M27C4002-12XJ1TR STMicroelectronics, M27C4002-12XJ1TR Datasheet - Page 6

• Manufacturer Part Number: M27C4002-12XJ1TR
• Description: 4 Mbit 256Kb x16 UV EPROM and OTP EPROM
• Manufacturer: STMicroelectronics

M27C4002
Table 8B. Read Mode AC Characteristics
(T
Figure 5. Read Mode AC Waveforms
Programming
When delivered (and after each erasure for UV
EPROM), all bits of the M27C4002 are in the ’1’
state. Data is introduced by selectively program-
ming ’0’s into the desired bit locations. Although
only ’0’s will be programmed,both ’1’s and ’0’s can
be present in the data word. The only way to
6/16
Symbol
t
t
A
EHQZ
GHQZ
t
t
t
t
AVQV
GLQV
AXQX
ELQV
= 0 to 70 C or –40 to 85 C; V
(2)
(2)
Q0-Q15
A0-A17
E
G
t
Alt
ACC
t
t
t
t
t
OH
CE
OE
DF
DF
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
CC
tAVQV
tELQV
Condition
E = V
E = V
= 5V
G = V
G = V
G = V
G = V
E = V
E = V
Test
VALID
tGLQV
IL
IL
IL
IL
IL
IL
IL
IL
,
,
(1)
5% or 5V
Min
0
0
0
-10
Max
100
100
change a ’0’ to a ’1’ is by die exposure to ultraviolet
light (UV EPROM). The M27C4002 is in the pro-
gramming mode when V
at V
programmed is applied to 16 bits in parallel to the
data output pins. The levels required for the ad-
dress and data inputs are TTL. V
be 6.25V
50
30
30
10%; V
IH
Min
and E is pulsed to V
0
0
0
PP
-12
tAXQX
= V
0.25V.
Max
M27C4002
120
120
60
40
40
CC
)
tEHQZ
tGHQZ
Min
VALID
0
0
0
-15
PP
Max
150
150
60
50
50
input is at 12.75V, G is
IL
. The data to be
Min
CC
0
0
0
AI00731B
-20
is specified to
Hi-Z
Max
200
200
70
80
80
Unit
ns
ns
ns
ns
ns
ns