GENERAL DESCRIPTION
The MX29LV640BT/BB is a 64-mega bit Flash memory organized as 8M bytes of 8 bits or 4M words of 16 bits. MXIC's Flash memories offer the most cost-effective and reliable read/write non-volatile random access memory. The MX29LV640BT/BB is packaged in 48-pin TSOP and 63-ball CSP. It is designed to be reprogrammed and erased in system or in standard EPROM programmers.

FEATURES
GENERAL FEATURES
• Single Power Supply Operation
- 2.7 to 3.6 volt for read, erase, and program operations
• 8,388,608 x 8 / 4,194,304 x 16 switchable
• Sector structure
   - 8KB (4KW) x 8 and 64KB(32KW) x 127
• Sector Protection/Chip Unprotect
   - Provides sector group protect function to prevent program or erase operation in the protected sector group
   - Provides chip unprotect function to allow code changes
   - Provides temporary sector group unprotect function
for code changes in previously protected sector groups
• Secured Silicon Sector
   - Provides a 128-word area for code or data that can be permanently protected.
   - Once this sector is protected, it is prohibited to program or erase within the sector again.
• Latch-up protected to 250mA from -1V to Vcc + 1V
• Low Vcc write inhibit is equal to or less than 1.5V
• Compatible with JEDEC standard
   - Pin-out and software compatible to single power supply Flash

PERFORMANCE
• High Performance
   - Fast access time: 90/120ns
   - Fast program time: 11us/word, 45s/chip (typical)
   - Fast erase time: 0.9s/sector, 45s/chip (typical)
• Low Power Consumption
   - Low active read current: 9mA (typical) at 5MHz
   - Low standby current: 0.2uA (typ.)
• Minimum 100,000 erase/program cycle
• 10 years data retention