M87C257-12F1 STMicroelectronics, M87C257-12F1 Datasheet - Page 15

• Manufacturer Part Number: M87C257-12F1
• Description: IC EPROM 256KBIT 120NS 28CDIP
• Manufacturer: STMicroelectronics

Specifications of M87C257-12F1

• Format - Memory: EPROMs
• Memory Type: UV EPROM
• Memory Size: 256K (32K x 8)
• Speed: 120ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-CDIP (0.600", 15.24mm) Window
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M87C257
Table 9.
1. T
2. V
3. Speed obtained with High Speed AC measurement conditions.
4. Sampled only, not 100% tested.
Symbol Alt
t
t
t
GHQZ
ASHASL
t
t
EHQZ
t
t
t
t
t
ASLAX
ASLGL
AVASL
AVQV
GLQV
AXQX
ELQV
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
t
t
t
ACC
LOE
t
t
t
t
t
t
CE
OE
OH
DF
DF
AL
LL
LA
Read mode AC characteristics 1
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
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
,
,
PP
Min Max Min Max Min Max Min Max
(1) (2)
and removed simultaneously or after V
7
0
0
0
-45
(3)
45
35
20
20
45
25
25
25
CC
= 5V ± 5% or 5V ± 10%; V
7
0
0
0
-60
M87C257
60
35
20
20
60
30
30
30
DC and AC parameters
35
20
20
7
0
0
0
-70
70
70
35
30
30
35
20
20
7
0
0
0
PP
PP
-80
= V
.
80
80
40
40
40
CC
15/22
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns