M27C405-100B6TR STMICROELECTRONICS [STMicroelectronics], M27C405-100B6TR Datasheet - Page 2

• Manufacturer Part Number: M27C405-100B6TR
• Description: 4 Mbit 512Kb x 8 OTP EPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M27C405
Figure 2A. DIP Pin Connections
Figure 2C. TSOP Pin Connections
2/15
V CC
V PP
A11
A13
A14
A17
A18
A16
A15
A12
A9
A8
A7
A6
A5
A4
V SS
A18
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
M27C405
M27C405
(Normal)
AI01602
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
AI01604
32
25
24
17
V CC
V PP
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 modes of operationsof theM27C405 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 M27C405 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, inde-
pendent of device selection. Assuming that the
addresses are stable, the address access time
(t
Data is availableat the output after a delay of t
from the falling edge of G, assuming that E has
been low and the addresses have been stable for
at least t
Standby Mode
The M27C405 has a standby mode which reduces
the active current from 30mA to 100 A. The
M27C405 is placed in the standby mode by apply-
ing a CMOS high signal to the E input. When in the
standbymode, the outputs are in a high impedance
state, independent of the G input.
AVQV
) is equalto the delay from E to output (t
Q0
A7
A6
A5
A4
A3
A2
A1
A0
AVQV
-t
9
GLQV
pp
.
M27C405
and 12V on A9 for Electronic
17
1
32
25
AI01603
A14
A13
A8
A9
A11
G
A10
E
Q7
ELQV
GLQV
).