M27V101
Table 8B. Read Mode AC Characteristics (1)
(TA = 0 to 70°C or –40 to 85 °C; VCC = 3.3V ± 10%; VPP = Vcc)
M27V201
Symbol Alt
Parameter
Test Conditi on
-120
-150
Min Max Min Max
tAVQV
tACC
Address Valid to Output
Valid
E = VIL, G = VIL
120
150
tELQV
tCE
Chip Enable Low to
Output Valid
G = VIL
120
150
tGLQV
tOE
Output Enable Low to
Output Valid
E = VIL
50
60
tEHQZ (2)
tDF
Chip Enable High to
Output Hi-Z
G = VIL
0
40
0
50
tGHQZ (2)
tDF
Output Enable High to
Output Hi-Z
E = VIL
0
40
0
50
tAXQX
tOH
Address Transition to
Output Transition
E = VIL, G = VIL
0
0
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
-200
Min Max
200
200
90
0
70
0
70
0
Unit
ns
ns
ns
ns
ns
ns
Figure 5. Read Mode AC Waveforms
A0-A16
E
G
Q0-Q7
tAVQV
VALID
tGLQV
tELQV
tAXQX
tEHQZ
tGHQZ
DATA OUT
Hi-Z
AI00713
Programming
The M27V101 has been designed to be fully com-
patible with the M27C1001 and has the same elec-
tronic signature. As a result the M27V101 can be
programmed as the M27C1001 on the same pro-
gramming equipments applying 12.75V on VPP
and 6.25V on VCC by the use of the same PRES-
TO II algorithm. When delivered (and after each
erasure for UV EPROM), all bits of the M27V101
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 exposition to
ultraviolet light (UV EPROM). The M27V101 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 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.
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