
23
Exar Coporation 48720 Kato Road, Fremont CA, 94538 (50) 668-7000 Fax (50) 668-707 www.exar.com
SP505_00_08308
SP505 Receiver Mode Selection
SP505 Driver Mode Selection
Pin Label
RD(a)
RD(b)
RT(a)
RT(b)
CS(a)
CS(b)
DM(a)
DM(b)
RR(a)
RR(b)
IC(a)
IC(b)
SCT(a)
SCT(b)
Pin Label
Mode:
RS232
V.35
RS422
RS449
EIA530
EIA-530A
V.36
0000
0010
1110
0100
0101
1100
1101
1111
0110
SD(a)
tri-state
V.28
V.35–
V.11–
SD(b)
V.35+
V.11+
TR(a)
tri-state
V.28
V.11–
V.10
TR(b)
tri-state
V.11+
tri-state
RS(a)
tri-state
V.28
V.11–
RS(b)
tri-state
V.11+
RL(a)
tri-state
V.28
V.11–
V.10
RL(b)
tri-state
V.11+
tri-state
LL(a)
tri-state
V.28
V.11–
V.10
LL(b)
tri-state
V.11+
tri-state
ST(a)
tri-state
V.28
V.35–
V.11–
ST(b)
V.35+
V.11+
TT(a)
tri-state
V.28
V.35–
V.11–
TT(b)
V.35+
V.11+
tri-state
V.28
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
tri-state
V.11–
V.11+
V.11–
V.11+
V.10
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
V.10
tri-state
V.10
tri-state
V.11–
V.11+
V.10
tri-state
V.10
tri-state
V.10
tri-state
V.11–
V.11+
V.11–
V.11+
Mode:
RS232
V.35
RS422 w/Term
RS422
RS449
EIA530
EIA-530A
V.36
0000
0010
1110
0100
0101
1100
1101
1111
0110
V.28
V.35–
V.11–
V.35+
V.11+
V.28
V.11–
V.11+
V.28
V.11–
V.11+
V.28
V.11–
V.11+
V.28
V.11–
V.11+
V.28
V.11–
V.11+
V.28
V.35–
V.11–
V.35+
V.11+
V.28
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
V.10
>10k to GND
>10k to GND >10k to GND
>10k to GND
V.11–
V.11+
V.11–
V.11+
>10k to GND
V.10
>10k to GND
V.10
>10k to GND
V.10
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
>10k to GND
V.10
V.35–
V.35+
V.28
>10k to GND
V.11–
V.11+
3
0
DEC – DEC
3
0
DEC – DEC
12
0
12
0
12
0
RS422 w/Term
12
0
12
0
12
0
V.11–
V.11+
V.11–
V.11+
12
0
12
0
12
0
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
12
0
12
0
12
0
V.11–
V.11+
V.11–
V.11+
V.11–
V.11+
12
0
12
0
12
0
Table . SP505 Driver Decoder Table
Table 2. SP505 Receiver Decoder Table
The SP505 was externally tested by TUV
Telecom Services, Division of TUV Rhein-
land, and passed both NET/2 and TBR2
requirements. Test reports (NET2/0520/98 for
NET/2 and CTR2/050/98 for TBR2)
can be furnished
upon request.
Please note that although the SP505 ad-
heres to NET/2 testing; any complex or
unusual configuration should be double-
checkedtoensureNETcompliance. Consult
factory for details.