M29W800FT70N3E - 8Mbit 70ns Parallel NOR Flash | Micron
MPN： M29W800FT70N3E ✓ 啟用中M29W800FT70N3E 概覽
Parallel NOR Flash is a nonvolatile memory technology in which every cell connects directly to a bit line, enabling random access with short, deterministic read latency. Within the memory hierarchy, it sits in the code-storage class alongside serial NOR (SPI) and NAND Flash, but unlike NAND it is byte-addressable and execute-in-place (XIP) capable, which is why boot ROMs in microcontroller and DSP systems have historically used parallel NOR devices like the M29W800 family.
Key differentiating features of this device include the 70 ns access time over the full 2.7 V to 3.6 V operating range, the top-boot-block architecture (the FT suffix denotes top boot block, so the boot code resides at the highest addresses), and dual x8/x16 bus operation selected by the BYTE pin. The M29W800 family descends from the STMicroelectronics/Numonyx M29W product line acquired by Micron, preserving broad legacy design-in bases.
Technical depth: the device uses a single-supply architecture in which program and erase operations are performed at VCC (2.7 V to 3.6 V) without a separate high-voltage pump rail on the board. Command-set programming follows the industry-standard M29 command interface, and a status/polling scheme lets the host CPU monitor program and erase cycles. Block protection allows hardware locking of critical boot blocks to prevent accidental corruption.
Typical applications include boot-code storage in industrial PLCs, set-top boxes and network routers, parameter storage in automotive body electronics and instrumentation clusters, and firmware storage in legacy telecom line cards where a 48-TSOP I parallel footprint is already committed on the PCB.
Design consideration: because the part is supplied in the 48-TSOP I (0.5 mm pitch) package, ensure a proper reflow profile per the manufacturer packing/handling documentation and keep address/data bus trace lengths matched to avoid sampling errors at fast access times.
This page synthesizes distributor stock data, family cross-references, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, as of 2026-09-02.
直接替換替代品，適用於 M29W800FT70N3E — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： M29W800FT70N3E （相同外形與佔位） — 差異在於 Memory Type, Interface, Package, Density, Organization.
M29W800FT7AN3F
✅ 直接替換📋 參考替代品（不在目錄中）
M29W800FB70N3E
✅ 直接替換聯絡詢價
查看資料表 →M29F800FT55N3E2
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →M29W400FT55N3E
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →M29W320DT70N3F
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →M29W128GL70N3E
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →M29W800FT70N3E 規格
| 記憶體類型 | NOR Flash (Parallel) |
| Density | 8 Mbit |
| 組織 | 1M x 8 / 512K x 16 |
| Access Time | 70 ns |
| Supply Voltage (VCC) | 2.7 V to 3.6 V |
| Programming / Erase Supply | Single supply at VCC (2.7 V to 3.6 V) |
| Boot Block Location | Top boot block (FT variant) |
| Bus Width | 8-bit or 16-bit (BYTE pin selectable) |
| 介面 | Parallel, address/data bus |
| 工作溫度 | -40C to +125C |
| 封裝 | 48-TSOP I (12 x 20 mm, 0.5 mm pitch) |
| 安裝類型 | Surface Mount |
M29W800FT70N3E 48-tsop i (12 x 20 mm, 0.5 mm pitch) 腳位配置指南
M29W800FT70N3E（48-tsop i (12 x 20 mm, 0.5 mm pitch) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： M29W800FT70N3E.
請參閱 資料表 以查看完整腳位配置。
典型應用
M29W800FT70N3E 適用於 6 應用s: Boot Code Storage in Industrial Controllers, Set-Top Box and Router Firmware Memory, Automotive Body Electronics and Instrumentation, Legacy Telecom Line Card Firmware, Test and Measurement Instrument Storage, Embedded Systems Retrofit and EOL Substitution.
Boot Code Storage in Industrial Controllers
PLCs, motor drives, and industrial controllers require a deterministic, byte-addressable code memory that the CPU can execute from immediately after reset. The M29W800FT70N3E fits this role with its 70 ns access time, which supports zero-wait-state reads on many 3.3 V processor buses, and its single 2.7 V to 3.6 V supply that simplifies power sequencing in industrial 3.3 V rails. The top boot block (FT architecture) places bootloader code at the top of the 8 Mbit map where the CPU begins fetching, and hardware block protection prevents accidental erasure of the boot image by application firmware updates. Its -40C to +125C rating covers factory-floor temperature extremes, and the x8/x16 selectable bus width lets one firmware toolchain serve both 8-bit and 16-bit controller variants on the same PCB footprint.
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Set-Top Box and Router Firmware Memory
Network routers, modems, and set-top boxes traditionally store bootloader and recovery firmware in parallel NOR Flash because the code must be executable in place (XIP) before DRAM initialization. The M29W800FT70N3E provides 8 Mbit (512K x 16) of XIP-capable storage with a 70 ns access time, fast enough for common 3.3 V embedded CPUs without wait states. The 2.7 V to 3.6 V supply range tolerates rail sag common in consumer power supplies, while the 48-TSOP I package fits legacy board layouts. Command-set program/erase at VCC eliminates a separate programming rail, and block-level protection secures the bootloader partition when the end user performs over-the-air updates to the main firmware image stored elsewhere.
推薦
Automotive Body Electronics and Instrumentation
Instrument clusters, body control modules, and gateway ECUs store calibration data and boot firmware in nonvolatile parallel memory rated for automotive temperature spans. The M29W800FT70N3E operates from -40C to +125C per the family ordering information, matching the -40C to +85C and +125C interior/under-hood requirements of many body-electronics modules. Its 2.7 V to 3.6 V single-supply operation aligns with automotive 3.3 V logic rails, and the 70 ns access time supports direct memory-mapped code and parameter reads. Hardware boot-block protection safeguards calibration images against corruption during low-voltage cranking events, while the x8/x16 selectable bus lets the same part serve both 8-bit and 16-bit microcontroller buses across platform derivatives.
推薦
Legacy Telecom Line Card Firmware
Telecom line cards, backplane controllers, and DSL access equipment designed in the STMicroelectronics/Numonyx era specified the M29W800 in the 48-TSOP I footprint for bootloader and configuration storage. The M29W800FT70N3E is a maintenance-replacement part for these sockets: it preserves the M29W command set, the 70 ns timing budget, and the exact 8 Mbit top-boot memory map, so no driver or firmware changes are needed when replacing aging stock. The parallel interface retains deterministic access latency required for in-service diagnostics, and the 2.7 V to 3.6 V supply range is compatible with the 3.3 V rails used throughout telecom shelves. Using the Findchips-cross-referenced M29W800FT7AN3F alongside this part gives buyers a second qualified source for line-card sustaining programs.
推薦
Test and Measurement Instrument Storage
Oscilloscopes, multimeters, and bench power supplies store boot firmware, calibration constants, and user settings in parallel NOR Flash. The M29W800FT70N3E suits these designs with its 8 Mbit capacity (enough for a bootloader plus parameter blocks), 70 ns access time that keeps power-up calibration reads fast, and -40C to +125C operation for unconditioned lab and field environments. The BYTE pin allows x8 access for serial-configuration-style reads and x16 access for code execution, giving instrument firmware flexibility in how it partitions the array. Hardware block protection prevents accidental erasure of the calibration sector during firmware field updates, a common failure mode in instruments that reprogram their settings partition in service.
推薦
Embedded Systems Retrofit and EOL Substitution
When a legacy PCB based on the STMicroelectronics/Numonyx M29W800 loses its original source, the Micron M29W800FT70N3E serves as the continuity part: it was produced on the same acquired production line with the same command set, 70 ns timing, top-boot map, and 48-TSOP I footprint. This makes it an end-of-life substitution for obsolete M29W800 order codes without PCB redesign. Its single 2.7 V to 3.6 V supply and standard parallel interface also let design teams requalify it on boards that originally used 5 V flash families by simply confirming 3.3 V bus compatibility. Pairing it with the cross-referenced M29W800FT7AN3F provides dual-channel sourcing for long-lifetime industrial and medical equipment sustaining programs.
推薦
推薦產品摘要
工程參考資料，適用於 M29W800FT70N3E — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | M29W800FT7AN3F | M29W800FB70N3E | M29F800FT55N3E2 | M29W400FT55N3E | M29W320DT70N3F |
|---|---|---|---|---|---|---|
| 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 | Numonyx Memory Solutions | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Density | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit | 4 Mbit | 32 Mbit |
| Access Time | 70 ns | 70 ns | 70 ns | 55 ns | 55 ns | 70 ns |
| Boot Block Location | Top boot block (FT) | Top boot block | Bottom boot block (FB) | Top boot block (FT) | Top boot block (FT) | Top boot block (DT) |
| Bus Organization | x8 / x16 | x8 / x16 | x8 / x16 | x8 / x16 | x8 / x16 | x16 |
主要差異化特點
- Single-supply 2.7 V-3.6 V program/erase (對比M29F800FT55N3E2)
- Top boot block for XIP boot maps (對比M29W800FB70N3E)
- Dual-source die heritage (對比M29W800FT7AN3F)
- Wide -40C to +125C operating range (對比M29W400FT55N3E)
設計說明
The 48-TSOP I package uses a 0.5 mm lead pitch in a 12 x 20 mm body. Specify a land pattern matching the datasheet recommended footprint and use a reflow profile per Micron packing/handling documentation; the thin TSOP body is moisture-sensitive, so observe the MSL floor-life requirement and bake per J-STD-033 if the dry-pack bag is opened. Keep a silkscreened pin-1 marker aligned to the beveled corner of the package to prevent 180-degree misinsertion during rework.
At the 70 ns access grade, address and data bus round-trip delays plus CPU setup time must remain within the timing budget. Estimated: with a typical 20-30 ns CPU access-cycle allowance, keep bus trace lengths matched and add 22-33 ohm series termination on rising-edge address lines when bus length exceeds about 15 cm. Pull the BYTE pin firmly to the correct rail through a resistor (not left floating) to avoid bus contention on Q15/A-1 during x8 mode operation.
Two recurring field failures with this part: (1) substituting the FB bottom-boot variant without re-addressing firmware - the boot code will not be found because the protected boot blocks sit at the opposite end of the array; (2) ignoring status-bit polling during program/erase - issuing a read or command before the cycle completes corrupts data. Always poll the status bits after each program/erase command and enforce the datasheet block-erase timeout in software. Verify WP#/protection pin strapping so production programming fixtures can modify protected blocks only when intended.
合規資訊
Compliance statements for this exact ordering code were not present in the captured web data. Verify RoHS/REACH status from Micron material declarations on the official product page. AEC-Q100 qualification not stated; -40C to +125C operating range is documented in the family ordering information.
