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M27W801-100N6TR Datenblatt(PDF) 7 Page - STMicroelectronics |
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M27W801-100N6TR Datenblatt(HTML) 7 Page - STMicroelectronics |
7 / 16 page 7/16 M27W801 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 Conditio n 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 2 µs tVPHEL tVPS VPP High to Chip Enable Low 2 µs tA10HEH tAS10 VA10 High to Chip Enable High (Set) 1 µs tA10LEH tAS10 VA10 Low to Chip Enable High (Reset) 1 µs tEXA10X tAH10 Chip Enable Transition to VA10 Transition 1 µs tEXVPX tVPH Chip Enable Transition to VPP Transition 2 µs tVPXA9X tAH9 VPP Transition to VA9 Transition 2 µs Programming The M27W801 has been designed to be fully com- patible with the M27C801 and has the same elec- tronic signature. As a result the M27W801 can be programmed as the M27C801 on the same pro- gramming equipment applying 12.75V on VPP and 6.25V on VCC by the use of the same PRESTO IIB algorithm. When delivered (and after each ‘1’s era- sure for UV EPROM), all bits of the M27W801 are in the ”1” state. Data is introduced by selectively programming ”0”s into the desired bit locations.Al- though only ’0’ will be programmed, both ”1” and ”0” can be present in the data word. The only way to change a ‘0’ to a ‘1’ is by die exposure to ultra- violet light (UV EPROM). The M27W801 is in the programming 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 inputs are TTL. VCC is specified to be 6.25V ± 0.25V. |
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Ähnliche Beschreibung - M27W801-100N6TR |
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