Intel JS28F128P33TF70: A Comprehensive Technical Overview of the 128-Megabit Parallel NOR Flash Memory
The Intel JS28F128P33TF70 represents a significant component within the landscape of non-volatile memory solutions. As a 128-megabit (16MB) parallel NOR Flash memory device, it is engineered for high-performance applications requiring reliable code storage and execution, often in demanding embedded systems. This overview delves into the key architectural features, operational characteristics, and primary applications of this memory chip.
Fabricated on a 130nm process technology, this device is part of Intel's advanced StrataFlash® embedded memory family. Its core architecture is organized as 16 megabits x 8 or 8 megabits x 16, providing designers with flexibility for interfacing with both 8-bit and 16-bit microprocessors or microcontrollers. A critical advantage of parallel NOR Flash is its support for eXecute-In-Place (XIP) capability. This allows the host processor to run code directly from the flash memory without needing to first copy it into RAM, significantly reducing system latency and simplifying design.
The JS28F128P33TF70 operates on a single 3.0V power supply (VCC) for all read, program, and erase operations. Its access time is a standout feature, with a fast 70ns initial access time and subsequent burst accesses achievable at high speeds. This makes it suitable for systems where rapid data throughput is critical. The interface includes a comprehensive set of control signals—including Chip Enable (CE), Output Enable (OE), Write Enable (WE), and Reset/Deep Power-Down (RST/DPD)—for precise command handling.
For in-system updates, the device offers a highly efficient program and erase functionality. It supports block locking for both volatile and non-volatile protection of critical code sectors, preventing accidental corruption. Programming is performed on a word-by-word basis, while erasure can be executed on larger blocks, which is essential for efficient firmware management. The device also features a Write Protect (WP) pin that provides hardware-level protection for the outermost boot blocks.
Target applications are diverse and often mission-critical. The JS28F128P33TF70 is commonly found in telecommunications infrastructure (routers, switches), networking equipment, industrial automation and control systems, and automotive electronics. Its reliability, endurance, and ability to operate over extended industrial temperature ranges make it a preferred choice for these environments.
ICGOOODFIND: The Intel JS28F128P33TF70 is a robust and high-performance parallel NOR Flash memory solution. Its combination of XIP capability, fast access times, flexible data bus width, and advanced security features solidifies its role as a fundamental component for storing and executing boot code and firmware in a vast array of sophisticated embedded systems.
Keywords: Parallel NOR Flash, Execute-In-Place (XIP), 128-Megabit, StrataFlash, 3.0V Supply.
