The AT25SL641-SHE-T from Renesas Electronics Operations Services Limited is a 64 Mbit SLC NOR flash memory Integrated Circuit with SPI, Quad I/O and QPI support, rated at 133 MHz with a 6 ns access time, in an 8-SOIC package, with a 1.8 V rating (1.7 V to 2 V range) and a -40 value.