28
AVR-2805/985/AVC-2890
CY7C1049CV33-10ZC (AD: IC908, 910)
LMS202IMX (CV: IC705)
14
15
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
R
O
W
DE
CO
DE
R
SEN
S
E
AM
PS
INPUT BUFFER
DOWN
WE
OE
I/O
0
I/O
1
I/O
2
I/O
3
512K x 8
ARRAY
I/O
7
I/O
6
I/O
5
I/O
4
A
0
A
11
A
13
A
12
A
CE
A
A
16
A
17
A
9
A
18
A
10
Top View
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
WE
V
CC
V
SS
A
18
A
15
A
12
A
14
I/O
5
I/O
4
A
9
A
0
I/O
0
I/O
1
I/O
2
I/O
3
OE
A
17
A
16
A
13
CE
NC
NC
NC
NC
I/O
7
I/O
6
V
CC
V
SS
A
10
A
11
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
37
40
39
38
41
44
43
42
9
10
11
14
31
32
36
35
34
33
12
13
16
15
29
30
18
19
20
21
22
17
27
26
25
24
23
28
POWER
Pin Function
External capacitor connection pins. Recommended external capacitor C1 = 0.1µF (6.3V)
Positive supply for TIA/EIA-232E drivers. Recommended external capacitor C4 = 0.1µF (6.3V)
External capacitor connection pins. Recommended external capacitor C2 = 0.1µF (16V)
6
V−
Negative supply for TIA/EIA-232E drivers. Recommended external capacitor C3 = 0.1µF (16V)
7, 14
T1out, T2out
Transmitter output pins conform to TIA/EIA-232E levels. The typical transmitter output swing is
±
8V when loaded 3k
Ω
load to ground. The open-circuit output voltage swings from (V+ − 0.6V)
to V−
8,13
R1in, R2in
Receiver inputs accept TIA/EIA-232
9, 12
R1out and R2out Receiver output pins are TTL/CMOS compatible
10, 11
Tin1, Tin2
Transmitter input pins are TTL/CMOS compatible. Inputs of transmitter do not have pull-up
resistors. Connect all unused transmitter inputs to ground
15
GND
Ground pin
16
V
S
Power supply pin for the device, +5V (
±
10%)
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299