©2011 Silicon Storage Technology, Inc.

S71295-06-000

02/11

2

4 Mbit SPI Serial Flash

SST25VF040B

Data Sheet

A Microchip Technology Company

Product Description

The 25 series Serial Flash family features a four-wire, SPI-compatible interface that allows for a low

pin-count package which occupies less board space and ultimately lowers total system costs. The

SST25VF040B devices are enhanced with improved operating frequency and even lower power con-

sumption. SST25VF040B SPI serial flash memories are manufactured with SST proprietary, high-per-

formance CMOS SuperFlash technology. The split-gate cell design and thick-oxide tunneling injector

attain better reliability and manufacturability compared with alternate approaches.

The SST25VF040B devices significantly improve performance and reliability, while lowering power

consumption. The devices write (Program or Erase) with a single power supply of 2.7-3.6V for

SST25VF040B. The total energy consumed is a function of the applied voltage, current, and time of

application. Since for any given voltage range, the SuperFlash technology uses less current to pro-

gram and has a shorter erase time, the total energy consumed during any Erase or Program operation

is less than alternative flash memory technologies.

The SST25VF040B device is offered in an 8-lead SOIC (200 mils), 8-lead SOIC (150 mils), and 8-con-

tact WSON (6mm x 5mm) packages. See Figure 2 for pin assignments.