General Description
The S25FL204K (4-Mbit, 512-kbyte) Serial Flash memory, with advanced write protection mechanisms. TheS25FL204K supports the standard Serial Peripheral Interface (SPI), and a high performance Dual output using SPI pins: Serial Clock, Chip Select, Serial SI/IO0, SO, WP# and HOLD#. SPI clock frequencies of up to 85 MHz are supported along with a clock rate of 85 MHz for Dual Output Read.
The S25FL204K array is organized into 2048 programmable pages of 256 bytes each. Up to 256 bytes can be programmed at a time. Pages can be erased in groups of 16 (4 kB Sector Erase), groups of 256 (64 kB Block Erase) or the entire chip (Chip Erase). The S25FL204K has128 erasable sectors and 8 erasable blocks. The small 4 kB sectors allow for greater flexibility in applications that require data and parameter storage.
A Hold pin, Write Protect Pin and programmable write protection provide further control flexibility. Additionally, the S25FL204K device supports JEDEC standard manufacturer and device identification.

Distinctive Features
■ Single power supply operation
   – Full voltage range: 2.7 to 3.6V
■ 4-Mbit Serial Flash
   – 4-Mbit/512 kbyte/2048 pages
   – 256 bytes per programmable page
   – Uniform 4-kbyte Sectors/64-kbyte Blocks
■ Standard and Dual
   – Standard SPI: SCK, CS#, SI, SO, WP#, HOLD#
   – Dual SPI: SCK, CS#, SI/IO0, SO, WP#, HOLD#
   – Fast Read Dual Output instruction
   – Auto-increment Read capability
■ High Performance
   – FAST READ (Serial): 85 MHz clock rate
   – DUAL OUTPUT READ: 85 MHz clock rate
■ Low Power Consumption
   – 12 mA typical active current
   – 15 µA typical standby current
■ Flexible Architecture with 4 kB Sectors
   – Sector Erase (4 kB)
   – Block Erase (64 kB)
   – Page Program up to 256 bytes
   – 100k erase/program cycles typical
   – 20-year data retention typical
■ 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: 1.5 ms typical
   – Sector erase time (4 kB): 50 ms typical
   – Block erase time (64 kB): 500 ms typical
   – Chip erase time: 3.5 seconds typical
■ Package Options
   – 8-pin SOIC 150/208-mil
   – All Pb-free packages are RoHS compliant