DESCRIPTION
The A25D40 is 4M-bit Serial Peripheral Interface (SPI) Flash memory, and supports the Dual SPI: Serial Clock, Chip Select, Serial Data I/O0 (SI), I/O1 (SO). The Dual Output data is transferred with speed of 108Mbits/s. The device uses a single low voltage power supply, ranging from 2.7 Volt to 3.6 Volt.

FEATURES
● Serial Peripheral Interface (SPI)
   -Standard SPI: SCLK, /CS, SI, SO, /WP
   -Dual SPI: SCLK, /CS, IO0, IO1, /WP
● Read
   -Normal Read (Serial): 55MHz clock rate
   -Fast Read (Serial): 108MHz clock rate
   -Dual Read: 108MHz clock rate
● Program
   -Serial-input Page Program up to 256bytes
● Erase
   -Block erase (64/32 kB)
   -Sector erase (4 kB)
   -Chip erase
● Program/Erase Speed
   -Page Program time: 0.7ms typical
   -Sector Erase time: 100ms typical
   -Block Erase time: 0.3/0.5s typical
   -Chip Erase time: 3s typical
● Flexible Architecture
   -Sector of 4k-byte
   -Block of 32/64k-byte
● Low Power Consumption
   -20mA maximum active current
   -5uA maximum power down current
● Software/Hardware Write Protection
   -Enable/Disable protection with WP Pin
   -Write protect all/portion of memory via software
   -Top or Bottom, Sector or Block selection
● Single Supply Voltage
   -Full voltage range: 2.7~3.6V
● Temperature Range
   -Commercial (0℃ to +70℃)
   -Industrial (-40℃ to +85℃)
● Cycling Endurance/Data Retention
   -Typical 100k Program-Erase cycles on any
   sector
   -Typical 20-year data retention at +55℃
● Available in SOP8, TSSOP8 and DFN8(2x3)
   packages