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M27C801-60N1X Datasheet(PDF) 7 Page - STMicroelectronics |
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M27C801-60N1X Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 16 page 7/16 M27C801 Table 9. Programming Mode DC Characteristics (1) (TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP. Table 10. MARGIN MODE AC Characteristics (1) (TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP. Symbol Parameter Test Condition Min Max Unit ILI Input Leakage Current VIL ≤ VIN ≤ VIH ±10 µA ICC Supply Current 50 mA IPP Program Current E = VIL 50 mA VIL Input Low Voltage –0.3 0.8 V VIH Input High Voltage 2 VCC + 0.5 V VOL Output Low Voltage IOL = 2.1mA 0.4 V VOH Output High Voltage TTL IOH = –1mA 3.6 V VID A9 Voltage 11.5 12.5 V Symbol Alt Parameter Test Condition Min Max Unit tA9HVPH tAS9 VA9 High to VPP High 2µs tVPHEL tVPS VPP High to Chip Enable Low 2µs tA10HEH tAS10 VA10 High to Chip Enable High (Set) 1µs tA10LEH tAS10 VA10 Low to Chip Enable High (Reset) 1µs tEXA10X tAH10 Chip Enable Transition to VA10 Transition 1µs tEXVPX tVPH Chip Enable Transition to VPP Transition 2µs tVPXA9X tAH9 VPP Transition to VA9 Transition 2µs Programming When delivered (and after each erasure for UV EPROM), all bits of the M27C801 are in the ’1’ state. Data is introduced by selectively program- ming ’0’s into the desired bit locations. Although only ’0’ will be programmed, both ’1’s and ’0’s can be present in the data word. The only way to change a ’0’ to a ’1’ is by die exposure to ultraviolet light (UV EPROM). The M27C801 is in the pro- gramming mode when VPP input is at 12.75V and E is pulsed to VIL. The data to be programmed is applied to 8 bits in parallel to the data output pins. The levels required for the address and data in- puts are TTL. VCC is specified to be 6.25V ± 0.25V. |
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