SPI NOR flash 
P/NDensityOrgVccSpeed @>3.0VDatasheet
T25S512 512k 64k x 8 2.7V-3.6V 108 MHz T25S512.pdf
T25S10 1M 128k x 8 2.7V-3.6V 108 MHz T25S10.pdf
T25S40 4M 512k x 8 2.7V-3.6V 108 MHz T25S40.pdf
T25S80 8M 1024k x 8 2.7V-3.6V 108 MHz T25S80.pdf
T25S16 16M 2048k x 8 2.7V-3.6V 108 MHz T25S16.pdf
T25S32 32M 4096k x 8 2.7V-3.6V 108 MHz T25S32.pdf