STMicroelectronics M58LW032D110ZA6

Overview

M58LW032D110ZA6 from STMicroelectronics is a 32 Mbit (4Mb × 8 / 2Mb × 16) uniform-block NOR Flash memory with 2.7–3.6 V single-supply operation, 110 ns random read access, 16-word write buffer, and 100,000 program/erase cycles per block. It implements JEDEC-standard command interface and CFI compliance for embedded firmware storage in industrial controllers and telecom baseband modules.

For engineers reviewing the M58LW032D110ZA6 datasheet, M58LW032D110ZA6 pinout, M58LW032D110ZA6 application, or M58LW032D110ZA6 equivalent, key selection criteria include uniform 64 KWord block architecture, VPEN-controlled erase/program enable, dual-mode STS (Ready/Busy or interrupt), byte/word organization select (BYTE), and TBGA64 lead-free package compatibility with automated SMT assembly.

Technical Context

This device uses an on-chip Program/Erase Controller to execute JEDEC-compliant commands-including Block Erase, Word/Byte Program, Write Buffer Load, and Protection Register programming-without external timing control. All operations are managed via command sequences written to DQ lines under enabled chip select (E0–E2) and write enable (W) conditions.

It supports suspend/resume for both program and erase operations, enabling concurrent background erase with foreground read in another block. The 128-bit Protection Register includes factory-programmed 64-bit unique ID and user-programmable 64-bit segment with OTP-level protection, enabling secure boot code locking and field firmware authentication.

Key Specifications

Pinout & Package

TBGA64 (10 × 13 mm, 1 mm pitch, 8 × 8 ball array) package compliant with JEDEC J-STD-020B and RoHS. Lead-free finish suitable for Pb-free reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR Flash memory applications.

Compared with S29GL032N11TFI010 and MX29LV320ETXBI-90G, M58LW032D110ZA6 uniquely combines VPEN hardware gating, CFI compliance, and 16-word write buffer in a compact TBGA64 package-making it optimal for new designs requiring secure, high-throughput firmware storage with minimal board area.

Availability

M58LW032D110ZA6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband code memory, medical diagnostic equipment boot ROM, and automotive infotainment system flash requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for M58LW032D110ZA6 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, power ICs, and sensors for industrial, automotive, and consumer markets.

The M58LW032D belongs to ST's legacy parallel NOR Flash product line, engineered specifically for reliable, secure, and high-speed firmware storage in resource-constrained embedded systems requiring deterministic timing and long-term data retention.

FAQ

What is the function of the BYTE pin on M58LW032D110ZA6?

The BYTE pin selects between x8 and x16 data bus configurations: logic high enables x16 mode (A1 is LSB), while logic low enables x8 mode (A0 is LSB). This setting is sampled at power-up and determines how the 32 Mbit array is organized-either as 4 Mb × 8 or 2 Mb × 16-impacting address decoding and software driver initialization.

How does the VPEN pin enhance security in M58LW032D110ZA6?

VPEN is a hardware-enable input that must be driven high to permit any program or erase operation. When held low, all such commands are ignored-even if correctly sequenced-preventing accidental or malicious firmware modification during power transitions or system faults. This provides a physical layer of protection complementary to block-level software locks.

Can M58LW032D110ZA6 operate with VDD and VDDQ at different voltages?

No. Per datasheet Section "VDD Supply Voltage" and "VDDQ Supply Voltage", both VDD and VDDQ must be supplied within the same 2.7–3.6 V range and are internally monitored for tracking. Applying different voltages violates absolute maximum ratings and may cause undefined behavior or latch-up due to internal level-shifter biasing constraints.

What is the purpose of the STS pin's dual-mode configuration?

The STS pin can be configured via the Configure STS command as either Ready/Busy (static high/low indicating P/E controller state) or Status (pulse output signaling completion of program/erase). In Status mode, it serves as a hardware interrupt to offload polling overhead from the host CPU-critical for real-time systems where deterministic response latency is required.