M87C257-10C1X View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M87C257-10C1X Datasheet PDF : 13 Pages
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M87C257
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)
Symbol Alt
Parameter
tAVQV
tAVASL
tACC
Address Valid to
Output Valid
tAL
Address Valid to
Address Strobe Low
Test
Condition
E = VIL, G = VIL
M87C257
-90
-10
-12
-15/-20 Unit
Min Max Min Max Min Max Min Max
90
100
120
150 ns
7
7
7
7
ns
tASHASL
tLL
Address Strobe High
to Address Strobe Low
35
35
35
35
ns
tASLAX
tASLGL
tELQV
tLA
Address Strobe Low to
Address Transition
tLOE
Address Strobe Low
to Output Enable Low
tCE
Chip Enable Low to
Output Valid
G = VIL
20
20
20
20
ns
20
20
20
20
ns
90
100
120
150 ns
tGLQV
tEHQZ (2)
tGHQZ (2)
tOE
Output Enable Low to
Output Valid
tDF
Chip Enable High to
Output Hi-Z
tDF
Output Enable High to
Output Hi-Z
E = VIL
G = VIL
E = VIL
40
40
50
60 ns
0 40 0 30 0 40 0 40 ns
0 40 0 30 0 40 0 40 ns
tAXQX
tOH
Address Transition to
Output Transition
E = VIL, G = VIL
0
0
0
Notes: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
0
ns
Figure 5. Read Mode AC Waveforms
A0-A14
ASVPP
E
G
Q0-Q7
VALID
tAVASL
tASLAX
tASHASL
tASLGL
tAVQV
tGLQV
tELQV
tAXQX
tEHQZ
tGHQZ
DATA OUT
Hi-Z
AI00931
6/13
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