M87C257 STMICROELECTRONICS [STMicroelectronics], M87C257 Datasheet - Page 6

• Manufacturer Part Number: M87C257
• Description: ADDRESS LATCHED 256K 32K x 8 UV EPROM and OTP EPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M87C257
Table 8B. Read Mode AC Characteristics
(T
Notes: 1. V
Figure 5. Read Mode AC Waveforms
6/13
Symbol
t
t
t
GHQZ
A
EHQZ
t
ASHASL
t
t
t
t
t
t
ASLAX
ASLGL
AVASL
AVQV
GLQV
AXQX
ELQV
= 0 to 70 C, –40 to 85 C, –40 to 105 C or –40 to 125 C; V
2. Sampled only, not 100% tested.
(2)
(2)
CC
A0-A14
ASV PP
E
G
Q0-Q7
must be applied simultaneously with or before V
t
t
Alt
ACC
t
t
t
t
t
LOE
t
t
t
OE
OH
CE
DF
DF
AL
LL
LA
Address Valid to
Output Valid
Address Valid to
Address Strobe Low
Address Strobe High
to Address Strobe Low
Address Strobe Low to
Address Transition
Address Strobe Low
to Output Enable Low
Chip Enable Low to
Output Valid
Output Enable Low to
Output Valid
Chip Enable High to
Output Hi-Z
Output Enable High to
Output Hi-Z
Address Transition to
Output Transition
Parameter
VALID
tAVASL
tASHASL
tAVQV
tELQV
tASLGL
E = V
E = V
tGLQV
Condition
tASLAX
G = V
G = V
E = V
E = V
(1)
Test
IL
IL
PP
, G = V
, G = V
and removed simultaneously or after V
IL
IL
IL
IL
IL
IL
Min Max Min Max Min Max Min Max
35
20
20
7
0
0
0
-90
CC
90
90
40
40
40
DATA OUT
= 5V
35
20
20
7
0
0
0
tAXQX
-10
5% or 5V
tGHQZ
tEHQZ
M87C257
100
100
40
30
30
PP
.
35
20
20
7
0
0
0
-12
120
120
10%; V
50
40
40
AI00931
35
20
20
7
0
0
0
-15/-20
Hi-Z
PP
= V
150
150
60
40
40
CC
Unit
)
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns