SST25WF010-40-5I-SAF

Memory IC Overview

The SST25WF010-40-5I-SAF is a 1 Mbit (128 K x 8) SPI serial flash memory manufactured using CMOS SuperFlash technology. It operates on a single voltage supply of 1.65V to 1.95V and supports clock frequencies up to 40 MHz via SPI Mode 0 and Mode 3. The device features uniform 4 KByte sectors and 32 KByte overlay blocks for erasure, with typical erase times of 62 ms and byte-program times of 50 µs. It includes hardware reset or programmable hold functionality, software write protection, and AAI programming modes.

Memory IC Feature Summary

• Utilizes split-gate cell design and thick-oxide tunneling injector for superior reliability and manufacturability compared to alternate approaches.
• Supports flexible erase capabilities including uniform 4 KByte sectors and 32 KByte overlay blocks.
• Features an Auto Address Increment (AAI) programming mode to decrease total chip programming time over standard byte-program operations.
• Provides end-of-write detection through software polling of the BUSY bit or busy status readout on the SO pin.

Memory IC Applications

• Embedded systems requiring low pin-count storage solutions
• Firmware storage in microcontroller-based designs
• Data logging applications needing reliable non-volatile storage

Memory IC Procurement Notes

This component is designated as an End-of-Life (EOL) product by Microchip Technology. Verification of current availability requires direct contact with Microchip Sales for replacement information. Standard procurement channels may not list this part as active inventory. Confirm obsolescence status and substitute part numbers before initiating any purchase orders.

Memory IC Selection Notes

Select this device only if the system design strictly adheres to the 1.65V to 1.95V operating voltage range. Ensure the host controller supports SPI Mode 0 and Mode 3 protocols at speeds up to 40 MHz. Consider that the part is obsolete; alternative components from the same family or newer generations should be evaluated for long-term supply stability.

Memory IC Part Context

The SST25WF010 belongs to the Serial Flash 25 Series family, which also includes the SST25WF512, SST25WF020, and SST25WF040 models. These devices share common interface characteristics and SuperFlash technology but differ in memory density and block organization. The specific suffix indicates industrial temperature range and package type.

Memory IC Replacement Considerations

Microchip directs customers to contact sales for replacement information due to the EOL status. Potential substitutes within the same family include SST25WF512, SST25WF020, or SST25WF040, though density differences must be accounted for. Newer series such as SST25VF or SST25PF may offer functional equivalents with updated supply chains.

Memory IC FAQ

What is the default function of the RST#/HOLD# pin?

From power-on, the RST#/HOLD# pin defaults as a hardware reset pin (RST#). The Hold mode is a user-selected option enabled by an instruction sequence.

How does the WP# pin affect write protection?

The Write Protect (WP#) pin enables or disables the lock-down function of the BPL bit in the status register. When driven low, it allows the BPL bit to lock the BP1 and BP0 bits against alteration.

What are the supported SPI modes?

The device supports both Mode 0 (0,0) and Mode 3 (1,1) of SPI bus operations, differing in the SCK signal state during standby mode.