M27C4001-80XC6X STMicroelectronics, M27C4001-80XC6X Datasheet - Page 6

• Manufacturer Part Number: M27C4001-80XC6X
• Description: 4 Mbit 512Kb x 8 UV EPROM and OTP EPROM
• Manufacturer: STMicroelectronics

M27C4001
Table 8B. Read Mode AC Characteristics
(T
Note: 1. V
Figure 5. Read Mode AC Waveforms
Programming
When delivered (and after each erasure for UV
EPROM), all bits of the M27C4001 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
t
t
Symbol
A
GHQZ
EHQZ
t
t
t
t
AVQV
ELQV
GLQV
AXQX
= 0 to 70 C or –40 to 85 C; V
2. Sampled only, not 100% tested.
(2)
(2)
CC
Q0-Q7
A0-A18
E
G
must be applied simultaneously with or before V
t
t
t
Alt
ACC
t
t
t
CE
OE
OH
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
= 5V
tGLQV
VALID
Test Conditi on
E = V
E = V
(1)
5% or 5V
G = V
G = V
E = V
E = V
PP
IL
IL
, G = V
, G = V
and removed simultaneously or after V
IL
IL
IL
IL
change a ’0’ to a ’1’ is by die exposition to ultravio-
let light (UV EPROM). The M27C4001 is in the
programming mode when V
G is at V
programmed is applied to 8 bits in parallel to the
data output pins. The levels required for the ad-
dress and data inputs are TTL. V
be 6.25V
IL
IL
10%; V
Min
0
0
0
-70
IH
PP
tAXQX
Max
and E is pulsed to V
0.25V.
70
70
35
30
30
= V
CC
Min
M27C4001
tEHQZ
tGHQZ
)
0
0
0
VALID
-80/-90
PP
Max
80
80
40
30
30
.
PP
input is at 12.75V,
Min
-10/-12/-15
IL
0
0
0
CC
. The data to be
AI00724B
is specified to
Hi-Z
Max
100
100
50
30
30
Unit
ns
ns
ns
ns
ns
ns