M29W800DT-70N6E

The M29W800DT-70N6E is the extended-temperature (-40°C to +125°C) version of STMicroelectronics’ 8Mbit 3V dual-organization top-boot NOR Flash memory. Designed for high-reliability applications in extreme thermal environments, this device ensures full electrical specifications — including 70ns access time — are maintained across the entire -40°C to +125°C operating temperature range. The ‘E’ grade represents enhanced characterization and screening compared to standard industrial grade devices, making it suitable for automotive powertrain, under-hood electronics, aerospace, and high-temperature industrial applications. The device features dual x8/x16 organization (selectable via BYTE# pin) and top boot block architecture, with a total of 19 blocks of varying sizes (64KB main blocks plus parameter and boot blocks at the top address range). All the advanced features of the standard version are retained: Write to Buffer for fast programming, Program/Erase Suspend and Resume, status register monitoring, and hardware block protection. The 48-pin TSOP Type N package provides a compact surface-mount form factor. With 100,000 program/erase cycles and 10-year data retention at elevated temperatures, the M29W800DT-70N6E meets the stringent reliability requirements of automotive electronics (AEC-Q100), industrial automation, aerospace systems, and other mission-critical applications operating in extreme thermal environments.

The M29W800DT-70N6E operates on the same NOR Flash floating gate principle as the standard temperature version, but with enhanced process characterization and qualification for extended -40°C to +125°C operation. At the cell level, data is stored as charge on floating gates surrounded by silicon dioxide insulation. The extended temperature device uses optimized oxide quality and charge trapping characteristics to maintain data integrity at high temperatures, where thermal energy can accelerate charge leakage from the floating gate. The 10-year data retention specification is guaranteed even at 125°C, requiring lower intrinsic leakage rates than standard temperature grade devices. Read access time (70ns) is guaranteed at the maximum operating temperature of 125°C, despite transistor mobility decreasing and interconnect resistance increasing at high temperatures. At the low-temperature end (-40°C), program and erase operations are carefully characterized because tunneling currents and charge transfer efficiency decrease at lower temperatures. The on-chip charge pumps that generate program and erase voltages are designed for stable operation across the full temperature and supply voltage range. The extended temperature device undergoes additional quality screening including high-temperature operating life (HTOL) testing, temperature cycling, and burn-in to ensure reliability in the field. Functionally, the device is identical to the standard grade: it supports x8 and x16 modes via BYTE#, has top boot architecture with 19 independently erasable blocks, supports Write to Buffer for fast programming, Program/Erase Suspend/Resume, and provides a status register for operation monitoring. The top boot architecture places the boot block at the highest addresses, compatible with PowerPC and other RISC processors that start execution from the upper memory map.

• Automotive engine and transmission controllers
• Under-hood body and chassis modules
• Industrial servo and motor drives
• Down-hole drilling and logging tools
• Avionics and spacecraft electronics
• Military and defense systems
• Outdoor telecom baseband units
• Smart grid and substation equipment