128Mbit Quad-I/O NOR Flash for 1.8V SPI buses
The Micron MT25QU128ABA8E12-0SIT is a 128Mbit (16M x 8) NOR flash memory that communicates over an SPI bus with Quad I/O support, clocked at up to 133 MHz. This is the part to reach for when a design needs a 1.8V-only serial NOR with the throughput of a quad-lane read — the 133 MHz quad-I/O rate delivers roughly 532 Mbps read bandwidth, enough to shadow-copy code into RAM on a cold boot without waiting on a slower x1 SPI part. The write cycle times are 8 ms for a page program and 2.8 ms for a word program — budget these into the firmware update routine; a full 128 Mbit erase takes several seconds over the quad bus.
Supply rail and temperature grade
This is a strict 1.8 V part — it does not tolerate 3.3 V on VCC, so a separate 1.8 V regulator or a shared rail with other 1.8 V logic is required. ROHS3 compliant per, so it passes the EU RoHS exemption list without lead or restricted halogens — no special handling needed for European or California E-waste regulations.
24-ball TBGA footprint and layout notes
Housed in a 24-ball TBGA (6x8 mm) package, the MT25QU128ABA8E12-0SIT requires a surface-mount footprint with 0.80 mm ball pitch typical for this form factor. The 24-TBGA (6x8) supplier package designation means the die is on a thin substrate with solder balls on the underside — the PCB land pattern must match the Micron recommended footprint for reliable reflow, and the board stack-up should route the SPI signals (CS#, CLK, IO0-IO3) with matched trace lengths to keep skew under 50 ps at 133 MHz. Delivered in tray packaging, not tape-and-reel — this matters for the pick-and-place feeder setup. Tray-fed parts require a tray shaker or manual loading on most assembly lines; confirm the line's tray capability before committing to volume.