JSMC04AUM1HYAEA-H5I

Rated from -40°C to 85°C, the JSMC04AUM1HYAEA-H5I is the industrial-grade member of Jeju Semiconductor's 4GB eMMC 5.1 line. The wider low-temperature limit is the reason to specify it: the same 32Gb single-die storage and integrated eMMC controller now carry a guaranteed cold-end rating that the commercial -25°C part does not. It arrives in the 153-ball FBGA at 11.5 x 13.0 x 1.0mm, presenting the host with a managed block device while the on-chip controller runs ECC, wear leveling, bad-block handling, and garbage collection.

Key Features

• Industrial -40°C to 85°C - the defining attribute of the -H5I suffix, extending guaranteed operation down to -40°C for equipment in unheated or outdoor enclosures.
• eMMC 5.1 with HS400 - JEDEC-standard interface reaching up to 400MB/s at 200MHz over an 8-bit bus under the 1.7V to 1.95V VCCQ option.
• Dual voltage supply - flash VCC at 2.7V to 3.6V and controller VCCQ at 1.70V to 1.95V or 2.7V to 3.6V, simplified by an internal LDO.
• 4GB usable managed NAND - a single 32Gb die provides 3728MB of user partition space (LBA 0x748000) behind the controller.

Built-in eMMC 5.1 capabilities

Beyond raw storage, the device brings the eMMC 5.1 feature set that embedded designers rely on: Boot and RPMB partitions, command queuing, cache, packed commands, HPI, Secure Erase and Trim, Sanitize, power-off notification, Field Firmware Update, and a Device Health Report for lifecycle monitoring. HS200 and DDR modes remain available for hosts that do not run full HS400 timing, and the part stays backward compatible with earlier eMMC controllers. Secure Write Protection and multiple partition types round out the feature set for systems that separate boot, application, and user data. Note that Large Sector Size (4KB) is not supported, so host formatting should assume the standard 512-byte sector.

Where It Fits

• Industrial automation - PLCs, motor drives, and factory-floor gateways that see sub-zero startups.
• Outdoor and transport electronics - telematics units, digital signage, and metering hardware exposed to cold ambient extremes.
• Rugged embedded computing - edge controllers and remote IoT nodes where the -40°C floor is a hard qualification requirement rather than a nice-to-have.

Why Choose JSMC04AUM1HYAEA-H5I?

The JSMC04AUM1HYAEA-H5I earns its place when a 4GB eMMC has to survive genuine cold, not just cool rooms. Electrically it mirrors its commercial counterpart, with rated sequential throughput of 130MB/s read and 20MB/s write measured under HS400 with cache enabled, so the write path deserves the same design attention while the temperature envelope does the differentiating. Storage without operation spans the same -40°C to 85°C window.

Request pricing, availability, and lead time for the JSMC04AUM1HYAEA-H5I today, and share your target temperature and volume so we can match the right grade to your build.