SP504 Sipex, SP504 Datasheet - Page 19

• Manufacturer Part Number: SP504
• Description: WAN Multi-Mode Serial Transceiver
• Manufacturer: Sipex

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