M58BW32FB5ZA3T - 32Mbit Burst NOR Flash 55ns | Micron
MPN: M58BW32FB5ZA3T β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.46 | $6.46 |
| 10 | $6.1 | $61.00 |
| 100 | $5.65 | $565.00 |
| 500 | $5.25 | $2,625.00 |
| 1,000 | $4.88 | $4,880.00 |
Drop-in alternatives for M58BW32FB5ZA3T β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
M58BW32FB5ZA3F
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M58BW32FB5T3F
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View Datasheet βM58BW16FB4ZA3F
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.48 / Unit
View Datasheet βM29W128GL70ZF3F
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M58BW32FB5ZA3T-TR
β Drop-Inπ Reference alternative (not in catalog)
M58BW32FB5ZA3T Maximum Ratings & Electrical Characteristics
| Memory Type | FLASH - NOR Memory IC |
| Memory Size | 32 Mbit |
| Organization | x32 (Boot Block, Burst) |
| Interface | Parallel |
| Access Time | 55 ns |
| Supply Voltage | 3.3 V (single supply) |
| Burst Mode | Yes (synchronous burst read) |
| Block Architecture | Boot Block |
| Package | 80-LBGA (10 x 12 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR suffix) |
M58BW32FB5ZA3T 80-lbga (10 x 12 mm) Pin Configuration Guide
Complete pinout information for M58BW32FB5ZA3T (80-lbga (10 x 12 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 M58BW32FB5ZA3T.
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
M58BW32FB5ZA3T is suitable for 6 applications: 32-bit Embedded Processor Boot Memory, Telecommunications and Networking Equipment, Industrial Control and Automation, Defense and Avionics Legacy Systems, Test and Measurement Instrumentation, Firmware Banks and Secure Boot Storage.
32-bit Embedded Processor Boot Memory
The M58BW32FB5ZA3T fits boot-ROM duty for 32-bit embedded processors because its x32 parallel bus matches native 32-bit CPU data paths, eliminating bus-width adaptation logic, and its 55 ns access time supports direct execute-in-place (XIP) fetches. The boot-block architecture lets designers lock one small block for immutable boot code while larger blocks hold updatable application firmware. Used between the CPU external-bus controller and system bus with the synchronous burst clock enabled, it streams sequential words after an initial asynchronous address, multiplying effective read bandwidth versus standard asynchronous NOR. The trade-off is a denser 80-ball LBGA routing task and disciplined timing closure versus simpler serial flash boot solutions.
Recommended
Telecommunications and Networking Equipment
Line cards, routers, and switches need fast, non-volatile code storage that survives power loss and supports in-field firmware updates. The M58BW32FB5ZA3T's 32Mbit x32 organization provides 4 MB of code capacity on a wide parallel bus, and its burst read mode accelerates boot and exception-handling fetches where 55 ns random access keeps CPU stall cycles low. Block-level locking protects the golden firmware image while field-upgradable blocks are reprogrammed via the documented command-set state machine. Deployed on the control-plane processor's local bus with 3.3V I/O matching typical backplane logic, it avoids the page-granularity erase overhead of NAND alternatives, at the cost of larger erase blocks than small-sector serial flash.
Recommended
Industrial Control and Automation
PLCs, motor controllers, and factory automation nodes require firmware storage with guaranteed integrity across years of continuous operation and frequent power cycling. The M58BW32FB5ZA3T's boot-block protection secures the startup image against stray writes during brown-out events, and the single 3.3V supply simplifies rail design in 24V-derived industrial controllers. Its 55 ns burst access keeps real-time loop start-up deterministic, and the parallel x32 interface pairs cleanly with the industrial 32-bit CPUs common in legacy automation platforms. Engineers should budget program/erase cycles per the datasheet endurance specification and log wear for frequently-updated parameter blocks.
Recommended
Defense and Avionics Legacy Systems
Long-life military and aerospace platforms still standardized on STMicroelectronics-designed M58BW-series burst NOR benefit from continued Micron Technology supply of the M58BW32FB5ZA3T. Its deterministic 55 ns asynchronous access avoids the controller complexity of NAND, and the burst interface matches the synchronous external buses of heritage 32-bit processors used in avionics mission computers. The 80-LBGA 10 x 12 mm ceramic-compatible board footprint supports the dense, vibration-tolerant assemblies typical of these systems. Because redesign cycles in this domain span decades, pin-compatible family variants such as the ZA3F suffix extend sourcing options without layout changes.
Recommended
Test and Measurement Instrumentation
Oscilloscopes, logic analyzers, and signal generators boot large firmware images and benefit from the M58BW32FB5ZA3T's combination of 32Mbit density and burst-mode read bandwidth. The x32 parallel interface delivers one 32-bit word per burst cycle after the initial 55 ns access, shortening cold-start times compared to serial NOR boot solutions, which matter in bench instruments where users expect immediate readiness. Boot-block locking lets the instrument vendor ship a protected recovery image alongside user-updatable application firmware. Designers should place the LBGA close to the host processor and manage erase/program current pulses with adequate bulk decoupling to avoid rail droop during updates.
Recommended
Firmware Banks and Secure Boot Storage
Any design implementing A/B firmware banks or secure-boot root-of-trust storage can exploit the M58BW32FB5ZA3T's 32Mbit capacity to hold two complete images plus a locked boot block. The 55 ns burst read supports cryptographic verification at power-up without lengthy delays, and the block-lock state machine enforces hardware-level write protection on the root image per the datasheet protection scheme. Running from the same 3.3V rail as the host SoC simplifies sequencing, though designers must follow the datasheet power-up lock timing so protection engages before firmware execution begins. Estimate wear by tracking program/erase counts per block against the datasheet endurance rating.
Recommended
Recommended Products Summary
Engineering reference data for M58BW32FB5ZA3T β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M58BW32FB5ZA3F | M58BW32FB5T3F | M58BW16FB4ZA3F |
|---|---|---|---|---|
| Package | 80-LBGA (10 x 12 mm) | 80-LBGA (10 x 12 mm) - same | 80-LBGA (10 x 12 mm) - same | 80-LBGA (10 x 12 mm) - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Memory Size | 32 Mbit | 32 Mbit | 32 Mbit | 16 Mbit |
| Organization | x32, Boot Block, Burst | x32, Boot Block, Burst | x32, Boot Block, Burst | x32, Boot Block, Burst |
| Access Time | 55 ns | 55 ns class | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Interface | Parallel | Parallel | Parallel | Parallel |
| Unit Price (qty 1, as of 2026-09-05) | $6.46 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Double the density on the same footprint (vs M58BW16FB4ZA3F)
- Fastest suffix in the M58BW32 family (vs M58BW32FB5T3F)
- Synchronous burst read bandwidth (vs M29W128GL70ZF3F)
Design Notes
The synchronous burst clock is the critical net on this device. Keep it short, route it away from the x32 data bus, and length-match address/control lines so the initial 55 ns access window and subsequent burst-cycle timing hold across the full temperature range. Terminate the clock per the datasheet output timing budget; ringing on the burst clock can cause extra words to be clocked out and corrupt reads. This estimate should be validated against the manufacturer datasheet AC timing tables.
Estimated: decouple each VDD ball pair at the 80-LBGA with 0.1 uF ceramic capacitors placed within 2 mm of the balls, plus bulk capacitance near the package, because erase and program operations draw current pulses on the 3.3V rail. If the same rail feeds the host processor, budget for simultaneous program current to avoid rail droop during firmware updates. Verify against the datasheet ICC program/erase figures before finalizing the power tree.
The boot block must be locked per the datasheet protection state machine before firmware execution begins; ensure the power-up sequence engages block locking before releasing the host CPU from reset, or a stray write during brown-out can corrupt the boot image. Also verify the suffix code ordering table - suffix letters (FB5, T3F, ZA3T/ZA3F) encode temperature and speed attributes, so interchanging suffixes without datasheet verification risks shipping parts outside the qualified temperature range.
Compliance Information
Compliance status was not stated in the provided web data; verify RoHS/REACH status on the Micron product page before ordering.
