GENERAL DESCRIPTION
The W29C022 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K x 8 bits. The device can be written (erased and programmed) in-system with a standard 5V power supply. A 12-volt VPP is not required. The unique cell architecture of the W29C022 results in fast write (erase/ program) operations with extremely low current consumption compared to other comparable 5-volt flash memory products. The device can also be written (erased and programmed) by using standard EPROM programmers.

FEATURES
• Single 5-volt write (erase and program) operations
• Fast page-write operations
    - 128 bytes per page
    - Page write (erase/program) cycle: 10 mS (max.)
    - Effective byte-write (erase/program) cycle time: 39μS
    - Optional software-protected data write
• Fast chip-erase operation: 50 mS
• Two 8 KB boot blocks with lockout
• Typical page write (erase/program) cycles: 1K
• Ten-year data retention
• Software and hardware data protection
• Low power consumption
    - Active current: 25 mA (typ.)
    - Standby current: 20 μA (typ.)
• Automatic write (erase/program) timing with internal VPP generation
• End of write (erase/program) detection
    - Toggle bit
    - Data polling
• Latched address and data
• All inputs and outputs directly TTL compatible
• JEDEC standard byte-wide pinouts