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AT25SF041B-MAHB-T

RENAT25SF041B-MAHB-T

Renesas Electronics Corporation
FLASH - NOR Memory IC 4Mbit SPI - Quad I/O 108 MHz 8-UDFN (2x3)
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Overview

The AT25SF041B is a 4Mbit Serial Flash memory device designed for a wide range of consumer and industrial applications. It utilizes a high-performance SPI interface with Quad I/O support, capable of clock frequencies up to 108 MHz for fast data throughput. With its low-power architecture and 2.7V to 3.6V operating range, it is well-suited for battery-powered systems requiring reliable non-volatile storage.

Why Choose This Part

This device features an extremely low deep power-down current of 1.2uA, extending battery life in dormant states. It offers flexible protection schemes including individual sector locking and a dedicated 3 x 256-byte OTP security register. The 2x3mm UDFN package provides a significant space advantage for dense PCB layouts compared to traditional SOIC options.

Applications

Microcontroller Boot Code
Storing executable boot firmware for MCUs and SoCs that lack sufficient internal flash memory.
Application Data Logging
Recording sensor data and system events in compact IoT devices where low power consumption is critical.
Parameter Storage
Saving user settings, calibration constants, and configuration profiles that must persist across power cycles.
Wi-Fi and Bluetooth Modules
Providing secondary storage for networking stacks and firmware updates in wireless communication modules.

Key Specifications

Technology FLASH - NOR
Memory Size 4Mbit
Memory Type Non-Volatile
Memory Format FLASH
Mounting Type Surface Mount
Package / Case 8-UFDFN Exposed Pad
Clock Frequency 108 MHz
Memory Interface SPI - Quad I/O
Voltage - Supply 2.7V ~ 3.6V
Memory Organization 512K x 8
Operating Temperature -40degC ~ 85degC (TC)
Supplier Device Package 8-UDFN (2x3)
Write Cycle Time - Word, Page 50us, 2.4ms

Getting Started

Integrate the device using standard SPI, Dual, or Quad I/O drivers provided by your MCU manufacturer's HAL. For hardware validation, ensure the WP and HOLD pins are correctly pulled high if not used, and verify signal integrity at the 108 MHz maximum clock rate. Initial development can be performed using an Adesto or Renesas serial flash evaluation kit.

Also Consider

MX25V4035FM1I Macronix - A competitive 4Mbit Quad SPI flash part commonly used in high-volume consumer electronics.