ZD25D20 Datasheet | Zetta

FEATURES Single power supply operation - Full voltage range: 2.7-3.6 volt 4 Mbit Serial Flash - 4 M-bit/512 K-byte, 2 M-bit/256 K-byte - 256 bytes per programmable page - Uniform 4K-byte Sectors/64K-byte Blocks Standard and Dual - Standard SPI: CLK, CS#, DI, DO, WP#, - Dual SPI: CLK, CS#, DIO, DO, WP#, - Fast Read Dual Output instruction - Auto-increment Read capability High performance - 85MHz clock rate for one data bit - 80MHz clock rate for two data bits Low power consumption - 8 m A typical active current - 1 u A typical power down current Flexible Architecture with 4KB sectors - Sector Erase (4K-bytes) - Block Erase (64K-bytes) - Page Program up to 256 bytes - More than 100K erase/write cycles - More than 20-year data retention Software and Hardware Write Protection: - Write Protect all or portion of memory via software - Enable/Disable protection with WP# pin High performance program/erase speed - Page program time: 0.9ms typical - Sector erase time: 50ms typical - Block erase time: 300ms typical - Chip erase time: 2 Seconds typical(25D40) - Chip erase time: 1 Seconds typical(25D20) Package Options - 8-pin SOIC 150/208-mil - 8-pad USON8 3x2-mm - 8-pin TSSOP8 173-mil - All Pb-free packages are Ro HS pliant GENERAL DESCRIPTION The 25D40/20 is a 4 Megabit (512K-byte) / 2 Megabit (256K-byte) Serial Flash memory, with advanced write protection mechanisms. The 25D40/20 supports the standard Serial Peripheral Interface (SPI), and a high performance Dual output using SPI pins: Serial Clock, Chip Select, Serial DIO, DO, WP#. SPI clock frequencies of up to 85MHz are supported. The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction. The 25D40/20 also offers a sophisticated method for protecting individual blocks against erroneous or malicious program and erase operations. By providing the ability to individually protect and unprotect blocks, a system can unprotect a specific block to modify its contents while keeping the remaining...