DS1225AD-150IND

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DS1225AD-150IND is a member of the DS1225AD milestone series of memory components produced by Dallas Semiconductor. It is an 8-pin, 0.7" wide, nonvolatile, 64K x 8 NMOS RAM chip with an EDO controller. The DS1225AD-150IND has an operating temperature range of -40°C to +85°C and offers high-speed access times as fast as 120 ns.

The DS1225AD-150IND is designed to serve a wide range of applications including data storing memory buffers and non-volatile RAM replacement in PC test and measuring equipment, portable instrumentation, embedded systems, and data acquisition systems. It is developed for designs that need a low-cost and miniature-sized non-volatile memory.

The chip comprises of 32,768 RAM cells, an 8-bit Data Bus, a 16-bit address bus, and 128 bytes of EDO controller that holds 21 registers. The user addressable portion of the memory map is 64K x 8 bits. The chip also features EDO capabilities, like burst-mode read and write cycles which provides the EDO advantage of allowing an access time of 120ns for unlimited cycles for reads and IDS (Initial Access Slot) of 30ns for writes.

The DS1225AD-150IND also has a built-in Write Protect (WP) pin that allows the write operation to be enabled or disabled as per the user’s requirement. The chip’s EDO controller is designed to ensure efficient use of power and memory resources, eliminate contention in the memory system and reduce system access times. The EDO controller also performs a number of internal functions such as copying the contents of a register to other registers, crating bit-wise logic operations, and keeping track of read and write operations.

In terms of performance, the DS1225AD-150IND features high-speed access times of as fast as 120ns and has a 15ns write cycle time. The chip also has a write protect pin for write protection and a standby pin for power saving. The EDO controller in the chip supports burst-mode read and write cycles for speedy access time and unlimited cycles. The chip also supports simultaneous programming and data reads, allowing for fast data transfers.

In conclusion, the DS1225AD-150IND is an 8-pin, 0.7" wide, nonvolatile, 64K x 8 NMOS RAM chip with an EDO controller specifically designed for storing data and non-volatile RAM replacement in PC test and measuring equipment, portable instrumentation, embedded systems, and data acquisition systems. It has an operating temperature range of -40°C to +85°C and offers high-speed access times of 120ns as well as a 15ns write cycle time for writing/reading data, making it suitable for most memory applications.

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