STMicroelectronics M30LW128D110N6

Overview

M30LW128D from STMicroelectronics is a 128 Mbit stacked flash memory composed of two 64 Mbit M58LW064D dies in a single package, supporting x8/x16 bus width (TSOP56/TBGA64) or fixed x16 (LFBGA88), with 2.7–3.6 V VDD supply, 110 ns random read access, and uniform 128-block (64 KWord/block) architecture for embedded code/data storage in industrial controllers and telecom baseband modules.

For engineers reviewing the M30LW128D datasheet, M30LW128D pinout, M30LW128D application, or M30LW128D equivalent, key selection considerations include block-level erase suspend/resume capability, CFI-compliant command interface, 100,000 program/erase cycles per block, and dual VDD/VDDQ supply separation for I/O voltage flexibility in mixed-signal systems.

Technical Context

This device implements a stacked-die architecture integrating two independent M58LW064D flash arrays sharing a unified command interface and status register. It supports JEDEC-standard Common Flash Interface (CFI) for host compatibility and includes an on-chip Program/Erase Controller (P/E.C.) that automates timing-critical sequences for write buffer programming and block erasure.

The memory features dual-supply operation: VDD (2.7–3.6 V) powers core logic and erase/program functions, while VDDQ (1.8–VDD) independently supplies I/O buffers-enabling interoperability with 1.8 V or 3.3 V microprocessor buses. Block protection is non-volatile and restored at power-up, with hardware VPEN gating all program/erase operations when low.

Key Specifications

Pinout & Package

Available in TSOP56 (14 × 20 mm), TBGA64 (10 × 13 mm, 1 mm pitch), and LFBGA88 (8 × 10 mm, 0.8 mm pitch) packages. TSOP56 and TBGA64 support x8/x16 configuration with BYTE pin and STS output; LFBGA88 supports x16 only and omits BYTE and STS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL128S and MX29LV128DB, the M30LW128D uniquely combines dual-supply I/O flexibility, hardware VPEN gating, and suspend/resume-making it optimal for safety-critical or real-time embedded systems requiring guaranteed firmware update atomicity and mixed-voltage interoperability.

Availability

M30LW128D is available at Aetrix Electronics and suitable for industrial PLCs, telecom baseband modules, medical imaging controllers, and automotive infotainment head units requiring stable component supply across extended product lifecycles.

Supply support for M30LW128D 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 specializing in microcontrollers, power management, and non-volatile memory solutions for industrial, automotive, and consumer applications.

The M30LW128D belongs to ST's M30LW series of high-reliability stacked flash memories, designed specifically for embedded systems demanding high-density, field-upgradable, and electrically robust code storage in space-constrained platforms.

FAQ

What is the function of the VPEN pin, and what happens if it is left unconnected?

The VPEN (Program/Erase Enable) pin is a hardware safety interlock: it must be driven high to permit any program or erase command execution. If left floating or pulled low, all such operations are blocked-even valid command sequences will be ignored. STMicroelectronics specifies VPEN must be actively driven high via external logic or pull-up resistor; no internal pull-up exists. This design prevents accidental memory corruption during power transients or initialization glitches.

Does the M30LW128D support true x8/x16 bus width selection, and how is it configured?

Yes-x8/x16 mode is selected dynamically via the BYTE pin (high = x16, low = x8) on TSOP56 and TBGA64 packages. In x16 mode, A0 is don't-care and A1 becomes the LSB; in x8 mode, A0 is LSB. The LFBGA88 package fixes x16 operation and omits the BYTE pin entirely. Address mapping and DQ pin usage automatically adapt-no external address decoding or bus multiplexing is required.

How does the STS (Status) pin operate, and why is it unavailable on LFBGA88?

STS is an open-drain output configurable as Ready/Busy (static level) or Status Pulse (edge-triggered end-of-operation). It serves as a hardware interrupt to offload CPU polling. STS is omitted on LFBGA88 due to ball count constraints and the package's target use in space-optimized, high-integration designs where status is typically read via software polling of the Status Register-trade-off favoring footprint reduction over interrupt latency.

Can the protection register be reprogrammed after initial setup, and what locks it permanently?

The 128-bit protection register has two 64-bit segments: the first is factory-programmed by STMicroelectronics (non-user-accessible), the second is user-programmable. Once the user segment's lock bit is set via Protection Register Program Command, further writes to that segment are disabled until next power cycle-but the lock state itself persists across power cycles. Permanent locking requires external hardware control of VPEN and RP pins to prevent unauthorized unlock attempts.