MT25QU256ABA8E12-0AUT - 256Mbit SPI NOR Flash 166MHz | Micron
MPN: MT25QU256ABA8E12-0AUT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.46 | $2,230.00 |
| 1,000 | $3.95 | $3,950.00 |
Drop-in alternatives for MT25QU256ABA8E12-0AUT β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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MT25QL256ABA8E12-0AUT
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MT25QU256ABA8E12-0AUT Maximum Ratings & Electrical Characteristics
| Memory Type | NOR Flash - Serial (SPI) |
| Density | 256 Mbit (32 MB) |
| Interface | SPI - Quad I/O |
| Max Clock Frequency | 166 MHz |
| Access Time | 5 ns |
| Supply Voltage | 1.8 V (1.70 V to 2.00 V) |
| Organization | 64M x4 (TLBGA ballout) |
| Package | 24-T-PBGA (6x8 mm) |
| Mounting Type | Surface Mount |
| Grade | Automotive (-AUT ordering code) |
MT25QU256ABA8E12-0AUT 24-t-pbga (6x8 mm) Pin Configuration Guide
Complete pinout information for MT25QU256ABA8E12-0AUT (24-t-pbga (6x8 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MT25QU256ABA8E12-0AUT.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
MT25QU256ABA8E12-0AUT is suitable for 6 applications: Automotive ECU Boot and Firmware Storage, MCU/SoC External Code Storage (XIP), Industrial Controllers and PLC Firmware, Networking Equipment Configuration Storage, Over-the-Air (OTA) Update Storage, Embedded Logging and Data Retention.
Automotive ECU Boot and Firmware Storage
The MT25QU256ABA8E12-0AUT fits automotive ECU boot-flash roles because its -AUT ordering code denotes Micron's automotive-grade serial NOR flow, and its 256Mbit density comfortably holds bootloader, application firmware, and dual-bank OTA update images for MCUs and SoCs. The 166 MHz Quad-SPI interface delivers up to roughly 662 Mbps of effective read bandwidth, shortening boot time compared with single-lane SPI NOR at lower clocks. In a typical topology the device hangs off the host processor's QSPI controller for execute-in-place (XIP) or shadow-boot operation, with 1.8V I/O matching low-voltage processor banks. The trade-off is verifying write endurance and retention for the automotive duty cycle against the official Micron datasheet before release.
Recommended
MCU/SoC External Code Storage (XIP)
Embedded systems running large RTOS or Linux images use the MT25QU256ABA8E12-0AUT as external execute-in-place code storage on the Quad-SPI bus. Its 5 ns access time and 166 MHz quad clock let the host fetch code with minimal stall penalty, and the 1.70V-2.00V supply range matches modern low-voltage memory I/O banks, avoiding level shifters. Designers typically enable the controller's XIP mode with quad output reads and rely on hardware write-protect plus the status register for boot integrity. The performance consideration is PCB signal integrity at 166 MHz: matched trace lengths and solid ground return on the clock line are required, and read margins should be validated across the full temperature range of the target environment.
Recommended
Industrial Controllers and PLC Firmware
Industrial controllers, PLCs, and motor-drive units store firmware, parameter sets, and calibration tables in the MT25QU256ABA8E12-0AUT. The 32MB capacity supports multi-image firmware schemes with rollback protection, and the SPI bus consumes only a few board nets, freeing routing resources on dense control boards. Its broad industrial relevance is reflected in distributor positioning of the MT25QU256 family for industrial controllers and computing modules. In practice the flash is wired to the main MCU QSPI interface with 10K pull-ups on hold/reset lines to prevent floating-pin corruption during brownouts. Designers should budget erase/program times from the datasheet into field-update windows and implement wear-leveling if parameters are rewritten frequently.
Recommended
Networking Equipment Configuration Storage
Routers, switches, and base-station line cards use the MT25QU256ABA8E12-0AUT to store boot code, device configuration, and event logs. The 256Mbit density covers dual-firmware schemes plus logging space, while the Quad-SPI 166 MHz interface keeps boot and config-load latency low during hot-restart scenarios. The 24-ball 6x8 mm TBGA footprint is significantly more compact than parallel NOR alternatives, easing layout on high-density line cards. The engineering trade-off is that quad-mode signal integrity matters more as trace length grows on larger boards - series termination on clock and data lines is recommended. Micron positions this family explicitly for networking and computing module storage roles.
Recommended
Over-the-Air (OTA) Update Storage
Connected automotive and IoT devices need to stage a complete replacement firmware image before committing the update, and the MT25QU256ABA8E12-0AUT's 32MB capacity supports true dual-image OTA with rollback. Its 1.8V operation suits battery-powered telematics and sensor nodes, and the -AUT grade addresses automotive OTA reliability expectations for ECUs subject to field updates. The host typically stages the new image via Quad-SPI page programming, verifies a CRC, then swaps boot pointers; datasheet program/erase timings define the update window the system must tolerate. Wear-leveling or bank rotation is advisable when updates are frequent, since NOR endurance is finite per block and OTA traffic concentrates writes.
Recommended
Embedded Logging and Data Retention
The MT25QU256ABA8E12-0AUT serves as nonvolatile storage for configuration, calibration data, and event logs in embedded systems, a use case cited directly in distributor product overviews. NOR's random-address access lets the host read or patch individual log records and calibration constants without block-level overhead, unlike NAND. The 256Mbit array provides ample space for years of timestamped events at typical logging rates, and the nonvolatile array retains data through power loss and brownout cycles. Designers should verify the datasheet-specified data-retention specification against the product's expected service life and restrict log writes via wear management, since per-block endurance is finite and should never be assumed from typical family figures.
Recommended
Recommended Products Summary
Engineering reference data for MT25QU256ABA8E12-0AUT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MT25QL256ABA8E12-0AUT | MT25QU256ABA8E12-1SIT | W25Q256JV | GD25Q256D |
|---|---|---|---|---|---|
| Package | 24-T-PBGA (6x8 mm) | 24-T-PBGA (6x8 mm) - same | 24-T-PBGA (6x8 mm) - same | SOIC-16/WSON-8 class - different footprint | SOIC-16/WSON-8 class - different footprint |
| Brand | Micron Technology | Micron Technology | Micron Technology | Winbond | GigaDevice |
| Density | 256 Mbit (32 MB) | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit |
| Supply Voltage | 1.8 V (1.70V-2.00V) | 3.0 V (2.7V-3.6V) | 1.8 V | [DATA_NEEDED] | 3.3 V (standard series) |
| Max Clock / Quad SPI | 166 MHz | 166 MHz class | 166 MHz class | [DATA_NEEDED] | [DATA_NEEDED] |
| Interface | SPI / Dual / Quad I/O | SPI / Dual / Quad I/O | SPI / Dual / Quad I/O | SPI / Quad I/O | SPI / Quad I/O |
| Grade | Automotive (-AUT) | Automotive (-AUT) | Industrial (-IT) | Industrial/consumer standard | Industrial/consumer standard |
| Drop-in on Same PCB | - | Yes - same 24-TBGA footprint (voltage rail must be 3V) | Yes - same footprint, grade/speed suffix differs | No - package differs, PCB redesign required | No - package differs, PCB redesign required |
Key Differentiators
- Automotive-grade ordering code with 1.8V low-voltage operation (vs W25Q256JV)
- Same 24-TBGA footprint across the QU/QL voltage family (vs MT25QL256ABA8E12-0AUT)
- 166 MHz quad-mode read performance (vs MT25QU128ABA8E12-0AUT)
Design Notes
At the 166 MHz Quad-SPI operating frequency, treat the QSPI bus as a moderate-speed digital bus: keep clock-to-data trace skew tight, route clock with a continuous ground reference, and add 22-33 ohm series termination near the driver on SCLK if trace lengths exceed a few centimeters. In XIP mode, timing failures typically appear as intermittent boot crashes that worsen at temperature extremes, so validate read margins at both ends of the operating range. Follow Micron's serial NOR layout guidance in the family datasheet for ball-via placement and reference planes.
The device operates from a 1.70V-2.00V rail. Place a 100 nF ceramic decoupling capacitor within a few millimeters of the VCC ball plus a bulk 4.7-10 uF capacitor per board segment; ensure the host holds HOLD#/RESET# at defined levels during power ramp to prevent the device from entering an undefined state that corrupts the first boot read. Level compatibility matters: do not drive the MT25QU (1.8V) inputs from 3.3V logic - use the MT25QL (3V) sibling on 3.3V rails instead. Estimated current draw during quad reads should be taken from the official datasheet supply-current tables, not assumed.
Three recurring mistakes with this family: (1) substituting MT25QU (1.8V) and MT25QL (3V) parts on the same footprint without matching the board rail - the pinout matches but the voltage does not; (2) confusing ordering-code suffixes - the -0AUT automotive grade, -1SIT industrial grade, and speed letters encode different temperature/timing grades, so verify the full ordering-code decoder in the datasheet before release; (3) relying on family-typical endurance and retention values rather than the values specified for this exact part number, which is a real risk in OTA-heavy automotive duty cycles. Confirm all three against the Micron datasheet.
Compliance Information
The -AUT ordering code designates Micron's automotive-grade product flow; specific AEC-Q100 qualification, RoHS/REACH, and lead-free status were not stated in the provided web data and must be confirmed from the official Micron product page and datasheet.
