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STMicroelectronics M29W200BB70M1

Name: M29W200BB70M1
Brand: STMicroelectronics
SKU: M29W200BB70M1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M29W200BB70M1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 44-SOIC (0.525", 13.34mm Width)

Datasheet:: M29W200BB70M1.pdf

Description:: IC FLASH 2MBIT PARALLEL 44SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,694

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Product details

Overview

M29W200BB70M1 from STMicroelectronics is a 2 Mbit (128Kb × 16 or 256Kb × 8) bottom-boot block flash memory with single 2.7–3.6 V supply, 55 ns access time, and 100,000 program/erase cycles per block - used for firmware storage and boot code in embedded microcontroller systems.

For engineers reviewing the M29W200BB70M1 datasheet, M29W200BB70M1 pinout, M29W200BB70M1 application, or M29W200BB70M1 equivalent, key selection criteria include boot block location (bottom), byte/word organization select (BYTE pin), ready/busy open-drain signaling (RB), and JEDEC-standard command interface compatibility with legacy M29W200 designs.

Technical Context

The M29W200BB implements an asymmetric block architecture with seven independently erasable blocks: one 16 KB bottom boot block, two 8 KB parameter blocks, and four main blocks (32 KB to 64 KB). Its on-chip Program/Erase Controller executes embedded algorithms for byte/word programming and multi-block/chip erase, with status register polling and toggle-bit monitoring.

It supports erase suspend/resume for concurrent read/program operations in non-erasing blocks, unlock bypass mode for accelerated batch programming, and temporary block unprotection via RP pin at VID voltage. The device operates in either 8-bit (BYTE = VIL) or 16-bit (BYTE = VIH) bus mode, with DQ15A–1 serving as data I/O or address input depending on BYTE state.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	2 Mbit (128K × 16 or 256K × 8), enabling compact firmware storage without external address multiplexing
Supply Voltage	2.7–3.6 V single supply - eliminates need for dual-voltage rails in low-power embedded systems
Access Time	55 ns max - supports direct interfacing with 18 MHz microcontrollers without wait states
Program Time	10 µs/byte typical - enables fast field updates and production programming throughput
Endurance	100,000 program/erase cycles per block - ensures long-term reliability in firmware update scenarios
Data Retention	20 years at 85 °C - validated for industrial temperature operation without refresh
Boot Block Location	Bottom configuration (M29W200BB) - maps reset vector to lowest address space for x86/ARM boot ROM compatibility

Pinout & Package

Supplied in SO44 (M) package: 44-pin small-outline integrated circuit, 17.8 mm × 10.2 mm body, gull-wing leads, RoHS-compliant ECOPACK® lead-free construction.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus supporting full 2 Mbit addressing; A16 used only in x8 mode
DQ0–DQ7	Data I/O (x8) / LSB (x16)	Primary bidirectional data path; always active in both bus modes
DQ8–DQ14	Data I/O (x16 only)	Active only when BYTE = VIH; high-impedance in x8 mode
DQ15A–1	Data I/O (x16) or A–1 (x8)	MSB/LSB selector in x16 mode; LSB address bit A–1 in x8 mode
E	Chip Enable	Active-low chip select enabling read/write; disables all I/O when high
G	Output Enable	Active-low output control; places DQ pins in high-Z when high
W	Write Enable	Active-low write strobe controlling command latching into Command Interface
RP	Reset / Temporary Unprotect	Hardware reset (VIL) or VID-triggered block unprotection - no external EEPROM needed for protection management
RB	Ready/Busy Output	Open-drain status indicator - low during program/erase; enables shared pull-up for multi-device busy monitoring
BYTE	Bus Width Select	VIL = 8-bit mode (DQ8–DQ14 high-Z); VIH = 16-bit mode (full DQ0–DQ15 data path)
VCC	Power Supply	2.7–3.6 V core supply; internal lockout below VLKO prevents corruption during power ramp
VSS	Ground	Reference for all signals; requires local 0.1 µF decoupling per datasheet layout guidance
NC	No Connect	Internally unconnected pins - must be left floating or tied to VSS per PCB design rules

Key Features

Feature	Design Value
Erase Suspend/Resume	Allows real-time interrupt handling by pausing block erase to service reads/writes in other blocks
Unlock Bypass Mode	Reduces programming overhead by eliminating repeated unlock sequences - cuts batch write time by ~40%
Asymmetric Boot Block	16 KB bottom-aligned boot sector ensures reset vector fetches valid startup code before main application loads
Independent Block Protection	Per-block software/hardware locking prevents accidental overwrite of bootloader or calibration data
JEDEC-Compatible Command Set	Enables drop-in replacement for legacy M29W200 and interoperability with standard flash programming tools

Applications

Industrial PLC Firmware Storage

Automotive ECU Bootloader

Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments.

IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic reset vector fetch and field-upgradable application code.

Use Value: 20-year data retention at 85 °C and 100K-cycle endurance ensure firmware integrity over full equipment lifecycle without recalibration.

Use Scenario: Hosting secure bootloader and safety-critical calibration tables in engine control units compliant with ISO 26262 ASIL-B requirements.

IC Role / Device Role / Timing Role: Bottom-boot flash delivering verified reset execution path and protected parameter storage with hardware-based block locking.

Use Value: Independent block protection prevents unauthorized modification of emission control maps during diagnostics or reflashing.

Medical Device Configuration Memory

Networking Equipment Boot ROM

Use Scenario: Retaining device-specific calibration coefficients and regulatory compliance settings in portable diagnostic instruments.

IC Role / Device Role / Timing Role: Low-voltage (2.7–3.6 V) flash memory interfaced directly to ARM Cortex-M4 MCU for secure parameter persistence.

Use Value: ECOPACK® lead-free SO44 package meets IEC 60601-1 creepage/clearance and RoHS medical device requirements.

Use Scenario: Storing boot code and FPGA configuration bitstreams in enterprise switches requiring rapid cold-start recovery.

IC Role / Device Role / Timing Role: 55 ns access time enables zero-wait-state execution from flash, reducing boot latency under 100 ms.

Use Value: Unlock bypass programming accelerates factory provisioning of thousands of units with identical firmware images.

Equivalent & Alternatives

The following parts are listed as comparable options for similar flash memory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MX29LV200CBTI-70G	Same density and 70 ns access; uses different command set (Spansion CFI) and lacks erase suspend	Requires firmware driver rewrite; not suitable for suspend-interrupt use cases	Select only if migrating from existing Spansion-based designs with no suspend requirement
S29AL004D70TFI020	4 Mbit capacity, 70 ns access, top-boot configuration; supports CFI query but no unlock bypass mode	Higher density allows future firmware growth but requires board redesign for top-boot address mapping	Choose when system needs >2 Mbit headroom and can accommodate top-boot reset vector relocation

Compared with MX29LV200CBTI-70G and S29AL004D70TFI020, M29W200BB70M1 uniquely delivers bottom-boot alignment, erase suspend capability, and unlock bypass - critical for deterministic boot timing and high-volume programming efficiency in resource-constrained embedded systems.

Availability

M29W200BB70M1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU bootloader deployment, and medical device configuration memory requiring stable component supply across extended product lifecycles.

Supply support for M29W200BB70M1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in microcontrollers, power management, and non-volatile memory solutions for industrial, automotive, and consumer markets.

M29W200BB belongs to ST's legacy parallel NOR flash product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable in-system reprogrammability and JEDEC-standard compatibility.

FAQ

What boot block configuration does M29W200BB70M1 implement?

M29W200BB70M1 implements a bottom-boot block architecture, where the 16 KB boot sector resides at the lowest physical address range (00000h–03FFFh in x8 mode, 00000h–01FFFh in x16 mode). This ensures the processor fetches reset vector and initial instructions from the bottom of memory space, matching standard x86 and ARM boot conventions without address remapping.

How does the BYTE pin affect memory organization and pin usage?

The BYTE pin selects between 8-bit (BYTE = VIL) and 16-bit (BYTE = VIH) bus modes. In 8-bit mode, DQ8–DQ14 and DQ15A–1 are high-impedance; only DQ0–DQ7 carry data. In 16-bit mode, DQ0–DQ15 form a full data bus, with DQ15A–1 acting as DQ15. This pin determines whether A16 is used for addressing and whether external data bus width matches the memory's native interface.

Can M29W200BB70M1 be used in systems requiring frequent firmware updates?

Yes - it supports 100,000 program/erase cycles per block and features erase suspend/resume, allowing background firmware updates without halting real-time operations. Its unlock bypass mode reduces programming time per byte, and independent block protection prevents accidental overwrite of bootloader code during application updates.

Is M29W200BB70M1 compatible with modern microcontrollers lacking legacy parallel buses?

No - it requires a parallel address/data bus (17 address + 8/16 data lines) and discrete control signals (E, G, W, RB, BYTE). It is not SPI, QSPI, or HyperBus compatible. Integration with modern MCUs typically requires an external FPGA/CPLD glue logic layer or selection of serial flash alternatives unless the MCU provides dedicated parallel NOR interface support.

M29W200BB70M1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 44-SOIC (0.525", 13.34mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH - NOR

Memory Size:: 2Mbit

Memory Organization:: 256K x 8, 128K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 70ns

Access Time:: 70 ns

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-SO

M29W200BB70M1 FAQ

1.How can I place an order for M29W200BB70M1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M29W200BB70M1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for M29W200BB70M1 reliable?

The price and inventory of M29W200BB70M1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M29W200BB70M1 is usually 5 days.

3.What payment methods are accepted for M29W200BB70M1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M29W200BB70M1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M29W200BB70M1?

M29W200BB70M1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M29W200BB70M1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for M29W200BB70M1?

For technical support, including M29W200BB70M1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M29W200BB70M1 requirements.

6.How does Aetrix verify that M29W200BB70M1 is sourced from the original manufacturer or authorized distributors?

All M29W200BB70M1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M29W200BB70M1 meets industry standards.

7.What is the process for return or replacement of M29W200BB70M1?

All M29W200BB70M1 units undergo pre-shipment inspection (PSI). If there is an issue with M29W200BB70M1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The M29W200BB70M1 part is unused and in its original packaging.

Return procedure for M29W200BB70M1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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