BC81
SCD33U16V3ZY
BC50
SCD33U16V3ZY
C1+
28 C1-
24 C2+
1 C2-
2 T1IN
14 T2IN
13 T3IN
12 R2OUTB
20 R1OUT
19 R2OUT
18 R3OUT
17 R4OUT
16 R5OUT
15 FORCEON
23 FORCEOFF#
22 INVALID#
21
V+ 27
V- 3
T1OUT 9
T2OUT 10
T3OUT 11
R1IN 4
R2IN 5
R3IN 6
R4IN 7
R5IN 8
GND 25
VCC 26
U16
MAX3243
BC256
SCD1U
BC49
SCD33U16V3ZY
BC82
SCD047U25V3KX
1234
5678
RN29
SRN10K
1
2
R54
10KR3
1
2
R53
100KR3
BC32
SC680P
1
2
3
4
5
6
7
8
9
11
10 CN4
RS232-9-4-D
BC25
SC680P BC24
SC680P BC29
SC680P BC31
SC680P
BC26
SC680P BC28
SC680P BC27
SC680P
Date: March 1, 1998 Sheet 21 of 28
Size Document Number REV
A97160-1, SERIAL V15
Title Serial port
365
Acer Inc.
PSOUT1#
PRTS1#
PDTR1#
RS232_27
RS232_3
+5V
COM1_RI
SOUT1#
RTS1#
DTR1#
RS232_28
RS232_24
RS232_1
RS232_2
20
20
20
DSR1#
RI1#
SIN1
DCD1#
CTS1#
+5V
19
20,22
20
20
20
20
PDSR1#
PRI1#
PCTS1#
PSIN1
PDCD1#
F
O
R
C
E
O
N
(Top View)+5V
Serial portPDSR1#
PRI1#
PCTS1#
PSIN1
PDCD1#
PSOUT1#
PRTS1#
PDTR1#
Wide GND line