SP3508 Datasheet, PDF (21/33 Pages) Sipex Corporation – Rugged 3.3V, 20Mbps, 8 Channel Multiprotocol Transceiver with Programmable DCE/DTE and Termination Resistors

(See pinout assignments for
GND and V_CC pins)
CVDD
+3.3V (decoupling capacitor not shown)
C1
C2
1µF
1µF
1µF
+3.3V
VCC
76 _VDD
74
C1+
70
C1-
72
C2+
Regulated Charge Pump
69
24
C2- C3+
C3- 26
VSS1 ⁶⁸
29 AVCC
Inverter
VSS2 ²⁷
RD(a)
RD(b)
RT(a)
RxD
RDEN
RT(b)
TxC(a)
RxC
RTEN
TxC(b)
CS(a)
TxC
TxCEN
CS(b)
DM(a)
CTS
CSEN
DM(b)
RRT(a)
DSR
DMEN
DCD_DTE
RRTEN
RRT(b)
IC
RI
ICEN
TM(a)
TM
TMEN
RECEIVER TERMINATION NETWORK
V.35 MODE
V.11 MODE
RX ENABLE
51ohms
124ohms
51ohms
50
39
10
49
52
40
11
51
55
41
12
53
57
42
13
56
59
43
14
58
62
44
15
61
63
45
16
64
46
17
18
D0
19
D1
20 _D2
21
D-LATCH
22 _TERM-OFF
30 _LOOPBACK
SP3508
GND
31
97
99
2
32
93
95
3
33
89
91
4
34
81
83
5
35
85
87
6
36
79
77
7
37
67
8
38
65
9
60
V.10-GND
AGND ²⁸
1µF C3
1µF C_VSS1
C_VSS2
1µF
TxD
SD(a)
SD(b)
SDEN
TxCE
TT(a)
TT(b)
TTEN
ST
ST(a)
ST(b)
STEN
RTS
RS(a)
RS(b)
RSEN
DTR
TR(a)
TR(b)
TREN
DCD_DCE
RRC(a)
RRC(b)
RRCEN
RL
RL(a)
RLEN
LL
LL(a)
LLEN
V.35 DRIVER TERMINATION NETWORK
V.35 MODE
TX ENABLE
51ohms
124ohms
51ohms
Figure 44. Functional Diagram
Date: 06/14/04
SP3508 Enhanced WAN Multi–Mode Serial Transceiver
21
© Copyright 2004 Sipex Corporation