M27V801 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M27V801 Datasheet PDF : 16 Pages
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M27V801
Table 9. Programming Mode DC Characteristics (1)
(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Symbol
Parameter
Test Conditio n
Min
Max
ILI
Input Leakage Current
VIL ≤ VIN ≤ VIH
±10
ICC
Supply Current
50
IPP
Program Current
E = VIL
50
VIL
Input Low Voltage
–0.3
0.8
VIH
Input High Voltage
2.4
VCC + 0.5
VOL
Output Low Voltage
IOL = 2.1mA
0.4
VOH Output High Voltage TTL
IOH = –1mA
3.6
VID
A9 Voltage
11.5
12.5
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
Table 10. MARGIN MODE AC Characteristics (1)
(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Symbol
Alt
Parameter
Test Condition Min
tA9HVPH
tAS9 VA9 High to VPP High
2
tVPHEL
tVPS VPP High to Chip Enable Low
2
tA10 HEH
tAS10 VA10 High to Chip Enable High (Set)
1
tA10LEH
tAS10 VA10 Low to Chip Enable High (Reset)
1
tEXA10X
tAH10 Chip Enable Transition to VA10 Transition
1
tEXVPX
tVPH Chip Enable Transition to VPP Transition
2
tVPXA9X
tAH9 VPP Transition to VA9 Transition
2
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
Max
Unit
µA
mA
mA
V
V
V
V
V
Unit
µs
µs
µs
µs
µs
µs
µs
Programming
The M27V801 has been designed to be fully com-
patible with the M27C801 and has the same elec-
tronic signature. As a result the M27V801 can be
programmed as the M27C801 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 M27V801
are in the ’1’ state. Data is introduced by selective-
ly programming ’0’s into the desired bit locations.
Although only ’0’ will be programmed, both ’1’ and
’0’ can be present in the data word. The only way
to change a ’0’ to a ’1’ is by die exposure to ultravi-
olet light (UV EPROM). The M27V801 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 M27V801 can use PRESTO IIB Programming
Algorithm that drastically reduces the program-
ming time (typically 52 seconds). Nevertheless to
achieve compatibility with all programming equip-
ments, PRESTO Programming Algorithm can be
used.
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