M27C512 STMicroelectronics, M27C512 Datasheet - Page 2

• Manufacturer Part Number: M27C512
• Description: 512 Kbit 64Kb x8 UV EPROM and OTP EPROM
• Manufacturer: STMicroelectronics

M27C512
Figure 2A. DIP Pin Connections
Figure 2C. TSOP Pin Connections
2/15
GV PP
V CC
A11
A13
A14
A15
A12
A9
A8
A7
A6
A5
A4
A3
V SS
A15
A12
Q0
Q1
Q2
A7
A6
A5
A4
A3
A2
A1
A0
22
28
1
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
M27C512
M27C512
AI00762
AI00764B
28
27
26
25
24
23
22
21
20
19
18
17
16
15
21
15
14
8
V CC
A14
A13
A8
A9
A11
GV PP
A10
E
Q7
Q6
Q5
Q4
Q3
A10
E
Q7
Q6
Q5
Q4
Q3
V SS
Q2
Q1
Q0
A0
A1
A2
Figure 2B. LCC Pin Connections
DEVICE OPERATION
The modes of operations of the M27C512 are listed
in the Operating Modes table. A single power
supply is required in the read mode. All inputs are
TTL levels except for GV
Electronic Signature.
Read Mode
The M27C512 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 available at 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 M27C512 has a standby mode which reduces
the active current from 30mA to 100 A The
M27C512 is placed in the standby mode by apply-
ing a CMOS high signal to the E input. When in the
standby mode, the outputs are in a high impedance
state, independent of the GV
Warning: NC = Not Connected, DU = Don’t Use
AVQV
) is equal to the delay from E to output (t
NC
Q0
AVQV
A6
A5
A4
A3
A2
A1
A0
-t
9
GLQV
.
M27C512
17
1
PP
32
PP
and 12V on A9 for
input.
25
AI00763
A8
A9
A11
NC
GV PP
A10
E
Q7
Q6
ELQV
GLQV
).