The IS25CD512/010 and IS25LD020 are 512Kbit/ 1Mbit / 2Mbit Serial Peripheral Interface （SPI） Flash memories， providing single- or dual-output. The devices are designed to support a 33 MHz clock rate in normal read mode， and 100 MHz in fast read， the fastest in the industry. The devices use a single low voltage power supply， wide operating voltage ranging to perform read， erase and program operations. The devices can be programmed in standard EPROM programmers. The IS25CD512/010 and IS25LD020 are accessed through a 4-wire SPI Interface consisting of Serial Data Input/Output （SlO）， Serial Data Output （SO）， Serial Clock （SCK）， and Chip Enable （CE#） pins. They comply with all recognized command codes and operations. The dual-output fast read operation provides and effective serial data rate of 200MHz. The devices support page program mode， where 1 to 256 bytes data can be programmed into the memory in one program operation. These devices are divided into uniform 4 KByte sectors or uniform 32 KByte blocks.（IS25LD020 is uniform 4 KByte sectors or uniform 64 KByte）。 The IS25CD512/010 and IS25LD020 are manufactured on pFLASH?’s advanced non-volatile technology. The devices are offered in a variety of packages for all critical needs. The devices operate at wide temperatures between -40°C to +105°C.