Microchip Technology SST26VF032BT-104I/SM70SVAO

Overview

SST26VF032BT-104I/SM70SVAO from Microchip Technology is a 32-Mbit Serial Quad I/O™ (SQI™) Flash memory IC operating at up to 104 MHz (2.7–3.6 V), organized in uniform 4-Kbyte sectors with flexible block protection, and supporting both SPI and SQI protocols for embedded firmware storage in industrial-grade applications.

For engineers reviewing the SST26VF032BT-104I/SM70SVAO datasheet, SST26VF032BT-104I/SM70SVAO pinout, SST26VF032BT-104I/SM70SVAO application, or SST26VF032BT-104I/SM70SVAO equivalent, key selection criteria include its dual-voltage operation (2.3–3.6 V), 100,000-program/erase cycle endurance, OTP Security ID, write-suspend capability, and support for x1/x2/x4 SPI and full SQI modes - all critical for secure, high-throughput boot code and parameter storage in space-constrained designs.

Technical Context

This device implements Microchip's proprietary SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling faster erase (18 ms sector, 35 ms chip) and lower total energy per operation versus conventional Flash. Its six-wire SQI interface uses multiplexed SIO[3:0] for command/address/data transfer, quadrupling throughput over standard SPI at identical clock rates.

Two factory-configured variants exist: SST26VF032B defaults to SPI mode (WP#/HOLD# enabled, SIO2/SIO3 disabled), while SST26VF032BA defaults to SQI mode (WP#/HOLD# disabled, SIO2/SIO3 enabled). The IOC bit in the Configuration register controls this I/O mapping, and must be set before issuing SQI-specific commands like SQOR (6BH) or SQIOR (EBH).

Key Specifications

Pinout & Package

Package: 8-contact WDFN (6 mm × 5 mm), RoHS-compliant, surface-mount with exposed pad for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial flash memory applications.

Compared with Winbond W25Q32JVSIQ and Cypress S25FL132K0XMFI001, SST26VF032BT-104I/SM70SVAO delivers native SQI throughput, integrated OTP Security ID, and finer-grained 4-Kbyte sector erase - making it optimal for space-constrained, security-aware industrial and automotive firmware storage where deterministic timing and identity binding are mandatory.

Availability

SST26VF032BT-104I/SM70SVAO is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging controllers, and smart energy meters requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant Flash memory.

Supply support for SST26VF032BT-104I/SM70SVAO 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

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The SST26VF032BT-104I/SM70SVAO belongs to Microchip's Serial Quad I/O™ (SQI™) Flash family, engineered specifically for high-performance, low-pin-count firmware and parameter storage in resource-constrained embedded systems demanding speed, security, and reliability.

FAQ

What voltage range does the SST26VF032BT-104I/SM70SVAO support for reliable operation?

The SST26VF032BT-104I/SM70SVAO operates across a single supply voltage range of 2.3 V to 3.6 V. At 2.7–3.6 V, it achieves its maximum 104 MHz clock frequency; at 2.3–3.6 V, the maximum clock drops to 80 MHz. This dual-voltage flexibility allows integration into both standard 3.3 V and ultra-low-power 2.5 V systems without external regulators or level shifters - a key advantage for battery-powered or energy-harvesting applications where the SST26VF032BT-104I/SM70SVAO serves as primary firmware storage.

How does the SST26VF032BT-104I/SM70SVAO differ from the SST26VF032BA variant?

The SST26VF032BT-104I/SM70SVAO is the SST26VF032B variant, which defaults to SPI mode at power-up: WP# and HOLD# pins are enabled, while SIO2 and SIO3 are disabled. In contrast, SST26VF032BA defaults to SQI mode (IOC=1), disabling WP#/HOLD# and enabling SIO2/SIO3. This distinction affects initial pin functionality and command initialization - the SST26VF032BT-104I/SM70SVAO requires no IOC setup for basic SPI use but must configure IOC=1 before executing SQI-specific instructions like SQOR (6BH) or SQIOR (EBH).

Does the SST26VF032BT-104I/SM70SVAO support hardware write protection, and how is it configured?

Yes, the SST26VF032BT-104I/SM70SVAO supports hardware write protection via the WP# pin, but only when enabled by both the IOC bit (set to 0) and the WPEN bit (set to 1) in the Configuration register. By default at power-up, IOC=0 and WPEN=0, so WP# is inactive. To activate it, the host must first issue WREN, then write WPEN=1 to the Configuration register. Once enabled, pulling WP# low prevents writes to the Block Protection and Configuration registers - a critical safeguard during system startup or field updates where the SST26VF032BT-104I/SM70SVAO stores immutable boot code.

What is the purpose and structure of the Security ID feature in the SST26VF032BT-104I/SM70SVAO?

The SST26VF032BT-104I/SM70SVAO includes a 2-KByte Security ID (Sec ID) area comprising a factory-programmed 64-bit unique identifier and a user-programmable segment. The factory ID is one-time programmable and cannot be altered; the user area supports standard Program Security ID (PSID) and Lockout Security ID (LSID) commands. Once LSID executes, the entire Sec ID space becomes permanently read-only. This feature enables device authentication, license binding, and secure firmware signing - directly enhancing system-level trust where the SST26VF032BT-104I/SM70SVAO serves as the root-of-trust anchor for embedded applications.

Can the SST26VF032BT-104I/SM70SVAO suspend an ongoing erase or program operation?

Yes, the SST26VF032BT-104I/SM70SVAO supports write-suspend functionality via the WRSU command. When issued during an active Program or Erase operation, it halts the internal process, allowing immediate access to other memory regions for urgent reads or writes. The suspended operation can be resumed using WRRE. Status bits WSP (Write Suspend-Program) and WSE (Write Suspend-Erase) in the STATUS register indicate suspension state. This capability is essential in real-time systems where the SST26VF032BT-104I/SM70SVAO must maintain responsiveness during firmware updates without compromising data integrity or timing deadlines.