SP522 Datasheet, PDF (18/23 Pages) Sipex Corporation – Low-Cost Programmable Multi-Protocol Transceivers

1N5819
+5V
10µF
22µF
various VCC
+ supply pins
V_CC
Drivers
TxD
14
DTR
13
RTS
16
TxC
15
ST
22
RL
17
LL
24
Receivers _RxD
1
RxC
20
CTS
80
DSR
78
DCD
19
RI
21
SCT
79
22µF 22µF
++
+
27 26 30 28 31
V_DD C1+ C1- C2+ C2- ₃₂
SP504CF
V_SS
61
59
58
56
54
52
63
65
42
44
47
45
51
49
70
71
37
38
66
67
68
69
35
36
39
40
76
77
+ _22µF
0
0
1
1
12 ^TDEC0
11 ^TDEC1
10 ^TDEC2
9 ^TDEC3
RDEC0 ₂
RDEC1 ₃
RDEC2 ₄
RDEC3 ₅
see pinout diagram for various ground pins
Tied to TDEC0
Tied to TDEC1
+5V
+5V
+ _10µF
13
+ _10µF
21
7
8
V_CC
V_DD
DP1
V_SS
DP0 ^SP522
22
+
2
LATCH_EN
–5V
10µF
10
11
6
9
15
4
1
20
5
24
18
3
LOOPBCK
GND 14
DB-37 Connector
4
22
12
30
7
25
17
35
14
CIRCUIT
CIRCUIT NAME
MNEMONIC
CIRCUIT
DIRECTION
CIRCUIT
TYPE
10
SG SIGNAL GROUND
--------------
SC SEND COMMON
TO DCE
COMMON
6
RC RECEIVE COMMON
IS
TERMINAL IN SERVICE
FROM DCE
TO DCE
24
8
IC
INCOMING CALL
TR TERMINAL READY
FROM DCE _CONTROL
TO DCE
26
DM DATA MODE
FROM DCE
9
SD SEND DATA
RD RECEIVE DATA
TO DCE
FROM DCE
DATA
27
TT
TERMINAL TIMING
TO DCE
11
ST
SEND TIMING
FROM DCE TIMING
29
RT RECEIVE TIMING
FROM DCE
13
RS REQUEST TO SEND
CS CLEAR TO SEND
TO DCE
FROM DCE
31
RR RECEIVER READY
FROM DCE
15
SQ SIGNAL QUALITY
FROM DCE _CONTROL
NS NEW SIGNAL
TO DCE
5
SF SELECT FREQUENCY
TO DCE
SR SIGNAL RATE SELECTOR TO DCE
23
SI
SIGNAL RATE INDICATOR FROM DCE
SSD SECONDARY SEND DATA
SRD SECONDARY RD
TO DCE
FROM DCE
DATA
SRS SECONDARY RS
TO DCE
SCS SECONDARY CS
FROM DCE CONTROL
SRR SECONDARY RR
FROM DCE
LL
LOCAL LOOPBACK
RL REMOTE LOOPBACK
TO DCE
TO DCE
CONTROL
TM TEST MODE
FROM DCE
SS SELECT STANDBY
SB STANDBY INDICATOR
TO DCE
FROM DCE ^CONTROL
RS-449 Interchange Circuits Table
RS-423 Outputs
RS-423 Inputs
Figure 15. Adding extra channels using the SP522 and SP504
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
18
© Copyright 2003 Sipex Corporation