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M27W512-200F6TR Scheda tecnica(PDF) 7 Page - STMicroelectronics

Il numero della parte M27W512-200F6TR
Spiegazioni elettronici  512 Kbit 64Kb x8 Low Voltage UV EPROM and OTP EPROM
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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M27W512
Table 9. Programming Mode DC Characteristics (1)
(TA =25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
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)
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
Symbol
Parameter
Test Condition
Min
Max
Unit
ILI
Input Leakage Current
VIL ≤ VIN ≤ VIH
±10
µA
ICC
Supply Current
50
mA
IPP
Program Current
E=VIL
50
mA
VIL
Input Low Voltage
–0.3
0.8
V
VIH
Input High Voltage
2
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
VOH
Output High Voltage TTL
IOH = –1mA
3.6
V
VID
A9 Voltage
11.5
12.5
V
Symbol
Alt
Parameter
Test Condition
Min
Max
Unit
tA9HVPH
tAS9
VA9 High to VPP High
2
µs
tVPHEL
tVPS
VPP High to Chip Enable Low
2
µs
tA10HEH
tAS10
VA10 High to Chip Enable High (Set)
1
µs
tA10LEH
tAS10
VA10 Low to Chip Enable High (Reset)
1
µs
tEXA10X
tAH10
Chip Enable Transition to VA10 Transition
1
µs
tEXVPX
tVPH
Chip Enable Transition to VPP Transition
2
µs
tVPXA9X
tAH9
VPP Transition to VA9 Transition
2
µs
Programming
The M27W512 has been designed to be fully com-
patible with the M27C512 and has the same elec-
tronic signature. As a result the M27W512 can be
programmed as the M27C512 on the same pro-
gramming equipment applying 12.75V on VPP and
6.25V on VCC. The M27W512 can use PRESTO
IIB Programming Algorithm that drastically reduc-
es the programming time. Nevertheless to achieve
compatibility with all programming equipments,
PRESTO II Programming Algorithm can be used
as well. When delivered (and after each ‘1’s era-
sure for UV EPROM), all bits of the M27W512 are
in the ’1’ state. Data is introduced by selectively
programming ’0’s into the desired bit locations. Al-
though 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’s by die exposure to ultravi-
olet light (UV EPROM). The M27W512 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.


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