Purpose
Eon Silicon Solution Inc. (hereinafter called “Eon”) is going to provide its products’ top marking on ICs with < cFeon > from January 1st, 2009, and without any change of the part number and the compositions of the ICs. Eon is still keeping the promise of quality for all the products with the same as that of Eon delivered before. Please be advised with the change and appreciate your kindly cooperation and fully support Eon’s product family.

GENERAL DESCRIPTION
The EN25F40 is a 4M-bit (512K-byte) Serial Flash memory, with advanced write protection mechanisms, accessed by a high speed SPI-compatible bus. The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction.
The EN25F40 is designed to allow either single Sector/Block at a time or full chip erase operation. The EN25F40 can be configured to protect part of the memory as the software protected mode. The device can sustain a minimum of 100K program/erase cycles on each sector or block.

FEATURES
• Single power supply operation
   - Full voltage range: 2.3 ~ 3.6 volt
• Serial Interface Architecture
   - SPI Compatible: Mode 0 and Mode 3
• 4 Mbit Serial Flash
   - 4 M-bit/512 K-byte/2048 pages
   - 256 bytes per programmable page
• High performance
   - 100MHz clock rate for 2.7~ 3.6 volt
   - 75MHz clock rate for 2.3 ~ 3.6 volt
• Low power consumption
   - 12 mA typical active current
   - 1 mA typical power down current
• Uniform Sector Architecture:
   - 128 sectors of 4-Kbyte
   - 8 blocks of 64-Kbyte
   - Any sector or block can be erased individually
• 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: 1.3ms typical
   - Sector erase time: 90ms typical
   - Block erase time 500ms typical
   - Chip erase time: 3.5 seconds typical
• Lockable 256 byte OTP security sector
• Minimum 100K endurance cycle
• Package Options
   - 8 pins SOP 150mil body width
   - 8 pins SOP 200mil body width
   - 8 contact VDFN
   - 8 pins PDIP
   - All Pb-free packages are RoHS compliant
• Commercial and industrial temperature Range