SP508E Datasheet, PDF (8/29 Pages) Exar Corporation – Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors

Pin Number Pin Name Description
1
VCC 5V Power Supply Input
2
GND Signal Ground
3
SDEN TxD Driver Enable Input
4
TTEN TxCE Driver Enable Input
5
STEN ST Driver Enable Input
6
RSEN RTS Driver Enable Input
7
TREN DTR Driver Enable Input
8
RRCEN DCD Driver Enable Input
9
RLEN RL Driver Enable Input
10
LLEN# LL Driver Enable Input
11
RDEN# RxD Receiver Enable Input
12
RTEN# RxC Receiver Enable Input
13
TxCEN# TxC Receiver Enable Input
14
CSEN# CTS Receiver Enable Input
15
DMEN# DSR Receiver Enable Input
16
RRTEN# DCD_DTE Receiver Enable Input
17
ICEN# RI Receiver Enable Input
18
TMEN TM Receiver Enable Input
19
D0
Mode Select Input
20
D1
Mode Select Input
21
D2
Mode Select Input
22
TERM_OFF Termination Disable Input
23
D_LATCH# Decoder Latch Input
24
NC
No Connect
25
GND Signal Ground
26
VCC 5V Power Supply Input
27
LOOPBACK# Loopback Mode Enable Input
28
TxD
TxD Driver TTL Input
29
TxCE TxCE Driver TTL Input
30
ST
ST Driver TTL Input
31
RTS
RTS Driver TTL Input
32
DTR DTR Driver TTL Input
33
DCD_DCE DCD_DCE Driver TTL Input
34
RL
RL Driver TTL Input
35
LL
LL Driver TTL Input
36
RxD
RxD Receiver TTL Output
37
RxC
RxC Receiver TTLOutput
38
TxC
TxC Receiver TTL Output
39
CTS
CTS Receiver TTL Output
40
DSR DSR Receiver TTL Output
41
DCD_DTE DCD_DTE Receiver TTL Output
42
RI
RI Receiver TTL Output
43
TM
TM Receiver TTL Output
44
GND Signal Ground
45
VCC Power Supply Input
46 V35RGND Reciever Termination Refrence
47
RD(b) RXD Non-Inverting Input
48
RD(a) RXD Inverting Input
49
RT(b) RxC Non-Inverting Input
50
RT(a) RxC Inverting Input
PIN DESCRIPTION
Pin Number
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Pin Name
TxC(b)
GND
TxC(a)
CS(b)
CS(a)
DM(b)
DM(a)
GNDV10
RRT(b)
RRT(a)
IC
TM(a)
LL(a)
VCC
RL(a)
VSS1
C2N
GND
C1N
C2P
VCC
C1P
VDD
GND
TR(a)
NC
VCC
TR(b)
RRC(b)
VCC
RRC(a)
GND
RS(a)
VCC
RS(b)
GND
ST(a)
VCC
V35TGND3
ST(b)
GND
TT(a)
VCC
V35TGND2
TT(b)
GND
SD(a)
VCC
V35TGND1
SD(b)
Description
TxC Non-Inverting Input
Signal Ground
TxC Inverting Input
CTS Non-Inverting Input
CTS Inverting Input
DSR Non-Inverting Input
DSR Inverting Input
V.10 Rx Reference Node
DCD_DTE Non-Inverting Input
DCD_DTE Inverting Input
RI Receiver Input
TM Receiver Input
LL Driver Output
Power Supply Input
RL Driver Output
-2xVCC Charge Pump Output
Charge Pump Capacitor
Signal Ground
Charge Pump Capacitor
Charge Pump Capacitor
Power Supply Input
Charge Pump Capacitor
2xVCC Charge Pump Output
Signal Ground
DTR Inverting Output
No Connect
Power Supply Input
DTR Non-Inverting Output
DCD Non-Inverting Output
Power Supply Input
DCD Inverting Output
Signal Ground
RTS Inverting Output
Power Supply Input
RTS Non-Inverting Output
Signal Ground
ST Inverting Output
Power Supply Input
ST Termination Referance
ST Non-Inverting Output
Signal Ground
TxCE Inverting Output
5V Power Supply Input
ST Termination Referance
TxCE Non-Inverting Output
Signal Ground
TxD Inverting Output
5V Power Supply Input
ST Termination Referance
TxD Non-Inverting Output
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.comSP508E_100_072412