S29GL064N90FFA040 64Mbit NOR Flash Memory

ElecSuppliers Part Number GuideAug 22, 2026

S29GL064N90FFA040 is a 64Mbit parallel NOR Flash memory from the S29GL064N family, originally associated with Spansion and now part of the Infineon memory portfolio. The device is designed for non-volatile code and data storage in embedded electronic systems.

With a 90 ns access time and a 3 V-class supply, the S29GL064N family was developed for systems requiring relatively fast asynchronous Flash access without the complexity of a high-speed serial memory interface.

The exact suffix is important because S29GL064N devices are available in different package, temperature, protection and boot-sector configurations.

S29GL064N90FFA040 Key Specifications

S29GL064N90FFA040 belongs to the 64Mbit S29GL064N NOR Flash family. The memory provides 8M × 8 or 4M × 16 organization and uses a parallel interface.

The device operates from a 2.7 V to 3.6 V supply range, with 3 V nominal operation. Its initial access time is 90 ns, while the page access time is faster.

The memory supports both x8 and x16 data-bus configurations, giving designers flexibility when integrating it with existing processors and embedded controllers.

The device is designed for industrial-temperature operation, with a range of approximately -40°C to +85°C.

64Mbit Parallel NOR Flash

A 64Mbit Flash device provides 8 MB of non-volatile memory capacity.

Unlike volatile RAM, NOR Flash retains stored information when system power is removed. This makes it suitable for storing firmware, boot code, configuration information and other data that must remain available after a system restart.

The parallel interface is particularly relevant to older and established embedded architectures where the processor or controller provides a dedicated external memory bus.

For systems originally designed around parallel NOR Flash, maintaining the same bus architecture can simplify firmware migration and hardware replacement.

S29GL064N90FFA040 90ns Access Time

The 90 ns speed grade is one of the defining characteristics of S29GL064N90FFA040.

Access time represents the delay between a valid memory address being presented to the device and the corresponding data becoming available.

A 90 ns NOR Flash device is suitable for many embedded processors and controllers that use asynchronous external memory interfaces. The appropriate speed grade still depends on the processor's memory timing requirements, including address setup, data setup and hold times.

Designers should therefore compare the complete memory timing specifications rather than selecting a Flash device based only on the headline access-time number.

MirrorBit NOR Flash Technology

The S29GL064N family uses MirrorBit technology.

This technology was developed for high-density non-volatile Flash memory and forms part of the architecture behind the S29GL family.

The memory provides sector-based erase and programming operations, allowing firmware and data to be managed without requiring the entire memory array to be erased at once.

This is particularly useful for embedded systems where different sections of Flash may contain boot firmware, application code, configuration information or other data.

S29GL064N Memory Organization

The S29GL064N architecture supports both x8 and x16 operation.

In x8 mode, the memory is organized as 8M × 8. In x16 mode, the organization becomes 4M × 16.

This flexibility allows the same basic Flash family to be integrated into systems using different external memory-bus widths.

The device also incorporates page-mode read capabilities and write-buffer programming features designed to improve data-transfer and programming efficiency compared with purely single-word programming.

S29GL064N Sector Architecture

The S29GL064N family uses a sector-based architecture.

Flash memory normally requires an erase operation before previously programmed locations can be rewritten. Sector-based organization allows a specific region of memory to be erased without unnecessarily disturbing other stored information.

The family also provides sector protection features intended to prevent accidental modification of protected areas.

For embedded products, this can be useful for protecting boot code or other critical firmware from unintended erase or program commands.

S29GL064N90FFA040 Applications

S29GL064N90FFA040 can be used for firmware and non-volatile data storage in embedded electronic systems.

Typical applications for this class of parallel NOR Flash include industrial controllers, communication equipment, networking hardware, instrumentation, embedded computing platforms and legacy processor-based systems.

The 64Mbit capacity is suitable for applications requiring more storage than small serial Flash devices while retaining a conventional parallel memory interface.

Firmware storage is one of the most common applications. The Flash can contain boot software, operating firmware, device configuration information and application code.

S29GL064N90FFA040 Package Considerations

The S29GL064N family was offered in multiple package configurations.

The suffix of the complete part number determines the package and other ordering characteristics. This is particularly important for S29GL064N90FFA040 because visually similar S29GL064N devices may use TSOP or FBGA packaging.

When replacing an existing Flash device, engineers should verify the exact package dimensions, pinout and PCB footprint.

A replacement from the same memory family is not necessarily a drop-in replacement if its package or pin configuration differs.

S29GL064N90FFA040 Replacement

When searching for a replacement, engineers should first confirm the memory density, interface type, bus width, access time and operating voltage.

The 64Mbit capacity and 90 ns speed grade are important starting points, but they are not the only compatibility requirements.

The package suffix, temperature range, boot-sector configuration and protection features should also be checked.

This is especially important when replacing older Spansion or Cypress Flash devices because the same base S29GL064N designation covers multiple variants.

S29GL064N90FFA040 Lifecycle

An important consideration for this part number is lifecycle status.

Current distributor and manufacturer information identifies S29GL064N family variants such as S29GL064N90BFI040 and S29GL064N90TFI040 as obsolete or discontinued.

This means S29GL064N90FFA040 should be treated as a legacy component when planning new production. Existing equipment may still require the exact part for maintenance, repair or long-term support.

For new designs, engineers should evaluate currently supported NOR Flash alternatives rather than automatically designing around an obsolete device.

S29GL064N90FFA040 for Legacy Embedded Systems

S29GL064N90FFA040 represents a generation of high-density parallel NOR Flash designed around a 3 V memory bus, 90 ns access time and x8/x16 operation.

Its 64Mbit capacity makes it suitable for firmware and data storage in embedded systems that still depend on parallel Flash architecture.

For replacement projects, the complete part number should be verified carefully, particularly the package and suffix configuration. For new designs, lifecycle status should be considered from the beginning so that future component availability does not become a production problem.