JSMC08AUM3HYAEA-H5

The JSMC08AUM3HYAEA-H5 doubles capacity to 8GB while keeping the single-die construction and eMMC 5.1 controller of Jeju Semiconductor's managed-NAND line. It draws on one 64Gb die to present 7,818,182,656 bytes of user partition space (LBA 0x00E90000), and the commercial version covers the -25°C to 85°C range. Higher density comes with more headroom on the flash side, and the datasheet reflects that: sustained sequential throughput is rated at 240MB/s read and 55MB/s write, both well above the 4GB member of the family.

Key Features

• 8GB in a single 64Gb die - one NAND die behind the controller yields roughly 7.8GB of user space with no die stacking.
• Faster sustained transfers - 240MB/s sequential read and 55MB/s sequential write, measured under HS400 with cache on, give this density a clear throughput edge over the 4GB part.
• eMMC 5.1 with HS400 - up to 400MB/s bus speed at 200MHz over an 8-bit interface using the 1.8V VCCQ option.
• Dual supply design - VCC flash at 2.7V to 3.6V and VCCQ I/O at 1.70V to 1.95V or 2.7V to 3.6V, with an internal LDO for the NAND rail.
• Enhanced user data area in SLC mode - a configurable region can run in SLC mode for higher-integrity storage, at the cost of double the set-up size.

Typical Applications

• Richer embedded operating systems - 8GB comfortably holds a full Linux or Android stack with room for application data.
• Networking and IoT gateways - the stronger write rate suits devices that log telemetry or buffer traffic locally.
• Digital signage and HMI - media assets and UI resources fit alongside firmware on a single managed device.

Unique Advantages

• Capacity-to-cost balance - a single 64Gb die avoids the expense and thickness of stacked constructions while still doubling 4GB density.
• Write-path improvement - at 55MB/s the rated write speed is more than double the 4GB grade, meaningful for log-heavy and update-heavy workloads.
• Full eMMC 5.1 toolkit - command queuing, cache, Boot and RPMB partitions, Sanitize, Secure Erase and Trim, Field Firmware Update, and a Device Health Report are all present.

Why Choose JSMC08AUM3HYAEA-H5?

The JSMC08AUM3HYAEA-H5 is the right pick when 4GB is tight but a stacked high-capacity device is overkill, and when the design runs in a controlled, commercial-temperature environment. It keeps the same footprint and interface as the smaller grade, so moving up in capacity does not force a board change. Note that Large Sector Size (4KB) is not supported; host formatting should use the standard 512-byte sector, and storage without operation is rated across -40°C to 85°C.

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