M27V512 데이터 시트보기 (PDF) - STMicroelectronics
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M27V512 Datasheet PDF : 16 Pages
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M27V512
Figure 2A. DIP Pin Connections
Figure 2B. LCC Pin Connections
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
Q0
Q1
Q2
VSS
1
28
2
27
3
26
4
25
5
24
6
23
7
22
M27V512
8
21
9
20
10
19
11
18
12
17
13
16
14
15
VCC
A14
A13
A8
A9
A11
GVPP
A10
E
Q7
Q6
Q5
Q4
Q3
AI01907
Figure 2C. TSOP Pin Connections
GVPP
A11
A9
A8
A13
A14
VCC
A15
A12
A7
A6
A5
A4
A3
22
21
28
15
M27V512
1
14
7
8
A10
E
Q7
Q6
Q5
Q4
Q3
VSS
Q2
Q1
Q0
A0
A1
A2
AI00734B
2/16
A6
A5
A4
A3
A2 9
A1
A0
NC
Q0
1 32
M27V512
17
A8
A9
A11
NC
25 GVPP
A10
E
Q7
Q6
AI00733B
Warning: NC = Not Connected, DU = Don’t Use
DEVICE OPERATION
The operating modes of the M27V512 are listed in
the Operating Modes table. A single power supply
is required in the read mode. All inputs are TTL
levels except for GVPP and 12V on A9 for Elec-
tronic Signature.
Read Mode
The M27V512 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
(tAVQV) is equal to the delay from E to output
(tELQV). Data is available at the output after a delay
of tGLQV from the falling edge of G, assuming that
E has been low and the addresses have been sta-
ble for at least tAVQV-tGLQV.
Standby Mode
The M27V512 has a standby mode which reduces
the supply current from 10mA to 10µA with low
voltage operation VCC ≤ 3.6V, see Read Mode DC
Characteristics table for details.The M27V512 is
placed in the standby mode by applying a CMOS
high signal to the E input. When in the standby
mode, the outputs are in a high impedance state,
independent of the GVPP input.
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