75
S-301
SN74LV244APW (IC708, 719: 1U-3694)
BU2090F (IC303: 1U-3681)
SN74HCT244APW (IC205: 1U-3694)
(IC504: 1U-3695)
SN74LV157APW (IC303: 1U-3692)
(IC704, 715, 720, 721: 1U-3694)
SN74LVC139APWR (IC902: 1U-3694))
LMS202 (IC101: 1U-3694)
1
2
3
4
5
6
7
8
20
19
18
16
15
14
13
I3
VCC
OE2
O2
I5
O0
I4
O1
I6
OE
I0
O4
I1
O5
I2
O6
9
12
O7
O3
10
11
GND
I7
17
1
2
3
4
5
6
7
8
18
17
16
15
14
13
12
11
Q3
VDD
OE
Q7
Q8
Q11
Q10
Q9
Q6
VSS
DATA
CLOCK
LCK
Q0
Q1
Q2
9
10
Q4
Q5
CONTROL CIRCUIT
12-bit SHIFT REGISTER
12-bit STRAGEREGISTER
OUTPUTBUFFER(OPENDRAIN)
1A
1B
1Y
2A
2B
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vcc
ST
4A
4B
4Y
3A
3B
3Y
SELECT
5
SEL
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1G
1A
1B
1Y 0
1Y 1
1Y 2
1Y 3
G ND
V
C C
2G
2A
2B
2Y 0
2Y 1
2Y 2
2Y 3
F UNC T ION TAB LE
(each decoder/demultiplexer)
INP UT S
OUT P UT S
G
S E LE C T
OUT P UT S
G
B
A
Y 3
Y 2
Y 1
Y 0
L
L
L
H
H
H
L
L
L
H
H
H
L
H
L
H
L
H
L
H
H
L
H
H
L
H
H
H
H
X
X
H
H
H
H
Pin Function
External capacitor connection pins.
Positive supply for TIA/EIA-232E drivers.
External capacitor connection pins.
Negative supply for TIA/EIA-232E drivers.
Transmitter output pins conform to TIA/EIA-232E levels. The typical transmitter output swing is
±
8V when loaded 3k
load to ground. The open-circuit output voltage swings from (V+
0.6V)
to V
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