M29W256GH70ZS3F - 256Mbit NOR Flash, 70ns, 64-BGA | Micron
MPN: M29W256GH70ZS3F β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.6 | $86.00 |
| 100 | $7.75 | $775.00 |
| 500 | $7.1 | $3,550.00 |
| 1,000 | $6.55 | $6,550.00 |
Drop-in alternatives for M29W256GH70ZS3F β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
M29W256GH70ZS3E
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M29W256GH70ZS6F
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M29W256GL70ZS3F
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
M29W256GH70ZS3F Maximum Ratings & Electrical Characteristics
| Memory Type | NOR Flash (Parallel) |
| Memory Size | 256 Mbit (32 MB) |
| Organization | 32M x 8 / 16M x 16 |
| Access Time | 70 ns |
| Supply Voltage | 2.7 V to 3.6 V (3 V class) |
| Interface | Parallel (asynchronous) |
| Mounting Type | Surface Mount |
| Package | 64-ball TBGA |
| Data Bus Width | 8 bit / 16 bit (BYTE-selectable) |
| Architecture | Bulk erase (GH) |
| Programming | Command-controlled program/erase |
| Write Protection | Hardware and software protection |
| Packaging | Tape & Reel (TR suffix) |
M29W256GH70ZS3F 64-ball tbga Pin Configuration Guide
Complete pinout information for M29W256GH70ZS3F (64-ball tbga 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 M29W256GH70ZS3F.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
M29W256GH70ZS3F is suitable for 6 applications: Automotive ECU Boot Code Storage, Industrial PLC and Automation Controllers, Networking and Telecom Equipment, Set-Top Boxes and Consumer Electronics, Test and Measurement Instrumentation, Point-of-Sale and Embedded Computing Terminals.
Automotive ECU Boot Code Storage
The M29W256GH70ZS3F fits automotive ECU firmware storage because its 70ns access time allows the microcontroller to execute boot and diagnostic code directly from the Flash over the parallel bus (XIP), and its 32MB density accommodates multi-bank firmware images with room for OTA staging. Its 2.7V to 3.6V operation interfaces directly with standard 3.3V automotive logic without level shifting. In use, the CPU resets to a boot vector mapped into the NOR device; the BYTE pin selects 16-bit mode for maximum fetch bandwidth. Hardware block protection can lock the boot sector against corruption. The trade-off versus SPI NOR is pin count, but the deterministic 70ns read latency is essential for time-critical startup paths in powertrain and body-control modules.
Recommended
Industrial PLC and Automation Controllers
Industrial programmable logic controllers require nonvolatile code storage that survives power interruptions and field firmware updates; the M29W256GH70ZS3F addresses this with 256Mbit density for ladder-logic interpreters plus application data, and command-controlled block erase that lets firmware update only changed blocks. The bulk-erase GH architecture keeps block management simple for long-lifecycle products, and software write protection guards the resident runtime image during routine operation. In a typical design the PLC CPU reads at 16-bit width, achieving instruction fetch with zero wait states at common 3.3V bus frequencies, while dual-image layouts use alternating erase blocks to guarantee a valid image after any interrupted update cycle.
Recommended
Networking and Telecom Equipment
Routers, switches, and telecom line cards use the M29W256GH70ZS3F to store boot ROM, device configuration, and fallback firmware images. The 70ns access time supports direct processor execution during boot before main code is copied to RAM, and the 32MB capacity holds redundant images for fail-safe recovery - a common requirement in carrier-grade equipment. Program and erase status polling via toggle-bit is handled by standard drivers, and the 3V supply integrates cleanly with existing 3.3V board rails. Compared to NAND, NOR's bit-level random access eliminates bad-block management for the boot path, which is why parallel NOR remains the default boot medium in high-availability network hardware despite higher cost per bit.
Recommended
Set-Top Boxes and Consumer Electronics
Set-top box and smart-home platform main boards deploy the M29W256GH70ZS3F as the boot and firmware Flash: its 16-bit parallel bus delivers the fetch bandwidth needed by boot ROM code, while 32MB stores the complete resident OS image and calibration data. The BYTE pin lets a single board design support both 8-bit legacy firmware and 16-bit optimized builds, simplifying platform derivatives. Field upgrades use command-sequence block erase with dual-image staging so a failed update never bricks the unit - the previous image remains intact. Its 64-ball TBGA package reflows on standard consumer SMT lines, and hardware write protection prevents accidental overwriting of the bootloader during normal media playback and user configuration writes.
Recommended
Test and Measurement Instrumentation
Bench instruments such as oscilloscopes, signal generators, and data loggers store self-calibration tables, instrument firmware, and boot code in the M29W256GH70ZS3F. The 70ns parallel access gives the main processor deterministic startup calibration reads, and the 32MB array segments into calibration, factory-default, and field-firmware regions. Because calibration data must never be lost, the device's software block protection locks calibration blocks while leaving firmware blocks erasable during service updates. The 3V supply and standard CMOS parallel interface connect directly to the instrument's bus controller without glue-level translation. Designers should reserve calibration blocks with minimal erase cycles to maximize data-retention headroom over the instrument's service life.
Recommended
Point-of-Sale and Embedded Computing Terminals
Embedded terminals - POS systems, kiosks, medical handhelds - use the M29W256GH70ZS3F for boot code and transaction-application storage where power loss can occur at any moment. The NOR architecture guarantees bit-addressable reads immediately after reset, so the terminal boots reliably even with corrupted user data elsewhere, and dual-bank firmware staging allows safe remote updates. The 2.7V to 3.6V supply tolerates battery-fed rail droop during brownout conditions, and the 64-ball TBGA withstands vibration in mobile payment terminals. With 70ns access, the CPU runs init code directly from Flash before swapping in a compressed application image, keeping cold-start times within typical point-of-sale compliance windows.
Recommended
Recommended Products Summary
Engineering reference data for M29W256GH70ZS3F β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M29W256GH70ZS3E | M29W256GH70ZS6F | M29W256GL70ZS3F |
|---|---|---|---|---|
| Package | 64-ball TBGA | 64-ball TBGA - same | 64-ball TBGA - same | 64-ball TBGA - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Memory Size | 256 Mbit (32 MB) | 256 Mbit | 256 Mbit | 256 Mbit |
| Access Time | 70 ns | 70 ns | [DATA_NEEDED] | 70 ns |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Organization | 32M x 8 / 16M x 16 | 32M x 8 / 16M x 16 | 32M x 8 / 16M x 16 | 32M x 8 / 16M x 16 |
| Architecture Suffix | GH (bulk erase) | GH (bulk erase) | GH (bulk erase) | GL (verify variant) |
| Revision Suffix | F | E (prior revision) | F | F |
Key Differentiators
- Latest revision suffix (F) of the M29W256GH family (vs M29W256GH70ZS3E)
- Guaranteed 70 ns access time (vs M29W256GH70ZS6F)
- Bulk-erase GH architecture simplifies firmware block management (vs M29W256GL70ZS3F)
Design Notes
Decouple the M29W256GH70ZS3F supply balls with a bulk 10uF ceramic capacitor plus 0.1uF per supply ball group, placed within a few millimeters of the 64-ball TBGA. Program and erase operations create transient current spikes on the 2.7V to 3.6V rail; an inadequate decoupling network can cause the rail to dip below the minimum operating voltage and corrupt an in-progress write operation. Route power to the BGA with short, wide traces or dedicated planes.
Do not drive the BYTE pin dynamically during an active operation - the 8-bit/16-bit selection is latched per access and mid-operation changes corrupt command sequences. Additionally, when substituting the E-revision (M29W256GH70ZS3E) for the F-revision, verify the block-protection default states and any command-set deltas on both datasheet revisions; revision suffixes can carry functional errata fixes that matter for production firmware drivers.
For the 64-ball TBGA, design the PCB footprint per the Micron package outline drawing with nominal ball pitch tolerance; use non-solder-mask-defined (NSMD) pads for best joint reliability. Keep address/data bus traces length-matched within a few hundred picoseconds for the 70ns timing budget, and reserve via-in-pad escape routing under the array for dense layouts. Follow IPC-reflow-compatible profile limits for lead-free assembly of BGA packages.
With 70ns access timing, read-cycle margins are generous, but write-cycle setup/hold timing to WE# and CE# must be honored at the ball, not just at the CPU. Series-terminate (22-33 ohm) address and control lines when bus length exceeds roughly 10 cm at 3.3V to control ringing on command edges. Verify OE#-to-data valid timing under worst-case temperature and supply conditions per the datasheet AC characteristics before releasing the timing budget.
Compliance Information
Compliance declarations were not present in the verified web data snippets. The ordering suffix ZS3F includes Micron's lead-free/RoHS designator convention, but definitive RoHS/REACH status must be confirmed from the official Micron compliance documentation.
