SP505 Datasheet, PDF (24/35 Pages) Sipex Corporation – WAN Multi-Mode Serial Transceiver

(SEE PINOUT FOR V_CC PINS)
+5V
10µF
1N5819
22µF
22µF
22µF
25
27 26 30 28 31
VCC VDD C1+ C1- C2+ C2-
Charge Pump
32 ^22µF
VSS
A
RD(a) 70
RxD 1
RD(b) 71
RT(a) 37
RxC 20
RT(b) 38
CS(a) 66
CTS 80
CS(b) 67
DM(a) 68
DSR 78
DM (b) 69
RR(a) 35
B
14 TxD
61 SD(a)
59 SD(b)
2 SDEN
13 DTR
58 TR(a)
56 TR(b)
3 TREN
16 RTS
54 RS(a)
52 RS(b)
4 RSEN
17 RL
47 RL(a)
45 RL(b)
18 RLEN
RS-422 Mode
Input Word
0
DCD 19
RR(b) 36
IC(a) 39
RI 21
IC(b) 40
SCT(a) 76
SCT 79
SCTEN 7
SCT(b) 77
9
24 LL
51 LL(a)
49 LL(b)
5 LLEN
22 ST
42 ST(a)
44 ST(b)
23 STEN
15 TxC
63 TT(a)
65 TT(b)
6 TTEN
1
10
0
11
0
12
A — Receiver Tr-State circuitry
V.11 & V.35 termination
8
SP505
resistor circuitry (RxD,
RxC & SC.T)
LATCH
B — Driver Tri-State circuitry &
V.35 Termination circuitry
(TxD, TxC & S. T)
(SEE PINOUT ASSIGNMENTS FOR GROUND PINS)
Figure 52. SP505 Typical Operating Circuit
Exar Coporation 48720 Kato Road, Fremont CA, 94538 • [phone] • Fax [phone] • www.exar.com
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SP505_100_081308