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M27V512-100B6TR Fiches technique(PDF) 6 Page - STMicroelectronics |
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M27V512-100B6TR Fiches technique(HTML) 6 Page - STMicroelectronics |
6 / 16 page M27V512 6/16 Figure 5. Read Mode AC Waveforms AI00735B tAXQX tEHQZ A0-A15 E G Q0-Q7 tAVQV tGHQZ tGLQV tELQV VALID Hi-Z VALID Table 8B. Read Mode AC Characteristics (1) (TA = 0 to 70 °C or –40 to 85 °C; VCC = 3.3V ± 10%; VPP =VCC)) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP. 2. Sampled only, not 100% tested. Symbol Alt Parameter Test Condition M27V512 Unit -150 -200 Min Max Min Max tAVQV tACC Address Valid to Output Valid E=VIL,G= VIL 150 200 ns tELQV tCE Chip Enable Low to Output Valid G= VIL 150 200 ns tGLQV tOE Output Enable Low to Output Valid E = VIL 50 60 ns tEHQZ (2) tDF Chip Enable High to Output Hi-Z G= VIL 0 40 0 50 ns tGHQZ (2) tDF Output Enable High to Output Hi-Z E=VIL 0 40 0 50 ns tAXQX tOH Address Transition to Output Transition E=VIL,G= VIL 00 ns Programming The M27V512 has been designed to be fully com- patible with the M27C512 and has the same elec- tronic signature. As a result the M27V512 can be programmed as the M27C512 on the same pro- gramming equipments applying 12.75V on VPP and 6.25V on VCC by the use of the same PRES- TO IIB algorithm. When delivered (and after each erasure for UV EPROM), all bits of the M27V512 are in the ’1’ state. Data is introduced by selective- ly programming ’0’s into the desired bit locations. Although 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 ul- traviolet light (UV EPROM). The M27V512 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. The M27V512 can use PRESTO IIB Programming Algorithm that drastically reduces the program- ming time (typically less than 6 seconds). Never- theless to achieve compatibility with all programming equipments, PRESTO Program- ming Algorithm can be used as well. |
Numéro de pièce similaire - M27V512-100B6TR |
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Description similaire - M27V512-100B6TR |
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