M27C256B-90F6 STMicroelectronics, M27C256B-90F6 Datasheet - Page 16

• Manufacturer Part Number: M27C256B-90F6
• Description: IC EPROM 256KBIT 90NS 28CDIP
• Manufacturer: STMicroelectronics

Specifications of M27C256B-90F6

• Format - Memory: EPROMs
• Memory Type: UV EPROM
• Memory Size: 256K (32K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-CDIP (0.600", 15.24mm) Window
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1656-5

DC and AC parameters
16/24
Figure 7.
Table 9.
1. T
2. V
3. Speed obtained with High Speed AC measurement conditions.
4. Sampled only, not 100% tested.
Symbol
t
t
)
EHQZ
GHQZ
t
t
t
t
AVQV
GLQV
AXQX
ELQV
Q0-Q7
A0-A14
E
G
A
CC
= 0 to 70°C, –40 to 85°C, –40 to 105°C or –40 to 125°C; V
(4)
(4)
must be applied simultaneously with or before V
t
ACC
t
t
t
Alt
t
t
OH
CE
OE
DF
DF
Read mode AC waveforms
Read mode AC characteristics
Address Valid to
Output Valid
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
tAVQV
tELQV
tGLQV
VALID
Condition
E = V
E = V
G = V
G = V
G = V
G = V
E = V
E = V
Test
IL
IL
IL
IL
IL
IL
IL
IL
,
,
Min Max Min Max Min Max Min Max
(1) (2)
PP
0
0
0
-45
and removed simultaneously or after V
(3)
45
45
25
25
25
CC
= 5V ± 5% or 5V ± 10%; V
0
0
0
-60
tAXQX
M27C256B
60
60
30
30
30
0
0
0
tGHQZ
tEHQZ
VALID
-70
70
70
35
30
30
PP
0
0
0
= V
PP
-80
M27C256B
.
CC
80
80
40
30
30
AI00758B
Hi-Z
Unit
ns
ns
ns
ns
ns
ns