What is the SST25LF040A-33-4C-S2AE?

It is a 4 Mbit (512K x 8) SPI serial NOR flash memory device from Microchip (originally SST/Silicon Storage Technology), built on SuperFlash technology, rated for a 33 MHz maximum clock and supplied in a lead-free 8-lead SOIC (S2A) package.

Is the SST25LF040A-33-4C-S2AE still in production?

No. This part is obsolete (end-of-life) and is no longer manufactured. Authorized-distributor availability is minimal, which is why it is offered for RFQ through independent sourcing channels like Pacific Component Xchange.

What package does the S2AE suffix indicate?

The S2A code designates an 8-lead SOIC with a 200-mil (wide) body width, and the trailing E indicates a lead-free (Pb-free / RoHS-compliant) finish.

What voltage and speed does this flash operate at?

It operates from a single 3.0 V to 3.6 V supply for both read and write operations and supports a maximum SPI clock frequency of 33 MHz.

What is the endurance and data retention of the SST25LF040A?

The device is rated for a typical endurance of 100,000 erase/program cycles and greater than 100 years of data retention.

Can I get a quote and lead time for the SST25LF040A-33-4C-S2AE?

Yes. This is a Request-For-Quote item. Submit an RFQ to Pacific Component Xchange and our team will respond with current availability and lead time for this hard-to-find, obsolete part.

SST25LF040A-33-4C-S2AE – 4 Mbit SPI Serial NOR Flash – Microchip (SST)

The SST25LF040A-33-4C-S2AE is a 4 Mbit (512K x 8) SuperFlash SPI serial NOR flash from Microchip (formerly SST), rated 33 MHz and supplied in a lead-free 8-lead SOIC package. This obsolete, hard-to-find part is available for RFQ.

Brand:Microchip

SKU: SST25LF040A-33-4C-S2AE Categories: Electronic Parts, RFQ

Please contact us or add to quote for current pricing and availability.

The SST25LF040A-33-4C-S2AE is a 4 Mbit SPI serial NOR flash memory device built on Silicon Storage Technology’s SuperFlash split-gate cell technology and now part of the Microchip Technology portfolio following Microchip’s acquisition of SST. It delivers reliable, low-pin-count non-volatile storage over a four-wire SPI-compatible interface, making it a long-time favorite for boot code, configuration data, and firmware storage in space-constrained embedded designs. This device is obsolete (EOL) and no longer manufactured, which makes verified inventory difficult to source through authorized channels.

Key Features

Density: 4 Mbit (512K x 8) SPI serial flash
Interface: SPI-compatible serial interface supporting SPI Mode 0 and Mode 3
Maximum clock frequency: 33 MHz
Supply voltage: Single 3.0 V to 3.6 V for both read and write operations
Memory organization: Uniform 4 KByte sectors with 32 KByte overlay blocks
Endurance: 100,000 cycles (typical)
Data retention: Greater than 100 years
Temperature grade: Commercial, 0°C to +70°C (4C grade)
Package: Lead-free (Pb-free / RoHS) 8-lead SOIC, 200-mil body width (S2A)

Applications

Embedded firmware and boot code storage
FPGA and microcontroller configuration data
Set-top boxes, networking, and telecom equipment
Industrial control and instrumentation
Consumer electronics and legacy product maintenance

Why Source SST25LF040A-33-4C-S2AE from Pacific Component Xchange

Because the SST25LF040A-33-4C-S2AE is end-of-life with little to no authorized-distributor stock, locating authentic, quality inventory can be a challenge. Pacific Component Xchange is an independent distributor specializing in hard-to-find, obsolete, and end-of-life memory components. We help engineers and procurement teams keep legacy and long-lifecycle designs in production with rigorous authenticity and quality screening, global shipping, and responsive sourcing support.

Need pricing or lead time? Request a quote (RFQ) today and our sourcing specialists will respond promptly with availability for the SST25LF040A-33-4C-S2AE.

Additional Information

Manufacturer	Microchip Technology (formerly SST / Silicon Storage Technology)
Component Type	SPI Serial NOR Flash (SuperFlash)
Density	4 Mbit
Organization	512K x 8
Interface	SPI-compatible (Mode 0 and Mode 3)
Package	8-lead SOIC, 200-mil body (S2A), Pb-free
Speed/Grade	33 MHz max clock
Supply Voltage	3.0 V to 3.6 V
Temp Range	Commercial, 0°C to +70°C
Endurance	100,000 cycles (typical)
Data Retention	>100 years
Part Status	Obsolete (EOL)
Availability	Available