![](http://datasheet.mmic.net.cn/Exar-Corporation/SP508EF-L_datasheet_99754/SP508EF-L_8.png)
8
ExarCorporation48720KatoRoad,FremontCA,9453850-668-707www.exar.comSP508_00_02709
PINDESCRIPTION
PinNumber PinName Description
PinNumber PinName Description
VCC
5VPowerSupplyInput
5
TxC(b)
TxCNon-InvertingInput
2
GND
SignalGround
52
GND
SignalGround
3
SDEN
TxDDriverEnableInput
53
TxC(a)
TxCInvertingInput
4
TTEN
TxCEDriverEnableInput
54
CS(b)
CTSNon-InvertingInput
5
STEN
STDriverEnableInput
55
CS(a)
CTSInvertingInput
6
RSEN
RTSDriverEnableInput
56
DM(b)
DSRNon-InvertingInput
7
TREN
DTRDriverEnableInput
57
DM(a)
DSRInvertingInput
8
RRCEN
DCDDriverEnableInput
58
GNDV0 V.0RxReferenceNode
9
RLEN
RLDriverEnableInput
59
RRT(b)
DCD
DTENon-InvertingInput
0
LLEN#
LLDriverEnableInput
60
RRT(a)
DCD
DTEInvertingInput
RDEN#
RxDReceiverEnableInput
6
IC
RIReceiverInput
2
RTEN#
RxCReceiverEnableInput
62
TM(a)
TMReceiverInput
3
TxCEN#
TxCReceiverEnableInput
63
LL(a)
LLDriverOutput
4
CSEN#
CTSReceiverEnableInput
64
VCC
PowerSupplyInput
5
DMEN#
DSRReceiverEnableInput
65
RL(a)
RLDriverOutput
6
RRTEN# DCD
DTEReceiverEnableInput
66
VSS
-2xVCCChargePumpOutput
7
ICEN#
RIReceiverEnableInput
67
C2N
ChargePumpCapacitor
8
TMEN
TMReceiverEnableInput
68
GND
SignalGround
9
D0
ModeSelectInput
69
CN
ChargePumpCapacitor
20
D
ModeSelectInput
70
C2P
ChargePumpCapacitor
2
D2
ModeSelectInput
7
VCC
PowerSupplyInput
22
TERM_OFF TerminationDisableInput
72
CP
ChargePumpCapacitor
23
D_LATCH# DecoderLatchInput
73
VDD
2xVCCChargePumpOutput
24
NC
NoConnect
74
GND
SignalGround
25
GND
SignalGround
75
TR(a)
DTRInvertingOutput
26
VCC
5VPowerSupplyInput
76
NC
NoConnect
27
LOOPBACK# LoopbackModeEnableInput
77
VCC
PowerSupplyInput
28
TxD
TxDDriverTTLInput
78
TR(b)
DTRNon-InvertingOutput
29
TxCE
TxCEDriverTTLInput
79
RRC(b)
DCDNon-InvertingOutput
30
ST
STDriverTTLInput
80
VCC
PowerSupplyInput
3
RTS
RTSDriverTTLInput
8
RRC(a)
DCDInvertingOutput
32
DTR
DTRDriverTTLInput
82
GND
SignalGround
33
DCD_DCE DCD
DCEDriverTTLInput
83
RS(a)
RTSInvertingOutput
34
RL
RLDriverTTLInput
84
VCC
PowerSupplyInput
35
LL
LLDriverTTLInput
85
RS(b)
RTSNon-InvertingOutput
36
RxD
RxDReceiverTTLOutput
86
GND
SignalGround
37
RxC
RxCReceiverTTLOutput
87
ST(a)
STInvertingOutput
38
TxC
TxCReceiverTTLOutput
88
VCC
PowerSupplyInput
39
CTS
CTSReceiverTTLOutput
89
V35TGND3 STTerminationReferance
40
DSR
DSRReceiverTTLOutput
90
ST(b)
STNon-InvertingOutput
4
DCD_DTE DCD
DTEReceiverTTLOutput
9
GND
SignalGround
42
RI
RIReceiverTTLOutput
92
TT(a)
TxCEInvertingOutput
43
TM
TMReceiverTTLOutput
93
VCC
5VPowerSupplyInput
44
GND
SignalGround
94
V35TGND2 STTerminationReferance
45
VCC
PowerSupplyInput
95
TT(b)
TxCENon-InvertingOutput
46V35RGNDRecieverTerminationRefrence
96
GND
SignalGround
47
RD(b)
RXDNon-InvertingInput
97
SD(a)
TxDInvertingOutput
48
RD(a)
RXDInvertingInput
98
VCC
5VPowerSupplyInput
49
RT(b)
RxCNon-InvertingInput
99
V35TGND STTerminationReferance
50
RT(a)
RxCInvertingInput
00
SD(b)
TxDNon-InvertingOutput