SP505
WAN Multi-Mode Serial Transceiver
• +5V Only Operation
• Seven (7) Drivers and Seven (7) Receivers
• Driver and Receiver Tri-state Control
• Internal Transceiver Termination Resistors for
V. and V.35 Protocols
• Loopback Self-Test Mode
• Software Selectable Protocol Selection
• Interface Modes Supported:
• RS-232
(V.28)
• X.2/RS-422
(V.)
• EIA-530
(V.0 & V.)
• EIA-530A
(V.0 & V.)
• RS-449
(V.0 & V.)
• V.35
(V.35 & V.28)
• V.36
(V.0 & V.)
• RS-485
(un-terminated V.)
• Improved ESD Tolerance for Analog I/Os
• High Differential Transmission Rates
•
SP505A - 0Mbps
•
SP505B - over 6Mbps
• Compliant to NET/2 and TBR2 Physical Layer
Requirements
(TUV Test Report NET2/0520/98)
(TUV Test Report CTR2/0520/98)
77 SCT(b)
76 SCT(a)
69 DM(b)
68 DM(a)
71 RD(b)
70 RD(a)
67 CS(b)
66 CS(a)
61 SD(a)
75 GND
72 GND
64 GND
65 TT(b)
63 TT(a)
78 DSR
79 SCT
80 CTS
74 V
CC
73 V
CC
62 V
CC
RxD 1
SDEN 2
TREN 3
RSEN 4
LLEN 5
TTEN 6
SCTEN7
LATCH 8
DEC
3
9
DEC
2
10
DEC
1
11
DEC
0
12
DTR 13
TxD 14
TxC 15
RTS 16
RL 17
RLEN 18
DCD 19
RxC 20
60 GND
59 SD(b)
58 TR(a)
57 GND
56 TR(b)
55 V
CC
54 RS(a)
53 GND
52 RS(b)
51 LL(a)
50 GND
49 LL(b)
48 V
CC
47 RL(a)
46 GND
45 RL(b)
44 ST(b)
43 GND
42 ST(a)
41 V
CC
SP505
STEN 23
ST 22
RI 21
LL 24
IC(a) 39
RR(a) 35
RR(b) 36
R
T(a) 37
The SP505 is a monolithic device that supports eight (8) popular serial interface standards for DTE
to DCE connectivity. The SP505 is fabricated using a low power BiCMOS process technology, and
incorporates a Sipex patented (5,306,954) charge pump allowing +5V only operation. Seven (7)
drivers and seven (7) receivers can be configured via software for any of the above interface modes
at any time. The SP505 requires no additional external components for compliant operation for all
of the eight (8) modes of operation. All necessary termination is integrated within the SP505 and is
switchable when V.35 drivers, V.35 receivers, and V. receivers are used. The SP505 can operate
as either a DTE or DCE.
Additional features with the SP505 include internal loopback that can be initiated in either single-ended
or differential modes. While in loopback mode, driver outputs are internally connected to receiver
inputs creating an internal signal path convenient for diagnostic testing. This eliminates the need for
an external loopback plug. The SP505 also includes a latch enable pin with the driver and receiver
address decoder. Tri-state ability for the driver and receiver outputs is controlled by supplying a 4-bit
word into the address decoder. Seven (7) drivers and one () receiver in the SP505 include separate
enable pins for added convenience. The SP505 is ideal for WAN serial ports in networking equipment
such as routers, switches, DSU/CSU's, and other access devices.
DESCRIPTION
V.35
EIA-530
WAN
Exar Coporation 48720 Kato Road, Fremont CA, 94538 • (50) 668-7000 • Fax (50) 668-707 • www.exar.com
R
T(b) 38
SP505_00_08308
IC(b) 40
GND 29
C
1
– 30
C – 31
GND 34
V
CC
25
C
1
+ 26
V
DD
27
C
2
+ 28
V
CC
33
V
SS
32
2
EXAR [ EXAR CORPORATION ]
