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M27W101-120B6TR Datasheet(PDF) 7 Page - STMicroelectronics |
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M27W101-120B6TR Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 15 page  7/15 M27W101 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. Programming 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. 2. Sampled only, not 100% tested. 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 = –400µA 2.4 V VID A9 Voltage 11.5 12.5 V Symbol Alt Parameter Test Condi tion Min Max Unit tAVPL tAS Address Valid to Program Low 2 µs tQVPL tDS Input Valid to Program Low 2 µs tVPHPL tVPS VPP High to Program Low 2 µs tVCHPL tVCS VCC High to Program Low 2 µs tELPL tCES Chip Enable Low to Program Low 2 µs tPLPH tPW Program Pulse Width 95 105 µs tPHQX tDH Program High to Input Transition 2 µs tQXGL tOES Input Transition to Output Enable Low 2 µs tGLQV tOE Output Enable Low to Output Valid 100 ns tGHQZ (2) tDFP Output Enable High to Output Hi-Z 0 130 ns tGHAX tAH Output Enable High to Address Transition 0ns Programming The M27W101 has been designed to be fully com- patible with the M27C1001 and has the same elec- tronic signature. As a result the M27W101 can be programmed as the M27C1001 on the same pro- gramming equipment applying 12.75V on VPP and 6.25V on VCC using the same PRESTO II algo- rithm. When delivered (and after each ‘1’s erasure for UV EPROM), all bits of the M27W101 are in the ’1’ state. Data is introduced by selectively pro- gramming ’0’s into the desired bit locations. Al- though only ’0’s 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 ultra- violet light (UV EPROM). The M27W101 is in the programming mode when VPP input is at 12.75V, Eis at VIL and P 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 ad- dress and data inputs are TTL. VCC is specified to be 6.25V ± 0.25V. |
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