.24mm)
Supplier Device Package:	28-PDIP
Base Part Number:	AT28HC256

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Memory

AT28HC256-12PI is a high-performance CMOS 8K × 8 IN-SYSTEM PROGRAMMABLE PROM which combines the excellent characteristics of low power, low cost and superior quality with a highspeed access time of 10ns. It is intended to provide a viable replacement for the higher power, higher cost and longer access time EPROM devices. The device is organized as 128K words of 8 bits each. Housed in a 28-pin SO or PLCC, the device employs a fast access time 2-wire serial bus (SPI bus).

AT28HC256-12PI has been widely used in the fields requiring low cost, low power, and high quality. For example, it can be used for Intelligent consumer and industrial electronics, Automotive electronics, Portable electronics, and Home and office networks, etc. Besides, it can also be used in programmable logic controller (PLC), FPGA, and other memory associates equipments.

AT28HC256-12PI works based on the SPI bus serial access protocol. SPI stands for Serial Peripheral Interface, and is a type of serial interface that adheres to a strictly defined standard protocol, which enables a low/medium speed serial communication of control and data. This protocol allows devices to communicate with SPI devices in real-time by sending data in small packets over a shared serial bus. As the serial communication protocol is so well defined, no further development or reworking is needed to enable the integration of new components or enable legacy systems to work under the SPI protocol.

SPI is well suited for applications requiring low-bandwidth communication between ICs. It provides a relatively low speed yet effective means of communication between two or more digital devices with as little as three wires (data, clock, and chip select). One of the benefits of SPI is the simplicity of configuration, since a single line is used for both data reception and transmission from the peripherals. When configuring an SPI interface, the master device is responsible for the synchronization of data exchange and the slave devices transfer and receive data according to the syllabus which is defined by the master device.

In terms of usage and compatibility, AT28HC256-12PI’s SPI bus protocol makes it highly versatile. It can be used with a wide variety of microcontrollers, FPGAs, and other digital devices. Its low power consumption further enhances its versatility and makes it suitable for low-power embedded applications. Moreover, since the data transfers between the devices over the SPI bus are relatively low speed, the cost of this device is kept low, thus making it an ideal choice for a variety of low-cost applications.

In terms of technical specifications, AT28HC256-12PI has a wide variety of features, such as a fast access time of 10ns, low voltage support (2.7V to 3.6V), low-power consumption, two I/O ports, a wide operating temperature range from -40°C to 85°C, multiple chip enable and write protect functions, among others. It is also available in 8-pin SO or 28-pin PLCC packages, making it usable with a variety of configurations and application designs. In terms of built-in-security, the included chip enable and write protect functions enable the AT28HC256-12PI to protect the stored data while providing performance and reliability.

In conclusion, AT28HC256-12PI is a great choice for applications that require low power, low cost, and excellent quality performance. With its high-speed access time of 10ns, low power consumption, multiple chip enable and write protect functions, and a wide variety of options for packaging, AT28HC256-12PI is an ideal choice for a variety of low-cost, low-power embedded applications.

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