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M27C516 Datasheet(PDF) 6 Page - STMicroelectronics |
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M27C516 Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 12 page Programming When delivered, all bits of the M27C516 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 M27C516 is in the programming mode when VPP input is at 12.75V,E is at VIL and P is pulsed to VIL. The data to be programmed is applied to 16 bits in parallel to the data output pins. The evels required for the ad- dress and data inputs are TTL. VCC is specified to be 6.25V ±0.25V. AI00935B tAXQX tEHQZ A0-A14 E G Q0-Q15 tAVQV tGHQZ tGLQV tELQV VALID Hi-Z VALID Figure 5. Read Mode AC Waveforms Symbol Alt Parameter Test Condition M27C516 Unit -70 (3) -85/-10 Min Max Min Max tAVQV tACC Address Valid to Output Valid E = VIL,G = VIL 70 85 ns tELQV tCE Chip Enable Low to Output Valid G = VIL 70 85 ns tGLQV tOE Output Enable Low to Output Valid E = VIL 35 35 ns tEHQZ (2) tDF Chip Enable High to Output Hi-Z G = VIL 0 20 0 30 ns tGHQZ (2) tDF Output Enable High to Output Hi-Z E = VIL 0 20 0 30 ns tAXQX tOH Address Transition to Output Transition E=VIL,G = VIL 00 ns Notes: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP. 2. Sampled only, not 100% tested. 3. Speed obtained with a load capacitance of 60pF 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) 6/12 M27C516 |
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