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STMicroelectronics M50LPW116N1

Name: M50LPW116N1
Brand: STMicroelectronics
SKU: M50LPW116N1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M50LPW116N1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 40-TFSOP (0.724", 18.40mm Width)

Datasheet:: M50LPW116N1.pdf

Description:: IC FLASH 16MBIT PARALLEL 40TSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,423

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Product details

Overview

M50LPW116N1 from STMicroelectronics is a 16 Mbit (2M × 8) non-volatile boot block flash memory with Low Pin Count (LPC) and Address/Address Multiplexed (A/A Mux) dual interfaces, operating from a single 3.0–3.6 V supply (VPP = 12 V optional for fast program/erase), featuring 50 independently erasable blocks including one 16 KB boot block, and embedded Program/Erase Controller compliant with JEDEC command sets.

For engineers reviewing the M50LPW116N1 datasheet, M50LPW116N1 pinout, M50LPW116N1 application, or M50LPW116N1 equivalent, this device serves as BIOS storage in PC chipsets using LPC interface, supports production programming via A/A Mux mode, delivers 10 µs typical byte programming time, and provides hardware write protection with TBL/WP pins and register-based lock-down capability.

Technical Context

The M50LPW116N1 implements an asymmetrical block architecture: 1 boot block (16 KB), 18 parameter blocks (2 × 8 KB + 16 × 4 KB), and 31 main blocks (1 × 32 KB + 30 × 64 KB). It integrates a status register with dedicated bits for program/erase suspend, VPP detection, and block protection status.

LPC interface operates synchronously with a 33 MHz PCI clock and uses 5 bidirectional LAD0–LAD3 lines plus LFRAME for frame signaling, while A/A Mux mode supports standard parallel flash programming with A0–A10, DQ0–DQ7, G, W, RC, and RB signals - enabling compatibility with legacy flash programmers.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	16 Mbit (2M × 8 organization), supporting byte-level read/write access.
Supply Voltage	VCC = 3.0–3.6 V for all operations; VPP = 12 V optional for accelerated program/erase cycles.
Programming Time	10 µs typical per byte (single-byte mode); 2.5 µs typical per quadruple byte (A/A Mux mode).
Block Architecture	50 blocks: 1 boot (16 KB), 18 parameter (8 KB + 16 × 4 KB), 31 main (32 KB + 30 × 64 KB).
Interface Modes	Dual-mode: LPC (5-signal, 33 MHz synchronous) and A/A Mux (parallel address/data bus).
Status Register	8-bit register with dedicated bits for Program/Erase Controller, Suspend, VPP, and Block Protection status.
JEDEC Compliance	Fully compliant with JEDEC-standard command set for Read Array, Status, Electronic Signature, Program, Erase, Suspend/Resume.

Pinout & Package

Package: TSOP40 (Plastic Thin Small Outline, 40-lead, 10 × 20 mm, 0.5 mm pitch).

Pin/Terminal	Circuit Role	Design Meaning
LAD0–LAD3	LPC bidirectional data/address lines	Carry multiplexed command/data frames in LPC mode; support 5-signal minimal interface footprint.
LFRAME	LPC frame synchronization input	Indicates start of LPC communication frame; enables deterministic timing alignment with 33 MHz clock.
CLK	LPC system clock input	Synchronizes all LPC transactions to external 33 MHz PCI clock; no internal PLL required.
TBL / WP	Hardware block protection inputs	TBL locks top boot block; WP enables global write protection - both active-low, direct-connect to platform GPIO.
ID0–ID3	Interface identification inputs	Configure memory identification and block mapping at power-up/reset; determine A25–A21 address bits.
GPI0–GPI4	General-purpose inputs	Provide 5 configurable platform signals (e.g., board revision, security mode, debug enable) readable via register map.
VPP	Optional high-voltage supply	Enables fast program (10 µs → sub-µs effective) and fast erase; must be externally generated and isolated.

Key Features

Feature	Design Value
Low Pin Count Interface	Reduces motherboard routing complexity by replacing ISA-style 24+ pin flash interface with 5-signal LPC bus.
Boot Block Architecture	Isolates critical BIOS code in dedicated 16 KB block with independent hardware/software protection.
Program/Erase Suspend	Allows interrupting erase or program operations to service higher-priority reads - essential for real-time BIOS updates.
Embedded Controller	Offloads timing-critical sequences (e.g., VPP ramp, pulse width, verify loops) from host processor.
Register-Based Protection	Lock registers (Write Lock, Read Lock, Lock Down) prevent accidental modification of protected blocks during firmware update.

Applications

PC BIOS Storage

Industrial Control Firmware

Use Scenario: Storing and executing core system BIOS on x86-based motherboards with Intel/AMD chipsets supporting LPC bus.

IC Role / Device Role / Timing Role: Primary non-volatile storage for boot firmware; accessed via LPC interface at 33 MHz synchronous timing.

Use Value: Eliminates need for ISA-compatible flash sockets; reduces PCB layer count and BOM cost versus legacy parallel flash.

Use Scenario: Holding field-upgradable firmware in programmable logic controllers (PLCs) and HMIs requiring robust in-system reprogramming.

IC Role / Device Role / Timing Role: Firmware repository with suspend-capable erase/program for zero-downtime updates during runtime.

Use Value: Enables safe firmware patching without halting control loop execution - verified via status register bit 6 (Erase Suspend).

Embedded System Bootloader

Legacy Flash Programmer Target

Use Scenario: Hosting secure bootloader code in medical or automotive ECUs where boot integrity and tamper resistance are critical.

IC Role / Device Role / Timing Role: First-executed code storage with hardware-locked boot block and register-based read protection.

Use Value: Prevents unauthorized overwrite of bootloader via GPI-configured security mode and TBL/WP pin strapping.

Use Scenario: Mass-programming flash images in manufacturing using standard A/A Mux-compatible gang programmers before board assembly.

IC Role / Device Role / Timing Role: Parallel-mode target device compatible with Data I/O, BP Microsystems, and Xeltek programmers.

Use Value: Eliminates need for custom programming adapters - leverages existing A/A Mux infrastructure with DQ0–DQ7, A0–A10, G, W, RC, RB signals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MX29LV160CBTI-70G	3.3 V-only operation (no VPP pin); 70 ns access time; 16 MB uniform block architecture (no dedicated boot block).	Lacks hardware TBL pin and boot-block-specific protection; requires software-managed block locking.	Select when VPP circuitry is undesirable and uniform block management suffices.
S29GL032N90TFI010	3.0–3.6 V operation; 90 ns access; 32 MB density; supports CFI query; no LPC interface - parallel-only.	Requires full 48-pin parallel interface; incompatible with LPC-based chipset designs.	Select for higher-density, CFI-compliant parallel flash where LPC footprint reduction is not required.

Compared with MX29LV160CBTI-70G and S29GL032N90TFI010, the M50LPW116N1 uniquely combines LPC interface compatibility, dedicated boot block hardware protection, and VPP-accelerated programming - making it irreplaceable in space-constrained PC BIOS implementations requiring fast, secure, and standardized firmware storage.

Availability

M50LPW116N1 is available at Aetrix Electronics and suitable for PC motherboard design, industrial PLC firmware storage, embedded bootloader deployment, and legacy flash programming line integration requiring stable component supply across long-lifecycle programs.

Supply support for M50LPW116N1 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, Switzerland, designing and manufacturing microcontrollers, memories, analog ICs, and power devices for industrial, automotive, and consumer markets.

The M50LPW116N1 belongs to ST's legacy LPC flash memory product line, engineered specifically to replace ISA-bus flash in PC chipsets and enable compact, low-pin-count BIOS storage solutions for x86 platforms.

FAQ

What interface modes does the M50LPW116N1 support, and how are they selected?

The M50LPW116N1 supports two mutually exclusive interface modes: Low Pin Count (LPC) and Address/Address Multiplexed (A/A Mux). Mode selection occurs at power-up or reset via the IC (Interface Configuration) pin state and ID0–ID3 strapping. When IC = VIL, LPC mode activates; when IC = VIH, A/A Mux mode activates. Both modes cannot operate simultaneously, and configuration is latched at reset.

Does the M50LPW116N1 require an external VPP supply for normal operation?

No - the M50LPW116N1 operates fully from a single 3.0–3.6 V VCC supply for read, program, and erase functions. The VPP = 12 V pin is optional and used only to reduce byte programming time from 10 µs to ~2.5 µs (quadruple-byte mode) and accelerate block erase. If VPP is unused, it must be left unconnected or tied to VSS per datasheet guidance.

How is block protection implemented on the M50LPW116N1?

Block protection uses three layered mechanisms: (1) Hardware pins TBL (top boot block lock) and WP (global write protect), both active-low; (2) Software-configurable lock registers (Write Lock, Read Lock, Lock Down) accessible via LPC register interface; (3) Asymmetrical block architecture where Blocks 15–0 share global protection, while other blocks support individual lock bits. Protection status is readable in Status Register Bit 1.

Can the M50LPW116N1 be used in new designs given its 2005 datasheet date?

Yes - the M50LPW116N1 remains actively manufactured and supported by STMicroelectronics for legacy PC and industrial applications requiring LPC-compatible boot flash. ST maintains long-term supply commitments for this part, and Aetrix Electronics guarantees traceable, factory-fresh stock with full lifecycle coordination, including obsolescence notifications and last-time-buy planning.

M50LPW116N1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 40-TFSOP (0.724", 18.40mm Width)

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH - NOR

Memory Size:: 16Mbit

Memory Organization:: 2M x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 250 ns

Voltage - Supply:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-TSOP (10x20)

M50LPW116N1 FAQ

1.How can I place an order for M50LPW116N1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M50LPW116N1 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 M50LPW116N1 reliable?

The price and inventory of M50LPW116N1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M50LPW116N1 is usually 5 days.

3.What payment methods are accepted for M50LPW116N1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M50LPW116N1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M50LPW116N1?

M50LPW116N1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M50LPW116N1 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 M50LPW116N1?

For technical support, including M50LPW116N1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M50LPW116N1 requirements.

6.How does Aetrix verify that M50LPW116N1 is sourced from the original manufacturer or authorized distributors?

All M50LPW116N1 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 M50LPW116N1 meets industry standards.

7.What is the process for return or replacement of M50LPW116N1?

All M50LPW116N1 units undergo pre-shipment inspection (PSI). If there is an issue with M50LPW116N1, 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 M50LPW116N1 part is unused and in its original packaging.

Return procedure for M50LPW116N1:

1.Submit a request within 90 days.

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

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