128 Mbit NOR Flash for automotive code storage
The Micron MT25QU128ABA8E12-0AAT is a 128 Mbit NOR Flash memory organized as 16M x 8, using the Quad SPI interface for read and program operations. It runs at a clock frequency of 133 MHz, which gives a practical read throughput sufficient for execute-in-place (XIP) firmware in automotive ECUs, ADAS modules, and transmission controllers. The part is qualified to AEC-Q100, meaning it has passed the stress tests required for automotive-grade components — a non-negotiable for any production BOM that leaves the prototype bench.
Quad SPI interface — why it matters for boot time
Quad I/O SPI reads four bits per clock cycle at 133 MHz. Page program time is 2.8 ms typical; sector erase is 8 ms typical.
Package and mounting — 24-TBGA layout considerations
The 24-TBGA (6x8 mm body) is a fine-pitch BGA that requires controlled impedance traces on the PCB for the SPI lines, especially at 133 MHz. X-ray inspection after reflow is recommended to catch voiding under the balls. The package is surface-mount only; no socket option exists for this footprint, so plan for a programming fixture or in-system programming via the SPI header during board-level test.