sp3508 Exar Corporation, sp3508 Datasheet - Page 31

• Manufacturer Part Number: sp3508
• Description: Rugged 3.3v, 20mbps, 8 Channel Multiprotocol Tranciever With Programmable Dce/dte And Terminination Resistors
• Manufacturer: Exar Corporation

Date: 10/29/04
Figure 51. SP3508 Typical Operating Configuration to Serial Port Connector with DCE/DTE programmability
DCE/DTE
+3.3V
+3.3V
10µF
+3.3V
29
31
32
34
35
36
37
38
39
40
41
42
43
44
45
46
33
17
10
11
12
13
14
15
16
2
3
4
5
6
7
8
9
AV
V
TMEN
SDEN
TTEN
STEN
RSEN
TREN
RRCEN
RDEN
RTEN
TxCEN
RLEN
LLEN
CSEN
DMEN
RRTEN
ICEN
DCD_DCE
DCD_DTE
CC
SP3508 Enhanced WAN Multi–Mode Serial Transceiver
CC
C
TxCE
1µF
RTS
DTR
RxD
RxC
CTS
DSR
VDD
TxC
TxD
TM
ST
RL
LL
RI
V
DD
76
SP3508CF
Charge Pump Section
Transceiver Section
C1+
Logic Section
74
1µF
C1
GND
C1-
70
C2+
TERM_OFF
LOOPBACK
72
D_LATCH
1µF
C2
RRC(a)
RRC(b)
C2-
RRT(a)
RRT(b)
AGND
TxC(a)
TxC(b)
DM(a)
DM(b)
SD(a)
SD(b)
RS(a)
RS(b)
TR(a)
TR(b)
RD(a)
RD(b)
CS(a)
CS(b)
TM(a)
TT(a)
TT(b)
ST(a)
ST(b)
RL(a)
RT(a)
RT(b)
LL(a)
69
V
V
C3+
D0
D1
D2
C3-
SS1
SS2
IC
27
26
68
97
99
93
95
89
91
81
83
85
87
79
77
67
65
50
49
52
51
55
53
57
56
59
58
62
61
63
64
18
19
20
28
24
21
22
30
31
1µF
C
C
VSS1
VSS2
C3
+3.3V
* - Driver applies for DCE only on pins 15 and 12.
Receiver applies for DTE only on pins 15 and 12.
Driver applies for DCE only on pins 8 and 10.
Receiver applies for DTE only on pins 8 and 10.
µDB-26 Serial Port Connector Pins
2 (V.11, V.35, V.28)
14 (V.11, V.35)
24 (V.11, V.35, V.28)
11 (V.11, V.35)
4 (V.11, V.28)
19 (V.11)
20 (V.11, V.28)
23 (V.11)
21 (V.10, V.28)
18 (V.10, V.28)
3 (V.11, V.35, V.28)
16 (V.11, V.35)
17 (V.11, V.35, V.28)
9 (V.11, V.35)
15 (V.11, V.35, V.28)
12 (V.11, V.35)
5 (V.11, V.28)
13 (V.11)
6 (V.11, V.28)
22 (V.11)
8 (V.11, V.28)
10 (V.11)
22 (V.10, V.28)
25 (V.10, V.28)
Output Line
Input Line
I/O Lines represented by double arrowhead signifies a bi-directional bus.
© Copyright 2004 Sipex Corporation
Signal (DTE_DCE)
TXD_RXD_A
TXD_RXD_B
TXCE_TXC_A
TXCE_TXC_B
RTS_CTS_A
RTS_CTS_B
DTR_DSR_A
DTR_DSR_B
RL_RI
LL_TM
RXD_TXD_A
RXD_TXD_B
RXC_TXCE_A
RXC_TXCE_B
*TXC_RXC_A
*TXC_RXC_B
CTS_RTS_A
CTS_RTS_B
DSR_DTR_A
DSR_DTR_B
DCD_DCD_A
DCD_DCD_B
RI_RL
LL_TM