SP504 Datasheet, PDF (19/31 Pages) Sipex Corporation – WAN Multi-Mode Serial Transceiver

+5V
10µF
1N5819
22µF
22µF
22µF
25
27 26 30 28 31
VCC VDD C1+ C1- C2+ C2-
Charge Pump
VSS ₃₂
A
B
22µF
RD(a) 70
14 TxD
RxD 1
RD(b) 71
RT(a) 37
61 SD(a)
59 SD(b)
13 DTR
RxC 20
RT(b) 38
CS(a) 66
58 TR(a)
56 TR(b)
16 RTS
CTS 80
CS(b) 67
DM(a) 68
DSR 78
54 RS(a)
52 RS(b)
17 RL
47 RL(a)
45 RL(b)
DM (b) 69
RR(a) 35
A — Receiver Tri-State circuitry & V.35
termination resistor circuitry for
RxD, RxC & SCT.
B — Driver Tri-State circuitry & V.35
termination circuitry for TxD,
TxC & ST.
DCD 19
RR(b) 36
IC(a) 39
RI 21
24 LL
51 LL(a)
49 LL(b)
22 ST
42 ST(a)
44 ST(b)
IC(b) 40
23 STEN
SCT(a) 76
15 TxC
SCT 79
63 TT(a)
RS-422 Mode
Input Word
0
1
0
0
0
1
0
0
SCTEN 7
SCT(b) 77
5
4
3
External
2
Latch
9
10
11
12
65 TT(b)
6 TTEN
SP504
(SEE PAGE 12 FOR GROUND PINS)
① ☛ For V.35 Termination, needs to be connected
for proper V.35 operation. A low on-
resistance (≤1Ω) FET or switch can be used
to connect and disconnect the resistor from
the non-inverting output.
Figure 18. Typical Operation Circuit
150Ω
①
150Ω
①
150Ω
①
Rev: A Date:1/27/04
SP504 Multi–Mode Serial Transceivers
19
© Copyright 2004 Sipex Corporation