256 Mbit NOR Flash with Quad I/O — what it means for the bus
The Micron MT25QL256ABA8E12-1SIT TR is a 256 Mbit NOR Flash memory organized as 32M x 8 bits, communicating over an SPI interface with Quad I/O support at a clock frequency of 133 MHz. This part is built for code shadowing, parameter storage, and data logging in embedded systems where the host processor boots or executes directly from the Flash. The Quad I/O capability allows four data lines to operate simultaneously, quadrupling the read throughput compared to single-bit SPI without adding extra package pins — a practical advantage when the MCU or FPGA bus is already pin-limited. The memory is non-volatile and retains data without power. Supply voltage range is 2.7 V to 3.6 V. Operating temperature spans -40°C to 85°C.
133 MHz clock — timing margin for the read path
The SPI clock frequency is 133 MHz. Page write cycle time is 2.8 ms; word write is 8 ms.
Package and mounting — 24-TBGA footprint
The device comes in a 24-ball Thin Ball Grid Array (24-TBGA) with a body size of 6 mm x 8 mm (supplier device package 24-T-PBGA). The BGA footprint requires a solder-paste stencil and reflow profile — not a hand-solderable package. Mounting is surface-mount only. The tape-and-reel (TR) and cut-tape (CT) options are available for volume pick-and-place or prototype quantities, respectively.
Lifecycle and compliance
The MT25QL256ABA8E12-1SIT TR is listed as Active in production status and is RoHS3 compliant. No end-of-life notice or last-time-buy date is associated with this order code. It is currently sourced through independent distribution and is quoted to order against an RFQ — availability and current pricing are confirmed at quote time.