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M87C257 датащи(PDF) 15 Page - STMicroelectronics

номер детали M87C257
подробное описание детали  Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM
PDF  22 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M87C257 датащи(HTML) 15 Page - STMicroelectronics

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M87C257
DC and AC parameters
15/22
Table 9.
Read mode AC characteristics 1(1) (2)
1.
TA = 0 to 70 °C, –40 to 85 °C; –40 to 105 °C or –40 to 125 °C; VCC = 5V ± 5% or 5V ± 10%; VPP = VCC
2.
VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
Symbol Alt
Parameter
Test
Condition
M87C257
Unit
-45(3)
3.
Speed obtained with High Speed AC measurement conditions.
-60
-70
-80
Min Max Min Max Min Max Min Max
tAVQV
tACC
Address Valid to
Output Valid
E = VIL,
G = VIL
45
60
70
80
ns
tAVASL
tAL
Address Valid to
Address Strobe Low
777
7
ns
tASHASL tLL
Address Strobe High
to Address Strobe Low
35
35
35
35
ns
tASLAX
tLA
Address Strobe Low to
Address Transition
20
20
20
20
ns
tASLGL tLOE
Address Strobe Low to
Output Enable Low
20
20
20
20
ns
tELQV
tCE
Chip Enable Low to
Output Valid
G = VIL
45
60
70
80
ns
tGLQV
tOE
Output Enable Low to
Output Valid
E = VIL
25
30
35
40
ns
tEHQZ
(4)
4.
Sampled only, not 100% tested.
tDF
Chip Enable High to
Output Hi-Z
G = VIL
0250300
30
040
ns
tGHQZ
(4)
tDF
Output Enable High to
Output Hi-Z
E = VIL
0250300
30
040
ns
tAXQX
tOH
Address Transition to
Output Transition
E = VIL,
G = VIL
000
0
ns



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