JS28F640P30T85A

Memory IC Overview

The JS28F640P30T85A is a 64 Mbit (4M x 16) NOR Flash memory device manufactured by Micron Technology. It operates with asynchronous access times of 70 ns and supports synchronous burst mode operations. The component utilizes a 56-pin TSOP package, specifically identified as PDSO56 in datasheet documentation, with physical dimensions of approximately 14 mm by 20 mm. It functions within a voltage range of 2.7 V to 3.6 V and supports an industrial temperature range from -40 °C to +85 °C.

Memory IC Feature Summary

• Supports both asynchronous read operations and synchronous burst mode for high-speed data transfer.
• Features a compact 56-pin Thin Shrink Small Outline Package (TSOP) suitable for surface-mount applications.
• Provides non-volatile storage with block protection capabilities via the Command User Interface.

Memory IC Applications

• Code execution directly from flash memory (XIP) in embedded systems.
• Storage of firmware and boot code in consumer electronics.
• Data retention in industrial control systems requiring wide temperature stability.

Memory IC Procurement Notes

Verify the specific suffix 'T85A' against official Micron documentation to confirm lead-free status and exact timing characteristics. Ensure compatibility with existing board layouts for the 56-pin TSOP footprint. Confirm that the 2.7V to 3.6V supply voltage aligns with the target system's power rails. Check for RoHS compliance declarations if required by regional regulations.

Memory IC Selection Notes

Select this component when a 64 Mbit capacity with 16-bit data bus width is required. The 70 ns access time suits applications needing moderate-speed random access. The TSOP-56 package offers a balance between pin count and board space. Consider the -40 °C to +85 °C operating range for environments exceeding standard commercial limits.

Memory IC Part Context

This part belongs to the Micron NOR Flash family, designed for parallel interface applications. It shares architectural similarities with other devices in the J3 series, such as the JS28F640J3F75A, though pinouts and electrical specifications may vary. The technology is based on floating-gate cell architecture, allowing for multiple program and erase cycles.

Memory IC Replacement Considerations

The JS28F640P33BF70A is a documented alternative within the same manufacturer's portfolio, offering similar 64 Mbit density and TSOP-56 packaging. Verify pin-to-pin compatibility and ensure that the 70 ns access time meets the system's timing requirements before substitution.