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M87C257-80XC1X Datasheet(PDF) 6 Page - STMicroelectronics

Part # M87C257-80XC1X
Description  ADDRESS LATCHED 256K 32K x 8 UV EPROM and OTP EPROM
Download  13 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M87C257-80XC1X Datasheet(HTML) 6 Page - STMicroelectronics

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background image
Symbol
Alt
Parameter
Test
Condition
M87C257
Unit
-90
-10
-12
-15/-20
Min Max Min Max Min Max Min Max
tAVQV
tACC
Address Valid to
Output Valid
E = VIL, G = VIL
90
100
120
150
ns
tAVASL
tAL
Address Valid to
Address Strobe Low
7
777
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
90
100
120
150
ns
tGLQV
tOE
Output Enable Low to
Output Valid
E = VIL
40
40
50
60
ns
tEHQZ
(2)
tDF
Chip Enable High to
Output Hi-Z
G = VIL
0400
30040040
ns
tGHQZ
(2)
tDF
Output Enable High to
Output Hi-Z
E = VIL
0400
30040040
ns
tAXQX
tOH
Address Transition to
Output Transition
E = VIL, G = VIL
0
000
ns
Notes: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
Table 8B. Read Mode AC Characteristics (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)
AI00931
tAXQX
tEHQZ
DATA OUT
A0-A14
E
G
Q0-Q7
tASLAX
tGHQZ
tGLQV
tELQV
VALID
Hi-Z
tAVQV
tASLGL
tASHASL
tAVASL
ASVPP
Figure 5. Read Mode AC Waveforms
6/13
M87C257


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