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M27C2001-10XB1TR Datasheet(PDF) 6 Page - STMicroelectronics |
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M27C2001-10XB1TR Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 16 page M27C2001 6/16 Figure 5. Read Mode AC Waveforms AI00719B tAXQX tEHQZ A0-A17 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 =5V ± 5% or 5V ± 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 M27V2001 Unit -10 -12 -15/-20/-25 Min Max Min Max Min Max tAVQV tACC Address Valid to Output Valid E= VIL,G = VIL 100 120 150 ns tELQV tCE Chip Enable Low to Output Valid G= VIL 100 120 150 ns tGLQV tOE Output Enable Low to Output Valid E= VIL 50 50 60 ns tEHQZ (2) tDF Chip Enable High to Output Hi-Z G= VIL 030 0 40050 ns tGHQZ (2) tDF Output Enable High to Output Hi-Z E= VIL 030 0 40050 ns tAXQX tOH Address Transition to Output Transition E= VIL,G = VIL 00 0 ns Programming When delivered (and after each erasure for UV EPROM), all bits of the M27C2001 are in the ’1’ state. Data is introduced by selectively program- ming ’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 exposition to ultravio- let light (UV EPROM). The M27C2001 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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