M29F800FB55M3F2 - 8Mbit 5V 55ns NOR Flash SO44 | Micron
Référence : M29F800FB55M3F2 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.2 | $6,20 |
| 10 | $5.58 | $55,80 |
| 100 | $4.96 | $496,00 |
| 500 | $4.34 | $2 170,00 |
| 1 000 | $3.72 | $3 720,00 |
M29F800FB55M3F2 Présentation
Parallel NOR Flash is a non-volatile memory type in which the memory array is addressed word-by-word (or byte-by-byte) over a parallel address and data bus, exactly like SRAM. Within the memory hierarchy, NOR Flash occupies the code-storage tier: it offers random access at near-SRAM speed, which is why boot code and firmware are executed-in-place (XIP) from NOR, while bulk data storage is typically delegated to NAND Flash or serial Flash.
Key features include a single 5V supply for both read and program/erase operations, 55 ns access time, an embedded program/erase controller implementing automatic byte/word programming and block erase algorithms, and a 64-byte OTP (one-time programmable) area for security or board-ID storage. The bottom boot block arrangement places the smaller 8 KB sectors at the low address range, keeping reset/interrupt vectors in small, frequently re-written sectors.
Technically, the M29F800 family is organized as uniform 64 KB main blocks plus the asymmetric boot sector group. Command-set operation follows the standard single-5V Flash command interface with device status polling via data bits, and a hardware reset pin (RP#) provides power-on reset and deep power-down control. Block protection and temporary unprotection guard firmware against accidental corruption.
Typical applications include automotive ECU boot code storage, industrial PLC firmware, telecom line-card configuration memory, and legacy x86 embedded designs requiring 16-bit burst-free asynchronous code execution from a 5V bus.
Design consideration: verify that the BYTE# strap matches your bus width, because the DQ15/A-1 multiplexed pin changes function between byte and word modes, and incorrect strapping is the most common bring-up failure with this family.
This page synthesizes distributor inventory data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour M29F800FB55M3F2 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec M29F800FB55M3F2 (même facteur de forme et même empreinte) — différant par Organization, Package, Density, Memory Type, Packaging.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
M29F800FT55M3E2
✅ Remplacement direct✓ En stock
$3.95 / unité
Voir la fiche technique →M29F400FB55M3F2
✅ Remplacement direct✓ En stock
$1.72 / unité
Voir la fiche technique →M29F400FT55N3F2
✅ Remplacement direct✓ En stock
$1.51 / unité
Voir la fiche technique →M29F800FB55M3F2
✅ Remplacement direct✓ En stock
$3.72 / unité
Voir la fiche technique →M29F200FT55M3F2
✅ Remplacement direct✓ En stock
$1.85 / unité
Voir la fiche technique →M29F800FB55M3F2 Valeurs maximales et caractéristiques électriques
| Type de mémoire | NOR Flash, Parallel |
| Density | 8389 kbits (8 Mbit) |
| Organisation de la mémoire | 512K x 16-bit / 1M x 8-bit |
| Number of Words | 512 k |
| Bits per Word | 16 bits |
| Access Time | 55 ns |
| Supply Voltage (VCC) | 5 V |
| Boot Block Type | Bottom Boot Block |
| Interface | Parallel, Asynchronous |
| Programming | Embedded byte/word program algorithms |
| OTP Area | 64 byte |
| Température de fonctionnement | -40C to +125C |
| Automotive Qualification | Auto Grade 3 (temperature grade 3, +125C) |
| Boîtier | 44-pin SO (SOIC-44) |
| Type de montage | Surface Mount |
| Packing | Tape & Reel (T/R) |
Guide de configuration des broches du M29F800FB55M3F2 44-pin so (soic-44)
Configuration des broches du M29F800FB55M3F2 (boîtier 44-pin so (soic-44)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour M29F800FB55M3F2.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
M29F800FB55M3F2 convient pour 6 applications: Automotive ECU Boot Code Storage, Industrial PLC Firmware Memory, Telecom Line-Card Code Storage, Legacy x86 Embedded Systems, Test & Measurement Equipment Firmware, Security and Access-Control Systems.
Automotive ECU Boot Code Storage
The M29F800FB55M3F2 fits automotive ECU firmware sockets because it is an Auto Grade 3 device rated -40C to +125C while keeping a 55 ns access time over that entire range, per the Micron M29F family datasheet. The 5V supply matches legacy 5V microcontroller buses in body, powertrain, and industrial-vehicle ECUs without level shifting. Its bottom boot block map keeps reset and interrupt vectors in small sectors, so routine vector-table or calibration-header updates erase and reprogram only 8-16 KB instead of a full 64 KB block, reducing service time and flash wear. Placed on the CPU's 16-bit external bus, the 55 ns device supports zero-wait-state XIP at moderate clock rates; verify wait-state settings against the actual MCU bus timing, since automotive 5V MCUs often run buses slower than the flash's capability, adding useful timing margin.
Recommandé
Industrial PLC Firmware Memory
Programmable logic controllers and industrial drives commonly store firmware and configuration on 5V parallel NOR Flash because the bus interface is deterministic and asynchronous. The M29F800FB55M3F2's embedded program/erase controller removes firmware-side programming timing loops - the CPU simply issues commands and polls status bits, which simplifies in-field firmware update code. The 512K x 16 organization matches 16-bit industrial MCUs such as legacy C166 and 68K-family parts, and the 55 ns access time tolerates the -40C to +85C industrial envelope with margin to the device's full +125C rating. During field updates, the block-protection feature guards the boot sector against power interruption, a frequent hazard on factory floors. Design the update routine to verify status bits after each block erase rather than using fixed delays, as erase times vary with block history.
Recommandé
Telecom Line-Card Code Storage
Legacy telecom and networking line cards built on 5V buses use the M29F800FB55M3F2 to store boot code, DSP firmware images, and board configuration. The asynchronous 55 ns interface connects directly to the line-card CPU without glue logic beyond standard chip-select decoding, and the 16-bit word mode halves footprint pressure versus byte-wide solutions by using the full DQ0-DQ15 bus. The 64-byte OTP area is valuable here for storing board serial numbers, MAC-address fragments, or factory calibration IDs that survive firmware reflashes. Telecom cabinets routinely reach 70C-85C ambient, well inside the device's +125C rating. During board bring-up, confirm BYTE# is strapped correctly for the intended bus width; the multiplexed DQ15/A-1 pin behaves differently in byte mode and is the most common integration error on this family.
Recommandé
Legacy x86 Embedded Systems
5V x86-class embedded designs (386EX, 486-based SBCs, PC/104 stacks) fetch BIOS from parallel NOR at the top of the address space or at reset vector zero. The M29F800FB55M3F2's bottom boot block suits CPUs fetching from address 0, while the same-footprint FT variant suits sockets where the BIOS sits at the 1 MB top-of-memory boundary. With 55 ns access, the flash operates on the ISA/local bus at typical 8-16 MHz rates with zero or one wait state. The 1M x 8-byte mode directly mirrors the traditional byte-wide BIOS socket, enabling drop-in replacement of older 27C010/27C020 EPROMs where the carrier board provides WE#/OE# connections. Because program/erase needs no 12V VPP, in-system BIOS updates are practical with only the 5V rail present, matching the original AT power architecture.
Recommandé
Test & Measurement Equipment Firmware
Bench instruments - oscilloscopes, power supplies, and signal generators from the 1990s-2000s 5V generation - store firmware and factory calibration tables in parallel NOR Flash. The M29F800FB55M3F2 serves both as new-design storage and as a service replacement for failing legacy Flash. Its -40C to +125C rating covers the upper temperature zones near power stages inside instruments, and the 55 ns access keeps calibration-table lookups on the processor bus without RAM staging. The separate small boot sectors let manufacturers revision the application image independently of the protected boot sector. For service depots, note that reprogramming requires asserting RP# high and issuing the unlock-command sequences exactly per the datasheet; skipping the reset-pin sequence after power-up is the most frequent cause of status-bit readback failures on the bench.
Recommandé
Security and Access-Control Systems
Door controllers, alarm panels, and CCTV DVRs of the 5V era store firmware, user databases, and event logs on parallel NOR Flash. The M29F800FB55M3F2's block protection allows the security-critical boot sector to be hardware-protected against tampering, while the 64-byte OTP area stores device identity keys that cannot be rewritten - useful for anti-clone provisioning. The 512K x 16 array holds a typical controller firmware image plus an in-flash event log partition, and the 55 ns access supports real-time event servicing without copy-to-RAM latency. Outdoor-rated panels see -40C in winter and high enclosure temperatures in summer; the device's full automotive range covers both extremes. When implementing an event-log partition in Flash, wear-level by rotating across the uniform 64 KB main blocks, since erase endurance is finite per block.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour M29F800FB55M3F2 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | M29F800FT55M3E2 | M29F400FB55M3F2 | M29F400FT55N3F2 | M29F200FT55M3F2 |
|---|---|---|---|---|---|
| Package | 44-pin SO (SOIC-44) | 44-pin SO (SOIC-44) - same | 44-pin SO (SOIC-44) - same | 44-pin SO (SOIC-44) - same | 44-pin SO (SOIC-44) - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Density | 8 Mbit | 8 Mbit | 4 Mbit | 4 Mbit | 2 Mbit |
| Access Time | 55 ns | 55 ns | 55 ns | 55 ns | 55 ns |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Boot Block Location | Bottom boot | Top boot | Bottom boot | Top boot | Top boot |
| Operating Temperature | -40C to +125C (Auto Grade 3) | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Organization | 512K x 16 / 1M x 8 | 512K x 16 / 1M x 8 | 256K x 16 / 512K x 8 | 256K x 16 / 512K x 8 | 128K x 16 / 256K x 8 |
Principaux différenciateurs
- Bottom boot block layout (vs M29F800FT55M3E2)
- Full automotive temperature range (vs M29F400FB55M3F2)
- Capacity trade-off option (vs M29F400FB55M3F2)
Notes de conception
Strap BYTE# correctly for the bus width before power-up. In word mode, pin DQ15/A-1 acts as DQ15; in byte mode it becomes the least-significant address A-1 and DQ8-DQ14 float. A wrong strap is the most common bring-up failure on the M29F800 family and can appear as reads of all 0xFF or shifted data. Tie RP# high through a pull-up (do not leave floating) because the device is in reset/power-down and cannot respond to commands when RP# is low.
Decouple VCC with at least 0.1 uF ceramic close to the package plus 4.7-10 uF bulk per device, because block-erase pulses draw current bursts on the 5V rail. The embedded program/erase controller needs a stable VCC within the datasheet range for the full algorithm; brown-outs mid-erase can corrupt the block, so add a supervisor (e.g., a 5V reset IC) that holds RP# low until VCC is valid. For in-system update designs, guarantee the 5V rail stays in regulation during the entire erase sequence.
Keep address and data traces short and length-matched loosely (asynchronous interface does not require tight matching); focus on clean return paths under the flash for reduced ring-back on the 55 ns edges. For drop-in footprint reuse across M29F400/M29F800 variants, confirm the family pinout handling of unused higher address pins on the 4Mbit devices before releasing the layout. Use a solder-mask-defined SO-44 land pattern per IPC guidance and verify with the package outline drawing in the Micron datasheet.
Status-bit polling (rather than fixed software delays) is the reliable way to detect program/erase completion: poll DQ7 for the complement of the programmed bit and check DQ5 for timeout. If your CPU prefetches or caches Flash reads, invalidate those buffers after issuing any program/erase command, or the status read may be served from cache and the driver will hang waiting for a bit that already changed.
Informations de conformité
Part is designated Auto Grade 3 (-40C to +125C) per Micron family nomenclature, but RoHS/REACH/lead-free status for this exact suffix was not stated in the retrieved data. Note the family shipped both standard and 'E' (RoHS-compliant) suffixes; verify from the Micron product page compliance documents.
