M29W800FT70N3F - 8Mb 70ns Parallel NOR Flash | Micron
料号： M29W800FT70N3F ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.95 | $29.50 |
| 100 | $2.6 | $260.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.1 | $2,100.00 |
M29W800FT70N3F 概述
Parallel NOR Flash is a nonvolatile memory category that stores code and data in NOR cells addressable byte-by-byte or word-by-word over a parallel address/data bus. In the memory hierarchy it sits alongside masked ROM and serial Flash as primary boot memory: CPUs and microcontrollers execute-in-place (XIP) directly from its array, which is why NOR remains preferred for firmware storage even as NAND dominates bulk data storage.
Key features of the M29W800FT family include the 70 ns random-access time that supports zero-wait-state execution from slow bus clocking, the flexible x8/x16 bus-width organization selected via the BYTE# pin, and block-protected architecture with temporary unprotect for field firmware updates. The asymmetric T (top boot) block map places the boot blocks with CFI (Common Flash Interface) support for software query of erase/program commands and status.
Technically, the device uses a 3 V single-supply EEPROM-array NOR core with automatic program and erase algorithms managed on-chip, eliminating external erase-verify loops. Erase suspend/resume allows reading from one block while erasing another, and the reset/power-down pin (RP#) reduces standby current and provides hardware reset during brown-out events.
Typical applications include automotive ECU boot code storage, industrial drives and motor-control firmware, networking equipment configuration storage, and set-top-box or telecom line-card firmware where a parallel bus XIP memory is mandated by the legacy design.
A key design consideration is lifecycle: this part is marked obsolete, so new designs should plan a drop-in alternative or last-time-buy stock, and legacy designs must qualify substitutes before re-spins.
This page synthesizes verified distributor data, cross-reference results, and drop-in alternative analysis not found on any single distributor page, with pricing as of 2026-09-05.
直接替换替代料： M29W800FT70N3F ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： M29W800FT70N3F （相同外形与封装尺寸） ——差异在于 Memory Type, Package, Organization, Boot Block Location, Interface.
快速对比工具——选择替代料号进行并排对比：
M29W800DT70N6F
✅ 直接替换📋 参考替代料（不在目录中）
M29W800FB70N3F
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.91 / 个
查看数据手册 →M29W800GT70N3F
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
M29W800FT70N3E
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.05 / 个
查看数据手册 →S29AL008J70TFN010
✅ 直接替换📋 参考替代料（不在目录中）
MX26LV800TTC-70G
✅ 直接替换📋 参考替代料（不在目录中）
M29W800FT70N3F 最大额定值与电气特性
| 存储器类型 | NOR Flash, Parallel |
| Density | 8 Mbit |
| 存储组织 | 1M x 8 / 512K x 16 |
| Access Time | 70 ns |
| 电源电压 | 2.7 V to 3.6 V |
| 接口 | Parallel, x8/x16 (BYTE# selectable) |
| Boot Block | Top boot (T variant) |
| 工作温度 | -40C to +125C |
| 封装 | 48-TSOP I |
| 安装类型 | Surface Mount |
| CFI Support | Yes (Common Flash Interface) |
| Block Protection | Yes, with temporary unprotect |
| Reset/Power-Down Pin | Yes (RP#) |
| Erase Suspend/Resume | Yes |
| Packaging | Tape & Reel (TR suffix) |
| Part Status | Obsolete |
| Program/Erase Supply | Single 2.7 V to 3.6 V |
M29W800FT70N3F 48-tsop i 引脚配置指南
M29W800FT70N3F（48-tsop i 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： M29W800FT70N3F.
请参阅 数据手册 以查看完整引脚配置。
典型应用
M29W800FT70N3F 适用于 6 应用s: Automotive ECU Boot Code Storage, Industrial Drive and Motor Control Firmware, Networking Equipment Configuration Storage, Set-Top-Box and Consumer Firmware, Test and Measurement Instrument Firmware, Telematics and Blackbox Data Retention.
Automotive ECU Boot Code Storage
The M29W800FT70N3F was designed for automotive ECU firmware storage: its -40C to +125C grade and 70 ns access time allow a microcontroller to execute boot code in place (XIP) from the 3.3 V parallel bus during cold crank and underhood conditions. The top-boot block map places the small protected boot blocks at the top of the map where many ECUs expect reset vectors, while block protection with temporary unprotect lets calibration teams reflash application blocks without exposing boot code. Because supply is a single 2.7-3.6 V rail, no high-voltage program supply is needed; the RP# pin can hard-reset the array during brown-out to prevent corrupt erases. With the part obsolete, new ECUs should qualify the S29AL008J70TFN010 equivalent.
推荐
Industrial Drive and Motor Control Firmware
Industrial drives, inverters, and motor controllers store their control firmware in the M29W800FT70N3F, relying on its 8 Mbit capacity to hold the real-time control loop plus communication stacks, and its 70 ns access time for deterministic XIP fetch on the 16-bit bus. The industrial 3.3 V rail (2.7-3.6 V tolerance) matches typical DSP/FPGA I/O supplies, and the wide -40C to +125C range covers sealed drive enclosures and cabinet-mounted power stages. Erase suspend/resume lets the controller service interrupts and read parameters from another block while a sector erase completes in the background, avoiding control-loop jitter during field firmware updates. CFI query support lets the update tooling auto-detect sector geometry instead of hard-coding it.
推荐
Networking Equipment Configuration Storage
Routers, switches, and telecom line cards use the M29W800FT70N3F to store bootloader, U-Boot environment, and configuration data on a parallel memory bus. The 512K x16 organization delivers 16-bit reads in a single 70 ns cycle, and the BYTE# pin lets one PCB footprint serve both 8-bit and 16-bit host buses across product variants. Block protection secures the bootloader region while the application/configuration blocks remain field-rewritable, and the 125C-rated variant suits outdoor telecom enclosures. RP# reset protects stored configuration during supply glitches on long backplane runs. Because the part is obsolete, network-equipment maintainers should map stock to service life and qualify Macronix MX26LV800TTC-70G for spares.
推荐
Set-Top-Box and Consumer Firmware
Set-top boxes and consumer AV platforms historically boot from M29W800FT-family NOR Flash: the 70 ns array supports XIP of the boot ROM stage, after which larger NAND loads the main application image. The single 3.3 V supply and TSOP-48 footprint fit cost-optimized boards, while CFI lets a single flashing tool handle multiple densities on the production line. Block protection prevents accidental overwrites of the boot region during OTA failures, and RP# can place the memory in deep power-down to trim standby current in always-on standby modes. For consumer legacy repair and service stock, the Infineon S29AL008J70TFN010 provides an active drop-in with the same TSOP-48 footprint and 3 V operation.
推荐
Test and Measurement Instrument Firmware
Bench instruments and data loggers store firmware and factory calibration constants in the M29W800FT70N3F. Calibration data benefits from NOR's byte-level programming granularity - individual calibration words can be rewritten without erasing neighboring firmware blocks - while the 70 ns access time keeps lookup tables and compensation curves reachable from the host CPU without copy-to-RAM delays. The -40C to +125C grade handles uncooled rack and outdoor instrument environments. Erase suspend lets the instrument continue sampling during routine calibration-table updates. Since the part is obsolete, instrument service organizations should secure last-time-buy stock or validate the Macronix MX26LV800TTC-70G in their flashing jigs before the next board service event.
推荐
Telematics and Blackbox Data Retention
Vehicle telematics units, event data recorders, and industrial blackboxes use the M29W800FT70N3F to retain configuration, event logs, and boot code across power loss - NOR keeps data without battery backup. The automotive temperature rating and 2.7 V write operation allow event writes down to cold-crank supply sags, and block protection prevents tampering with the protected region. The 16-bit organization halves write-cycle bus time when logging bursts of event records, and erase suspend/resume permits logging to continue while an old log sector is erased. The RP# input guards against power-fail corruption mid-erase. Designs migrating away from this obsolete part should qualify the S29AL008J70TFN010 or re-pin for higher-density M29W640G devices.
推荐
推荐产品汇总
工程参考数据： M29W800FT70N3F ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | M29W800DT70N6F | M29W800FB70N3F | S29AL008J70TFN010 | MX26LV800TTC-70G |
|---|---|---|---|---|---|
| Package | 48-TSOP I | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP I - same | 48-TSOP - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Infineon (Spansion) | Macronix International |
| Density | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit |
| Access Time | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns |
| Bus Organization | x8/x16 (BYTE# pin) | x8/x16 | x8/x16 | x8/x16 | x8/x16 |
| Lifecycle Status | Obsolete | Legacy/obsolete | Legacy | Active | Active |
关键差异点
- Automotive temperature grade with tight distribution （对比 MX26LV800TTC-70G)
- Verified pin-terminal drop-in within the same family （对比 M29W800DT70N6F)
- Dual-width bus with BYTE# pin （对比 S29AL008J70TFN010)
设计说明
Confirm the boot-block direction before qualifying any alternative: M29W800FT is top boot, while M29W800DT and M29W800FB are bottom boot. A CPU whose reset vectors sit at the top of the memory map will fail to boot from a bottom-boot part even though the pinout, density, and speed are identical. FindIC's replacement analysis confirms terminals and package match for M29W800DT70N6F, but firmware relinking or address-map review is still mandatory.
The device operates from a single 2.7 V to 3.6 V rail for read, program, and erase. Ensure the 3.3 V rail remains within range during program/erase bursts; brown-out during erase is the leading cause of array corruption. Use the RP# (reset/power-down) pin driven by a supervisor IC so the array is held in reset below the minimum operating voltage, and never leave BYTE# floating - tie it to VCC or GND per your bus width.
Place 0.1 uF ceramic decoupling capacitors at each VCC pin of the TSOP-48 close to the package, since erase and program pulses draw transient current on the 3.3 V rail. Keep the 20-line address bus length-matched where the host runs above 50 MHz; at XIP speeds the 70 ns access time dominates, so stubs matter less than clean VCC. Since the part is obsolete, design new footprints to accept both Micron TSOP-48 and S29AL008J70TFN010/MX26LV800TTC-70G for second-source flexibility.
This part is obsolete - no factory lead time exists. Combine a last-time-buy covering your full service-life requirement with qualification of at least one active cross-brand equivalent (S29AL008J70TFN010 or MX26LV800TTC-70G). For automotive programs, run firmware-level CFI query and block-protection regression tests on the substitute before approving the change, since command-set nuances can differ between vendors.
合规信息
Compliance data not present in verified web data; the N3F suffix and -40C to +125C grade indicate an automotive temperature grade (per Vyrian), but formal RoHS/REACH status must be confirmed from Micron's official product page.