M29W400FT55N3E - 4Mbit NOR Flash 55ns 48-TSOP | Micron
MPN: M29W400FT55N3E ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.45 | $345.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.8 | $2,800.00 |
Drop-in alternatives for M29W400FT55N3E — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
M29W400FB55N3E
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →M29W400FB55N3F
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →M29F400FT55N3E2
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →M29F400FB55N3E2
✅ Drop-In📋 Reference alternative (not in catalog)
M29W320DB70N3E
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →M29W400FT55N3E Maximum Ratings & Electrical Characteristics
| Memory Type | Flash - NOR Memory IC |
| Memory Size | 4 Mbit |
| Interface | Parallel |
| Access Time | 55 ns |
| Supply Voltage (VCC) | 2.7 V to 3.6 V (program, erase and read) |
| Sector Size | 16 KB, 8 KB, 32 KB, 64 KB (asymmetric boot-block) |
| Boot Block Position | Top (FT suffix) |
| Operating Temperature | -40C to +125C |
| Temperature Grade | Automotive |
| Package | 48-TSOP I |
| Number of Terminals | 48 |
| Package Code / Shape | TSSOP / Rectangular |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| Packaging | Tray |
| Peak Reflow Time | 30 s max |
| Companion Access-Time Grade | 55 ns and 70 ns versions available in family |
M29W400FT55N3E tssop / rectangular Pin Configuration Guide
Complete pinout information for M29W400FT55N3E (tssop / rectangular 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 M29W400FT55N3E.
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
M29W400FT55N3E is suitable for 6 applications: Automotive ECU Boot Code Storage, Industrial Control Firmware Storage, Set-Top Box and Consumer Boot ROM, Networking Equipment Code Storage, Embedded FPGA/MCU Configuration Backup, Medical Device Firmware Storage.
Automotive ECU Boot Code Storage
The M29W400FT55N3E fits automotive ECU boot storage because its AUTOMOTIVE temperature grade and -40C to +125C operating range cover under-hood and body-control environments, while the 55 ns access time permits zero-wait-state code fetch for many 3.3 V MCUs at boot. The FT top-boot-block layout places the small 8 KB and 16 KB sectors at the top of the map, matching processors whose reset vectors sit at the highest addresses. Program and erase run from the single 2.7 V to 3.6 V rail, eliminating a separate programming supply in the vehicle electrical architecture. A typical design connects the 16-bit data bus directly to the MCU external bus interface with the 64 KB sectors holding calibration code; the trade-off versus SPI flash is a 48-pin footprint, but parallel boot removes serial-clock setup risk during cold-crank voltage dips.
Recommended
Industrial Control Firmware Storage
Industrial PLC I/O modules and motor-control boards benefit from the M29W400FT55N3E's -40C to +125C rating and deterministic parallel read timing of 55 ns, which keeps boot code execution timing predictable across factory-floor temperature swings. The asymmetric sector map (16 KB, 8 KB, 32 KB, 64 KB) lets firmware keep parameter blocks in small, quickly-erased 8 KB sectors while application code occupies 64 KB sectors, cutting field-update erase time significantly. Because the device programs and erases from the same 2.7 V to 3.6 V supply as the controller logic, no charge-pump or 12 V programming rail is needed, simplifying the power tree. Designers should implement status-polling firmware for erase completion, as parallel NOR erase latencies far exceed read latency, and reserve one 64 KB sector as a download buffer for in-field firmware upgrades.
Recommended
Set-Top Box and Consumer Boot ROM
Set-top boxes and consumer media terminals have historically used parallel NOR such as the M29W400FT55N3E for boot ROM because the SoC fetches reset code directly (execute-in-place) over the parallel bus with a 55 ns access time, avoiding the serial-flash boot handshake and its latency. The 4 Mbit capacity is sufficient for bootloaders plus compressed firmware loaders, while the top-boot sectors protect the immutable boot image from overwrites during OTA updates. Operating from the shared 2.7 V to 3.6 V consumer 3.3 V rail keeps the power design trivial; the MSL 3 (168 hours) rating fits standard consumer reflow lines with a 30 s peak reflow time. The trade-off against SPI NOR is board area and cost at low densities, so this part suits platforms with an existing parallel bus and mature firmware.
Recommended
Networking Equipment Code Storage
Routers, switches, and line cards use the M29W400FT55N3E to hold the golden boot image that recovers the main firmware after a failed upgrade. The 55 ns access time and parallel interface deliver fast, deterministic early boot, and the -40C to +125C automotive grade adds margin for unventilated telecom racks. The 8 KB and 16 KB sectors are ideal for storing MAC addresses, serial numbers, and board configuration that changes frequently but must survive power loss. Designers typically wire the 16-bit data bus to the network processor with 0402 series termination resistors on the high-speed address lines to control ringing; adding 0.1 uF plus 10 uF ceramic decoupling at each VCC pin keeps the 3.6 V ceiling respected during program bursts drawn by adjacent switching regulators on the same rail.
Recommended
Embedded FPGA/MCU Configuration Backup
In systems where an FPGA or MCU loads its bitstream from a parallel memory, the M29W400FT55N3E provides a 4 Mbit nonvolatile store with 55 ns random access that simplifies the loader state machine: no SPI commands, modes, or clocks, just address-driven reads. Its 2.7 V to 3.6 V operation matches the common 3.3 V configuration rail, and the top-boot sectors keep the golden bitstream in protected 16 KB blocks separate from user-updateable regions. Automotive-grade temperature capability (-40C to +125C) extends use into transportation and heavy-equipment controllers. The engineering consideration is sector-erase latency during bitstream updates - firmware should double-buffer into a 64 KB sector and validate checksums before erasing the protected block, ensuring a power interruption never leaves the device without a bootable image.
Recommended
Medical Device Firmware Storage
Diagnostic and monitoring equipment requires firmware that survives power loss and remains readable across long service lives, making the M29W400FT55N3E's parallel NOR architecture appropriate: byte-addressable 55 ns reads allow the CPU to run integrity checks (CRC over the boot image) quickly at every power-up. The 8 KB small sectors support audit-log and calibration-constant storage with fast single-sector erase cycles, reducing maintenance downtime during recalibration. The wide -40C to +125C range exceeds clinical requirements, providing derating margin that supports reliability demonstrations. Note that its MSL 3 (168 hours) rating must be tracked through contract-manufacturing floor time, and because this is an automotive-graded commercial part, manufacturers should document supplier qualification for their quality files rather than assume medical-specific certification.
Recommended
Recommended Products Summary
Engineering reference data for M29W400FT55N3E — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M29W400FB55N3E | M29W400FB55N3F | M29F400FT55N3E2 | M29F400FB55N3E2 | M29W320DB70N3E |
|---|---|---|---|---|---|---|
| Package | 48-TSOP I | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP I - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Density | 4 Mbit | 4 Mbit | 4 Mbit | 4 Mbit | 4 Mbit | 32 Mbit |
| Access Time | 55 ns | 55 ns | 55 ns | 55 ns | 55 ns | 70 ns |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Boot Block Position | Top (FT) | Bottom (FB) | Bottom (FB) | Top (FT) | Bottom (FB) | Bottom (DB) |
| Sector Sizes | 16 KB, 8 KB, 32 KB, 64 KB | 16 KB, 8 KB, 32 KB, 64 KB | 16 KB, 8 KB, 32 KB, 64 KB | 16 KB, 8 KB, 32 KB, 64 KB | 16 KB, 8 KB, 32 KB, 64 KB | [DATA_NEEDED] |
| Operating Temperature | -40C to +125C (Automotive grade) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Top boot-block organization (FT suffix) (vs M29W400FB55N3E)
- Fastest access-time grade in family (vs M29W320DB70N3E)
- Automotive temperature grade (vs M29F400FT55N3E2)
Design Notes
The M29W400FT55N3E uses a single VCC rail of 2.7 V to 3.6 V for program, erase, and read per the Micron datasheet - there is no separate VPP programming pin. Ensure the 3.3 V rail stays above 2.7 V during erase/program bursts; if the rail is shared with switching regulators, add 10 uF bulk plus 0.1 uF ceramic decoupling at the flash. Estimated: a brownout to 2.6 V mid-erase can corrupt the sector, so add a supervisor (e.g., reset IC with ~2.8 V threshold) that gates the write-enable line.
The 55 ns access-time grade supports fast parallel bus fetch, so address-line ringing matters. Estimated: with a 15 MHz zero-wait-state bus, address setup margins are small; keep TSOP-to-CPU traces under ~10 cm and add 22-33 ohm series resistors on address lines if stubs exceed that. Verify worst-case AC timing at +125C by applying datasheet derating, not 25C typical values, especially in automotive enclosures.
Do not confuse boot-block orientation: the FT suffix (this part) places small boot sectors at the TOP of the map; FB variants mirror them to the bottom. Substituting FB for FT on the same PCB is electrically a drop-in (same 48-TSOP I pinout) but firmware linker scripts and vector tables must be remapped or the system will not boot. Also respect MSL 3 (168 hours) floor-life before reflow, with 30 s maximum peak reflow time.
Compliance Information
Partstack lists temperature grade as AUTOMOTIVE, but AEC-Q100 qualification status, RoHS/REACH, and lead-free data were not present in the retrieved web data; verify on Micron's official product page.
