SP505AN Datasheet, PDF (2/30 Pages) Sipex Corporation – Multi-Protocol Serial Transceivers

DTE Configuration to a DB-25 Serial Port
The SP505, SP506 and SP507 can easily be configured
as a DTE in all serial communication applications.
The SP505, SP506 and SP507 contain seven drivers
and seven receivers to support most of the signals
required for proper serial communications. Figure 1
summarizes the usual signals used in synchronous
serial communications. The basic configuration shown
in Figure 2 illustrates a connection to a DB-25 D-sub
connector commonly used for EIA-530 and RS-232.
For other serial interface protocols, the decoder
can be used to select the physical layer interface.
The DEC_0-3 of the SP505 and SP506 will program its
internal drivers and receivers to electrically adhere to
the appropriate interface. The SP507 decoder is
slightly different and uses 3-bits to select the desired
interface. For the appropriate physical connection,
a "daughter" cable can be attached to the DB-25
connector (female pins on cable) and transfer the
signals to the physically compliant connector.
For example, a V.35 interface will have a ISO-2593
34-pin connector. For a V.35 DTE interface, the
SP505, SP506 and SP507 can be programed to V.35
mode and a daughter cable, having a DB-25 female
connector on one end and a V.35 34-pin male
connector on the other end, will allow the equipment
to have an electrically and physically complaint V.35
interface.
Signal Name
Shield
Transmitted
Data
Received
Data
Request To Send
Clear To Send
DCE Ready (DSR)
DTE Ready (DTR)
Signal Ground
Recv. Line
Sig. Det. (DCD)
Trans. Sig. Elemt.
Timing
Recv. Sig. Elemt.
Timing
Local Loopback
Remote Loopback
Ring Indicator
Trans. Sig. Elemt.
Timing
Test Mode
EIA-232 EIA-530 EIA-449
V.35
Source Mnemonic Pin Mnemonic Pin Mnemonic Pin Mnemonic Pin
—
—
1
—
1
—
1
—
A
DTE
BA
2
BA (A)
2
SD (A)
4
103
P
BA (B)
14
SD (B)
22
103
S
DCE
BB
3
BB (A)
3
RD (A)
6
104
R
BB (B)
16
RD (B)
24
104
T
DTE
CA
4
CA (A)
4
RS (A)
7
105
C
CA (B)
19
RS (B)
25
DCE
CB
5
CB (A)
5
CS (A)
9
106
D
CB (B)
13
CS (B)
27
CC (A)
6
DM (A)
11
DCE
CC
6
107
E
CC (B)
22
DM (B)
29
DTE
CD (A)
20
TR (A)
12
CD
20
108
H*
CD (B)
23
TR (B)
30
—
AB
7
AB
7
SG
19
102
B
DCE
CF
8
CF (A)
8
RR (A)
13
109
F
CF (B)
10
RR (B)
31
DCE
DB
15
DB (A)
15
ST (A)
5
114
Y
DB (B)
12
ST (B)
23
114
AA
DD (A)
17
RT (A)
8
115
V
DCE
DD
17
DD (B)
9
RT (B)
26
115
X
DTE
LL
18
LL
18
LL
10
141
L*
DTE
RL
21
RL
21
RL
14
140
N*
DCE
CE
22
—
—
—
—
125
J*
DTE
DA
24
DA (A)
24
TT (A)
17
113
U*
DA (B)
11
TT (B)
35
113
W*
DCE
TM
25
TM
25
TM
18
142
NN *
X.21
Mnemonic Pin
—
1
Circuit T(A) 2
Circuit T(B) 9
Circuit R(A) 4
Circuit R(B) 11
Circuit C(A) 3
Circuit C(B) 10
Circuit I(A) 5
Circuit I(B) 12
Circuit G
8
Circuit B(A)** 7
Circuit B(B)** 14
Circuit S(A)
6
Circuit S(B) 13
Circuit X(A)** 7
Circuit X(B)** 14
* - Optional signals
** - Only one of the two X.21 signals, Circuit B or X, can
be implemented and active at one time.
1
8
9
15
X.21 Connector (ISO 4903)
DTE Connector — DB-15 Pin Male
DCE Connector — DB-15 Pin Female
1
5
10
15
19
20
25
30
33
37
RS-449 Connector (ISO 4902)
DTE Connector Face — DB-37 Pin Male
DCE Connector Face – DB-37 Pin Female
Figure 1. Signals and Connector Allocation Table
1
7
13
14
20
25
RS-232 & EIA-530 Connector (ISO 2110)
DTE Connector — DB-25 Pin Male
DCE Connector — DB-25 Pin Female
NN JJ DD Z V R L F B
LL FF BB X T N J D
MM HH CC Y U P K E A
KK EE AA W S M H C
V.35/ISO 2593 Connector
DTE Connector Face — 34 Pin Male
DCE Connector Face — 34 Pin Female
SP505/6/7APN/03
SP505, SP506, SP507 Application Note
2
© Copyright 2000 Sipex Corporation