M27V102 データシートの表示（PDF） - STMicroelectronics
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M27V102 Datasheet PDF : 15 Pages
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M27V102
Table 8B. Read Mode AC Characteristics (1)
(TA = 0 to 70 °C or –40 to 85 °C; VCC = 3.3V ± 10%; VPP = VCC)
Symbol Alt
Parameter
M27V102
Test Condition -120
-150
-200
Unit
Min Max Min Max Min Max
tAVQV tACC Address Valid to Output Valid
E = VIL, G = VIL
120
150
200 ns
tELQV
tCE Chip Enable Low to Output Valid
G = VIL
120
150
200 ns
tGLQV
tEHQZ (2)
tGHQZ (2)
tOE Output Enable Low to Output Valid
tDF Chip Enable High to Output Hi-Z
tDF Output Enable High to Output Hi-Z
E = VIL
G = VIL
E = VIL
50
60
90 ns
0 40 0 50 0 70 ns
0 40 0 50 0 70 ns
tAXQX
tOH
Address Transition to Output
Transition
E = VIL, G = VIL 0
0
0
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.
Figure 5. Read Mode AC Waveforms
A0-A15
E
G
Q0-Q15
VALID
tAVQV
tGLQV
tELQV
tAXQX
VALID
tEHQZ
tGHQZ
Hi-Z
AI00705B
Programming
The M27V102 has been designed to be fully com-
patible with the M27C1024 and has the same
elecronic signature. As a result the M27V102 can
be programmed as the M27C1024 on the same
programming equipments applying 12.75V on VPP
and 6.25V on VCC by the use of the same PRESTO
II algorithm. When delivered (and after each ’1’s
erasure for UV EPROM), all bits of the M27V102
are in the ’1’ state. Data is introduced by selectively
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
ultraviolet light (UV EPROM). The M27V102 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 levels required for the
address and data inputs are TTL. VCC is specified
to be 6.25V ± 0.25V.
6/15
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