M29W800FT70N3F - 8Mb 70ns Parallel NOR Flash | Micron
MPN: M29W800FT70N3F ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 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 Overview
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.
Drop-in alternatives for M29W800FT70N3F — 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 M29W800FT70N3F (same form factor and footprint) — differing in Memory Type, Package, Organization, Boot Block Location, Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
M29W800DT70N6F
✅ Drop-In📋 Reference alternative (not in catalog)
M29W800FB70N3F
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.91 / Unit
View Datasheet →M29W800GT70N3F
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
M29W800FT70N3E
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.05 / Unit
View Datasheet →S29AL008J70TFN010
✅ Drop-In📋 Reference alternative (not in catalog)
MX26LV800TTC-70G
✅ Drop-In📋 Reference alternative (not in catalog)
M29W800FT70N3F Maximum Ratings & Electrical Characteristics
| Memory Type | NOR Flash, Parallel |
| Density | 8 Mbit |
| Organization | 1M x 8 / 512K x 16 |
| Access Time | 70 ns |
| Supply Voltage | 2.7 V to 3.6 V |
| Interface | Parallel, x8/x16 (BYTE# selectable) |
| Boot Block | Top boot (T variant) |
| Operating Temperature | -40C to +125C |
| Package | 48-TSOP I |
| Mounting Type | 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 Pin Configuration Guide
Pin configuration for M29W800FT70N3F (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 M29W800FT70N3F.
Refer to the datasheet for full pin configuration.
Typical Applications
M29W800FT70N3F is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for M29W800FT70N3F — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Automotive temperature grade with tight distribution (vs MX26LV800TTC-70G)
- Verified pin-terminal drop-in within the same family (vs M29W800DT70N6F)
- Dual-width bus with BYTE# pin (vs S29AL008J70TFN010)
Design Notes
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.
Compliance Information
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.