AT25SF041-SSHD-T Overview
The AT25SF041-SSHD-T is a high-performance serial interface Flash memory device from Adesto. It supports rapid mapping of program code from Flash memory into embedded or external RAM for execution. In addition, its flexible erase architecture enables multi-purpose data storage without the need for additional storage devices.
The device features optimized erase block sizes, allowing for more efficient management of code and data storage. By properly dividing erase blocks, the AT25SF041-SSHD-T significantly improves memory utilization, enabling users to add more program routines and data segments within the same device capacity.
Furthermore, the device includes three pages of Security Registers, which can be used for unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key storage, and other security purposes. Each Security Register page can be individually locked to ensure the safety of critical data.
AT25SF041-SSHD-T Specifications
Parameter | Value |
Part Number | |
Description | IC FLASH 4M SPI 104MHZ 8SOIC |
Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Clock Frequency | 104MHz |
Technology | FLASH |
Voltage - Supply | 2.5 V ~ 3.6 V |
Write Cycle Time - Word, Page | 5µs, 2.5ms |
Memory Interface | SPI |
Operating Temperature | -40°C ~ 85°C (TC) |
Memory Size | 4Mb (512K x 8) |
Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Memory Type | Non-Volatile |
Package | 8-SOIC |
Base Product Number | AT25SF041 |
AT25SF041-SSHD-T Pin Descriptions
1. CS (Chip Select): Enables the device. When low, the chip is activated and communication is allowed; when high, the device enters standby mode.
2. SO (Serial Data Output): Outputs serial data from the chip during communication.
3. WP (Write Protect): Protects against unintended writes or erases by locking hardware registers.
4. GND (Ground): 0V reference point of the circuit.
5. SI (Serial Data Input): Receives instructions, addresses, and data to be written into the device.
6. SCK (Serial Clock): Provides the clock signal to synchronize data input (SI) and output (SO).
7. HOLD (Hold): Pauses serial communication without deselecting the chip (CS), allowing higher-priority tasks to be handled.
8. VCC (Power Supply): Power input, typically 2.5V to 3.6V.
AT25SF041-SSHD-T Block Diagram
According to the functional block diagram of the AT25SF041, the device features a typical serial Flash memory architecture, with the core built around a Flash Memory Array. Efficient data access is achieved through a combination of advanced control logic. External commands and addresses are input through the Interface Control and Logic, temporarily stored in the Address Latch, and then accurately decoded by the X-Decoder (row decoder) and Y-Decoder (column decoder) to locate specific memory cells within the array.
In terms of data handling and protection, the architecture integrates an SRAM Data Buffer to support efficient data transfer. Meanwhile, the Control and Protection Logic monitors functions such as Write Protect (WP) and Hold (HOLD), ensuring that data is not accidentally erased or overwritten, even in complex electrical environments.
AT25SF041-SSHD-T Features
l Single 2.5V - 3.6V Supply
l Serial Peripheral Interface (SPl) Compatible
- Supports SPI Modes 0 and 3
- Supports Dual and Quad Output Read
l 104MHz Maximum Operating Frequency
- Clock-to-Output (ty) of 6 ns
l Flexible, Optimized Erase Architecture for Code + Data Storage Applications
- Uniform 4-Kbyte Block Erase
- Uniform 32-Kbyte Block Erase
- Uniform 64-Kbyte Block Erase
l Full Chip Erase
l Hardware Controlled Locking of Protected Blocks via WP Pin
l 3 Protected Programmable Security Register Pages
l Flexible Programming
- Byte/Page Program (1 to 256 Bytes)
l Fast Program and Erase Times
- 0.7ms Typical Page Program (256 Bytes) Time
- 70ms Typical 4-Kbyte Block Erase Time
- 300ms Typical 32-Kbyte Block Erase Time
- 600ms Typical 64-Kbyte Block Erase Time
l JEDEC Standard Manufacturer and Device ID Read Methodology
l Low Power Dissipation
- 2uA Deep Power-Down Current (Typical)
- 10uA Standby current (Typical)
- 4mA Active Read Current (Typical)
l Endurance: 100,000 Program/Erase Cycles
l Data Retention: 20 Years
l Complies with Full Industrial Temperature Range
l Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options
- 8-lead SOIC (150-mil and 208-mil)
- 8-pad Ultra Thin DFN (5 x6 x 0.6 mm and 2 x 3 x 0.6 mm)
- 8-lead TSSOP (4 x 4 mm)
- Die in Wafer Form
AT25SF041-SSHD-T Typical Applications
Embedded System Storage:
Used in various embedded devices to store program code, bootloaders, configuration data, system parameters, and other non-volatile data, which can be accessed and executed during MCU startup or operation.
Consumer Electronics:
Used in smart home appliances, portable devices, and digital electronics to store firmware, user settings, and system logs.
Industrial Control and Automation:
Suitable for industrial control systems to store control programs, status records, calibration parameters, and other information that must be retained even after power loss.
Internet of Things (IoT) Devices:
Serves as program memory or data logging storage in various IoT endpoints, leveraging low-power features to support device sleep and wake-up scenarios.
Smart Home and Wearable Devices:
Used in smart home controllers, sensor nodes, and wearable products for storing code and small amounts of data, supporting fast startup and updates.
Automotive Electronics (Certain Systems):
Used in some automotive electronic modules (e.g., body control modules, infotainment systems) to store firmware and parameters (note: specific use may vary depending on manufacturer or device grade).
Medical Electronic Devices:
Used in portable medical monitoring equipment to store calibration data, device status information, and operation logs.
AT25SF041-SSHD-T Packaging Information
Below we list the dimensions for AT25SF041-SSHD-T compact package 8-SOIC, covering different views like top, end and side views.
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