M27C4001-80XC6X STMicroelectronics, M27C4001-80XC6X Datasheet - Page 2

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

M27C4001
Figure 2A. DIP Pin Connections
Figure 2C. TSOP Pin Connections
2/16
V CC
V PP
A11
A13
A14
A17
A18
A16
A15
A12
A9
A8
A7
A6
A5
A4
V PP
V SS
A16
A15
A12
Q0
Q1
Q2
A7
A6
A5
A4
A3
A2
A1
A0
1
8
9
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
M27C4001
M27C4001
(Normal)
AI00722
AI01155B
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
32
25
24
17
V CC
A18
A17
A14
A13
A8
A9
A11
G
A10
E
Q7
Q6
Q5
Q4
Q3
G
A10
E
Q7
Q6
Q5
Q4
Q3
V SS
Q2
Q1
Q0
A0
A1
A2
A3
Figure 2B. LCC Pin Connections
DEVICE OPERATION
The operating modes of the M27C4001 are listed
in the Operating Modes table. A single power sup-
ply is required in the read mode. All inputs are TTL
levels except for V
Signature.
Read Mode
The M27C4001 has two control functions, both of
which must be logically active in order to obtain
data at the outputs. Chip Enable (E) is the power
control and should be used for device selection.
Output Enable (G) is the output control and should
be used to gate data to the output pins, indepen-
dent of device selection. Assuming that the ad-
dresses are stable, the address access time
(t
(t
of t
E has been low and the addresses have been sta-
ble for at least t
Standby Mode
The M27C4001 has a standby mode which reduc-
es the supply current from 30mA to 100 A. The
M27C4001 is placed in the standby mode by ap-
plying a CMOS high signal to the E input. When in
the standby mode, the outputs are in a high imped-
ance state, independent of the G input.
AVQV
ELQV
GLQV
). Data is available at the output after a delay
) is equal to the delay from E to output
Q0
A7
A6
A5
A4
A3
A2
A1
A0
from the falling edge of G, assuming that
9
AVQV
PP
M27C4001
-t
and 12V on A9 for Electronic
GLQV
17
1
32
.
25
AI00723
A14
A13
A8
A9
A11
G
A10
E
Q7