STMicroelectronics

M93S46-WMN6

M93S46-WMN6 Description

The M93S46-WMN6 from STMicroelectronics is a 1Kbit SPI EEPROM designed for reliable non-volatile data storage in embedded systems. Organized as 64 x 16, this EEPROM operates at a clock frequency of 2 MHz and supports a wide voltage range of 2.5V to 5.5V, making it versatile for low-power and standard applications. With a SPI interface, it ensures efficient communication with microcontrollers and other digital systems. The device features a 5ms write cycle time (word/page) and is housed in an 8-SOIC package, suitable for surface-mount assembly. Although marked as obsolete, it remains a robust choice for legacy designs requiring stable EEPROM performance.

M93S46-WMN6 Features

• Memory Size & Organization: 1Kbit (64 x 16) for flexible data storage.
• SPI Interface: Enables high-speed, synchronous communication with host controllers.
• Wide Voltage Range (2.5V–5.5V): Compatible with both 3.3V and 5V systems.
• Fast Write Cycle: 5ms for word/page writes, improving system responsiveness.
• Surface-Mount 8-SOIC Package: Compact and suitable for automated PCB assembly.
• Industrial Compliance: ROHS3 compliant, REACH unaffected, and MSL 1 (unlimited) for reliability in harsh environments.
• Legacy Support: Ideal for maintaining or upgrading older designs without requalification.

M93S46-WMN6 Applications

• Industrial Automation: Stores configuration parameters in PLCs, sensors, and control modules.
• Consumer Electronics: Retains user settings in appliances, set-top boxes, and IoT edge devices.
• Automotive Systems: Non-volatile memory for infotainment, telematics, and firmware backups (non-safety-critical).
• Medical Devices: Reliable data logging in portable diagnostic equipment.
• Legacy Upgrades: Drop-in replacement for older EEPROMs in maintenance-heavy systems.

Conclusion of M93S46-WMN6

The M93S46-WMN6 balances performance, flexibility, and durability, making it a pragmatic choice for applications demanding low-power, SPI-compatible EEPROMs. While obsolete, its wide voltage range, fast write cycles, and industrial-grade compliance ensure longevity in existing designs. Engineers seeking a proven, no-frills memory solution for embedded systems, legacy upgrades, or cost-sensitive projects will find this device a dependable option. For new designs, consider modern alternatives with enhanced densities or advanced features.