M29F200FB55N3F2 - 2Mbit 5V NOR Flash 55ns 48-TSOP | Micron
MPN: M29F200FB55N3F2 ✓ 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 | $4.2 | $4,200.00 |
M29F200FB55N3F2 Overview
A parallel NOR flash memory is a nonvolatile semiconductor storage device that allows random access to any address over a parallel address bus, making it suitable for storing boot code and firmware that a microprocessor must execute directly in place (XIP). Within the memory hierarchy, NOR flash sits alongside NAND flash and EEPROM as a member of the nonvolatile memory IC family; unlike NAND, NOR offers fast random read access and byte-level programming, which is why it has traditionally anchored boot and BIOS applications in embedded systems.
Key features of the M29F200FB include its 5 V single-supply operation, 55 ns access time, and an embedded program/erase controller that automatically handles byte and word programming as well as block erase algorithms, offloading the host processor. The FB suffix denotes the bottom boot block architecture, which places the protected boot blocks at the bottom of the address map. The device supports both 8-bit (byte) and 16-bit (word) organization, and operates across an industrial -40C to +125C temperature range.
Architecturally, the memory array is divided into boot and main blocks, with hardware-level block protection available to safeguard the boot code region against accidental erase or programming. Status polling and toggle-bit mechanisms let software detect completion of program or erase operations without interrupts. The device is part of Micron's M29F family of 5 V parallel NOR flash, which descends from the STMicroelectronics M29xxx lineage Micron acquired, providing long-term continuity for legacy designs.
Typical applications include boot firmware storage in industrial controllers, set-top boxes, networking equipment, telecom line cards, and legacy embedded systems that require 5 V memory with in-place code execution. Its industrial temperature rating supports factory automation and outdoor infrastructure hardware.
A key design consideration: 5 V-only parallel NOR is largely a legacy technology - verify long-term supply before new designs, and confirm the boot block orientation (bottom boot FB vs top boot FT variants) matches the target CPU reset vector.
This page adds value beyond the datasheet by compiling drop-in alternatives, cross-brand equivalents, application notes, and sourcing context in one engineer-focused reference.
Drop-in alternatives for M29F200FB55N3F2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with M29F200FB55N3F2 (same form factor and footprint) — differing in Organization, Memory Type, Density, Package Type, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
M29F200FB55N3E2
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →M29F200FB5AN6E2
✅ Drop-In📋 Reference alternative (not in catalog)
M29F160FB55N3F2
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.6 / Unit
View Datasheet →AM29F200BB-55FK
✅ Drop-In📋 Reference alternative (not in catalog)
AM29F200BB55FC
✅ Drop-In📋 Reference alternative (not in catalog)
28F200B
✅ Drop-In📋 Reference alternative (not in catalog)
M29F200FB55N3F2 Maximum Ratings & Electrical Characteristics
| Memory Type | Parallel NOR Flash |
| Density | 2 Mbit (2097 kbits) |
| Organization | 256K x 8 bit / 128K x 16 bit |
| Number of Words | 128 K (x16 mode) |
| Bits per Word | 16 bits |
| Supply Voltage (VCC) | 5 V |
| Access Time | 55 ns |
| Boot Block Architecture | Bottom Boot Block (FB) |
| Programming | Embedded byte/word program algorithm |
| Erase | Embedded block erase controller |
| Operating Temperature | -40C to +125C |
| Package | 48-TSOP I |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Interface | Parallel |
M29F200FB55N3F2 48-tsop i Pin Configuration Guide
Pin configuration for M29F200FB55N3F2 (48-tsop i 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 M29F200FB55N3F2.
Refer to the datasheet for full pin configuration.
Typical Applications
M29F200FB55N3F2 is suitable for 6 applications: Boot Firmware Storage in Industrial Controllers, Networking and Telecom Line Cards, Legacy System Maintenance and Repair (EOL Sourcing), Automotive and Off-Highway Aftermarket ECUs, Test and Measurement Instrument Firmware, Embedded Firmware Development and Emulation Boards.
Boot Firmware Storage in Industrial Controllers
Industrial PLCs and motor controllers typically boot a 5 V-class microprocessor directly from parallel NOR flash, executing reset code in place. The M29F200FB55N3F2 fits this role with its 55 ns access time, which sustains zero-wait-state code execution on classic 16-bit embedded buses, and its 5 V supply that matches legacy industrial logic without level shifters. The bottom boot block (FB) architecture places the reset-vector code in a hardware-protectable region, guarding the bootloader against accidental erasure during field firmware updates of the main application blocks. The embedded program/erase controller executes byte and block algorithms autonomously, so a watchdog-limited MCU can update firmware without custom timing loops. With -40C to +125C operation, the part also tolerates unventilated cabinet environments where consumer-grade flash would fail.
Recommended
Networking and Telecom Line Cards
Legacy telecom line cards, routers, and set-top box designs store boot ROM and configuration images in parallel NOR flash because the CPU can fetch reset code immediately at power-up, before DRAM is initialized. The M29F200FB55N3F2 provides 2 Mbit in 8- or 16-bit organization, letting designers choose the bus width that matches the host processor. Its 55 ns access time supports zero-wait-state execution at typical legacy bus clock rates, and status polling via toggle bits simplifies in-system firmware upgrade software. Hardware block protection secures the boot region, while the 5 V rail matches the drivers and PHY components common on those boards. For longer-life designs, the 16 Mbit M29F160FB sibling shares the same footprint, allowing a density upgrade without PCB respin.
Recommended
Legacy System Maintenance and Repair (EOL Sourcing)
A major ongoing use of the M29F200FB55N3F2 is sustaining 1990s-2000s era equipment - medical instruments, test gear, avionics trainers, and factory machinery - whose boards were designed around 5 V parallel NOR. When these boards fail, repair shops need the exact boot-block geometry and 5 V timing of the original part; a modern 3 V SPI flash would require PCB rework that is uneconomical. The M29F200FB55N3F2's continued listing in Micron's catalog and distributor stock (DigiKey ships same day as of 2026-09-05) makes it a repair lifeline, and if unavailable, the AM29F200BB-55FK drop-in equivalent keeps equipment running without firmware changes. Keep several spares on hand, as this technology class is in end-of-life ramp industry-wide.
Recommended
Automotive and Off-Highway Aftermarket ECUs
Aftermarket engine controllers and off-highway vehicle ECUs designed in the 5 V era still use parallel NOR for the ECU firmware image, where in-place execution avoids a code-copy RAM stage on resource-limited MCUs. The M29F200FB55N3F2's -40C to +125C industrial rating covers underhood-adjacent mounting zones, and its 5 V bus integrates directly with classic driver ICs and sensors in these systems. The bottom boot block protects the bootloader during calibration-table reflashes performed with diagnostic tools, and the embedded program/erase controller means the ECU can update itself reliably even with interrupts disabled for the duration. Designers should budget current draw during erase operations and add bulk decoupling on the 5 V rail to avoid brownouts of the flash mid-erase.
Recommended
Test and Measurement Instrument Firmware
Bench instruments such as oscilloscopes, signal generators, and power supplies from the 5 V design era execute their power-on self test and main firmware from parallel NOR flash. The M29F200FB55N3F2's deterministic 55 ns random access supports the fast boot sequence users expect, while byte/word organization flexibility lets one board layout serve both 8-bit and 16-bit processor families across an instrument platform. Its hardware block protection prevents a corrupted field update from bricking the instrument's boot path, a critical reliability feature for serviceable lab equipment. The embedded algorithms also let the instrument's own application firmware perform self-update with simple status polling. When servicing these instruments, verify the boot block orientation matches the original part before soldering a replacement.
Recommended
Embedded Firmware Development and Emulation Boards
Development platforms for legacy embedded CPUs frequently carry a socketed or soldered 48-TSOP parallel NOR flash so firmware engineers can reprogram images during bring-up. The M29F200FB55N3F2 is ideal for these targets: 2 Mbit matches the code space of classic MCUs, 5 V operation suits older evaluation boards, and the standard M29F command set is supported by every universal programmer and in-circuit flash tool, streamlining the edit-program-test cycle. Toggle-bit and data-polling status mechanisms give quick feedback after each erase or program cycle during debugging. Teams building such boards should qualify the pin-compatible AM29F200BB as a second source at design time, and reserve the protected boot blocks for a recovery bootloader to recover from a failed field update.
Recommended
Recommended Products Summary
Engineering reference data for M29F200FB55N3F2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M29F200FB55N3E2 | M29F200FB5AN6E2 | AM29F200BB-55FK | AM29F200BB55FC | 28F200B |
|---|---|---|---|---|---|---|
| Package | 48-TSOP I | 48-TSOP I - same | 48-TFSOP - same footprint | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP I - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | AMD / Spansion | AMD / Spansion | Intel |
| Density | 2 Mbit | 2 Mbit | 2 Mbit | 2 Mbit | 2 Mbit | 2 Mbit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Boot Block Location | Bottom boot (FB) | Bottom boot | Bottom boot | Bottom boot (BB) | Bottom boot (BB) | Boot block |
Key Differentiators
- 5 V single-supply operation without level shifting (vs M29W800FB70N3F)
- 55 ns access time for zero-wait-state XIP (vs M29W064FB70N3E)
- Bottom boot block for reset-vector protection (vs M29F800FT55M3E2)
- Trade-off: legacy 5 V technology with long-term supply risk (vs N25Q064A13ESFA0F)
Design Notes
Boot block orientation is the single most common substitution error in this family: the FB suffix means bottom boot block, while FT variants place the boot blocks at the top of the address map. A bottom-boot part installed where the CPU reset vector expects top-boot blocks will execute garbage at power-up with no electrical damage, making the fault intermittent and confusing to diagnose. Confirm the boot block location against the original part marking and the processor reset vector before soldering, especially when substituting Spansion AM29F200BB or Intel 28F200B equivalents.
The 5 V supply must remain stable throughout program and erase operations; an abrupt VCC dropout mid-erase can corrupt the block. Estimated: block erase current for 5 V parallel NOR parts of this class typically peaks in the tens of milliamps per the M29F family datasheet, so size the 5 V rail with at least a 10 uF bulk capacitor plus 0.1 uF ceramic decoupling directly at the VCC pins, and avoid sharing the flash supply rail with high-dI/dt loads such as relay or motor drivers on the same board.
Keep the 48-TSOP I address and data traces short and matched where the bus runs faster than about 10 MHz; at the 55 ns access time grade, ringing on long unterminated lines can violate address setup times. Use the BYTE# pin to lock the bus width at board level rather than strapping it dynamically, since floating or switching BYTE# mid-operation corrupts data I/O mapping. If using RP#/RESET, drive it fully high in normal operation - a partially powered reset pin can leave the device in reset and mimic a blank flash.
Plan for supply continuity: 5 V parallel NOR is a legacy technology class in industry-wide end-of-life ramp. Even though the M29F200FB55N3F2 remains orderable as of 2026-09-05, qualify at least one alternative (the same-family M29F200FB55N3E2 or the Spansion AM29F200BB-55FK) at design time, and verify block-protection command sequences in your firmware against both parts, because protection schemes differ subtly between Micron and Spansion implementations.
Compliance Information
Compliance data was not present in the provided web search results. Verify RoHS/REACH status on Micron's official product page before procurement.