M29F400FT55N3E2 - 4Mbit 5V Parallel NOR Flash, 55ns | Micron
MPN: M29F400FT55N3E2 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.15 | $4,150.00 |
Drop-in alternatives for M29F400FT55N3E2 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:
M29F400FB55N3E2
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M29F400FB55N3E1
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M29F400FT55N3E1
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
MBM29F400TC-55PFTN
β Drop-Inπ Reference alternative (not in catalog)
M29F400FT55N3E2 Maximum Ratings & Electrical Characteristics
| Memory Type | NOR Flash (Parallel) |
| Density | 4 Mbit (512K x 8) |
| Access Time | 55 ns |
| Supply Voltage | 5 V (single supply) |
| Interface | Parallel |
| Boot Block Architecture | Top boot (FT variant) |
| Package | 44-SO (SOP-44) |
| Mounting Type | Surface Mount |
| Programming Supply | No 12 V VPP required (5.0 V programming) |
| Command Set | JEDEC standard compatible |
| Block Protection | Hardware block protection |
M29F400FT55N3E2 44-so (sop-44) Pin Configuration Guide
Complete pinout information for M29F400FT55N3E2 (44-so (sop-44) 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 M29F400FT55N3E2.
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
M29F400FT55N3E2 is suitable for 6 applications: Embedded Controller Firmware Storage, Telecom Line Cards and Set-Top Boot Code, Automotive and Legacy 5V Systems, Test and Measurement Instrument Firmware, Networking Equipment Boot ROM, Industrial Automation and Robotics Control Boards.
Embedded Controller Firmware Storage
Industrial and commercial embedded controllers need nonvolatile storage for boot and application firmware that survives power loss. The M29F400FT55N3E2's 4 Mbit (512K x 8) density comfortably holds monitor code plus application images, while the 55 ns access time allows many 5 V microprocessors to fetch code directly from Flash without wait states. The top-boot architecture keeps small parameter sectors at the top of the array, protected from bulk-erase operations, and hardware block protection guards the reset-vector region against accidental corruption. Because the device programs from the single 5 V rail with no VPP, firmware can be updated in-system through the host processor without an external programming voltage.
Recommended
Telecom Line Cards and Set-Top Boot Code
Telecom equipment and set-top platforms historically stored boot code in parallel NOR Flash because code must execute immediately at reset, before mass storage is initialized. The M29F400FT55N3E2 provides deterministic 55 ns random access for this execute-in-place role, and its JEDEC-compatible command set simplifies firmware portability across suppliers in the M29F/MBM29F ecosystem. The 5 V supply matches legacy backplane rails common in telecom frames, and no 12 V VPP is required, so field firmware updates run from the card's own supply. Hardware sector protection secures the bootloader while application parameter blocks are updated during maintenance windows.
Recommended
Automotive and Legacy 5V Systems
Many vehicle modules and industrial machines designed around 5 V logic still require drop-in code storage on a parallel bus. The M29F400FT55N3E2 operates from a single 5 V supply and preserves the established M29F400 footprint, allowing service and repair of legacy ECUs, instrument clusters, and controllers without board redesign. Its 55 ns access time meets the read timing of classic 8/16-bit MCUs, and the top-boot sector layout maps naturally to reset vectors in typical 8051- and 68K-style address maps. Firmware revisions can be flashed in-system from the vehicle's or machine's own 5 V rail during depot service.
Recommended
Test and Measurement Instrument Firmware
Bench instruments, data loggers, and process meters store calibration tables, boot loaders, and firmware in parallel NOR Flash for reliable power-loss behavior and fast deterministic boot. The M29F400FT55N3E2 offers 512K x 8 of storage with 55 ns reads, sufficient for lookup tables alongside code in one device, and its hardware block protection lets calibration sectors be locked permanently while the application image remains field-updatable. The single 5 V supply and JEDEC command set make replacement and repair straightforward for service organizations maintaining long-life instrumentation with the M29F400 standard footprint.
Recommended
Networking Equipment Boot ROM
Routers, switches, and access equipment typically execute a boot ROM image from parallel NOR before loading the main OS image from flash disk or network. The M29F400FT55N3E2's 55 ns access time supports zero-wait-state execution on classic CPU bus timings, and its 4 Mbit capacity fits compact bootloaders and recovery images. The top-boot block arrangement places the most frequently updated configuration parameters in small sectors, minimizing erase time during configuration writes. Because programming uses only the standard 5.0 V supply, recovery re-flash can be performed on the bench without dedicated programming voltage hardware.
Recommended
Industrial Automation and Robotics Control Boards
PLCs, servo drives, and robot controllers require firmware that is available at power-on and immune to corruption during normal operation. The M29F400FT55N3E2 provides 4 Mbit of parallel NOR with hardware block protection so the boot sector survives brownouts and errant writes, while application and recipe storage can reside in unprotected blocks updated in the field. The 55 ns access time supports direct code execution from the legacy parallel bus used in many industrial control processors, and the 5 V single-supply operation aligns with the noise-robust logic levels favored in electrically harsh factory environments. The JEDEC-standard command interface eases multi-source firmware strategies.
Recommended
Recommended Products Summary
Engineering reference data for M29F400FT55N3E2 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M29F400FB55N3E2 | M29F400FB55N3E1 | M29F400FT55N3E1 | MBM29F400TC-55PFTN |
|---|---|---|---|---|---|
| Package | 44-SO | 44-SO - same | 44-SO - same | 44-SO - same | 44-SOP / 48-TSOP options - verify suffix |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Fujitsu |
| Density | 4 Mbit (512K x 8) | 4 Mbit | 4 Mbit | 4 Mbit | 4 Mbit |
| Access Time | 55 ns | 55 ns | 70 ns | 70 ns | 55 ns |
| Boot Block Location | Top boot (FT) | Bottom boot (FB) | Bottom boot (FB) | Top boot (FT) | Top boot (TC) |
| Supply Voltage | 5 V single supply | 5 V | 5 V | 5 V | 5 V (no VPP required) |
| Command Set | JEDEC compatible | JEDEC compatible | JEDEC compatible | JEDEC compatible | JEDEC compatible |
| 12V VPP Required | No | No | No | No | No |
| Unit Price (qty 1, as of 2026-09-02) | $6.50 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Fastest speed grade in the 44-SO M29F400 family (vs M29F400FT55N3E1)
- Top-boot sector architecture for reset-vector protection (vs M29F400FB55N3E2)
- Cross-brand sourcing availability for supply resilience (vs MBM29F400TC-55PFTN)
Design Notes
Confirm boot-block placement before BOM release. The FT (top boot) suffix places parameter sectors at the top of the 512K x 8 array; if your processor's reset vector maps to address 0x00000, you need the FB (bottom boot) variant instead. Substituting FT for FB keeps the pinout and electrical parameters identical but corrupts boot-code mapping at first erase. Check the ordering code suffix 'FT' vs 'FB' explicitly on the purchase order, not just the speed and package fields.
Verify bus timing margin at temperature extremes. The 55 ns access time is specified under datasheet test conditions; over the full industrial temperature range and with bus loading from multiple devices, effective address-to-data delay can grow. Estimated: if your MCU bus cycle is 100 ns, the Flash's 55 ns access plus up to 20-30 ns of buffer/address-decode delay still fits, but a 70 ns bus cycle leaves almost no margin. Add wait states if your address decode path uses more than one gate stage.
Keep address and data lines matched in length where practical and place 100 nF ceramic decoupling capacitors at each VCC pin of the 44-SO package, as close to the pins as possible. During erase operations the device draws burst currents that can glitch the shared 5 V rail; a local bulk capacitor (estimated 10 uF) near the Flash prevents rail droop from affecting neighboring 5 V logic. Tie CE#, OE#, and WE# through appropriate pull-ups during reset to avoid spurious writes at power-up.
Because the M29F400FT55N3E2 programs and erases from the 5 V system supply, size the 5 V regulator for program/erase transient current, not just read current. Erase and program operations draw significantly more current than standby reads; consult the manufacturer datasheet for exact values. In battery-backup or brownout scenarios, use the hardware block protection or hold CE# high during undervoltage to prevent partial program operations from corrupting the array.
Compliance Information
Compliance status not stated in provided web data. The 'E2' ordering suffix in the Micron code scheme typically denotes a lead-free/RoHS revision of the M29F family; confirm on the official Micron part-detail page before relying on this.
