Philco PH-919 Service Manual page 21

• Sector protection
- Sector protect/chip unprotect for 5V/12V system.
- Hardware method to disable any combination of
sectors from program or erase operations
- Tempory sector unprotect allows code changes in
previously locked sectors.
• 100,000 minimum erase/program cycles
• Latch-up protected to 100mA from -1V to VCC+1V
• Boot Code Sector Architecture
- T = Top Boot Sector
- B = Bottom Boot Sector
• Low VCC write inhibit is equal to or less than 3.2V
• Package type:
- 44-pin SOP
- 48-pin TSOP
• Compatibility with JEDEC standard
- Pinout and software compatible with single-power
supply Flash
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