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DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
13 of 124
PIN NAME
TYPE
FUNCTION
78
RLINK
O
Receive Link Data
99
RLOS/LOTC
O
Receive Loss of Sync/Loss of Transmit Clock
96
RMSYNC
O
Receive Multiframe Sync
87
RNEGI
I
Receive Negative Data Input
90
RNEGO
O
Receive Negative Data Output
86
RPOSI
I
Receive Positive Data Input
91
RPOSO
O
Receive Positive Data Output
17
RRING
I
Receive Analog Ring Input
95
RSER
O
Receive Serial Data
94
RSIG
O
Receive Signaling Output
93
RSIGF
O
Receive Signaling Freeze Output
98 RSYNC
I/O
Receive
Sync
100
RSYSCLK
I
Receive System Clock
16
RTIP
I
Receive Analog Tip Input
18
RVDD
—
Receive Analog Positive Supply
19, 20, 24
RVSS
—
Receive Analog Signal Ground
33
TCHBLK
O
Transmit Channel Block
53
TCHCLK
O
Transmit Channel Clock
46 TCLK
I
Transmit
Clock
40
TCLKI
I
Transmit Clock Input
41
TCLKO
O
Transmit Clock Output
50 TDATA
I
Transmit
Data
49
TESO
O
Transmit Elastic Store Output
14 TEST
I
Test
34
TLCLK
O
Transmit Link Clock
35
TLINK
I
Transmit Link Data
39
TNEGI
I
Transmit Negative Data Input
42
TNEGO
O
Transmit Negative Data Output
38
TPOSI
I
Transmit Positive Data Input
43
TPOSO
O
Transmit Positive Data Output
32
TRING
O
Transmit Analog Ring Output
47
TSER
I
Transmit Serial Data
48 TSIG
I
Transmit
Signaling
Input
52
TSSYNC
I
Transmit System Sync
37 TSYNC
I/O
Transmit
Sync
51
TSYSCLK
I
Transmit System Clock
29
TTIP
O
Transmit Analog Tip Output
31
TVDD
—
Transmit Analog Positive Supply
30
TVSS
—
Transmit Analog Signal Ground
77
WR
(R/
W
)
I
Write Input (Read/Write), Active Low
22
XTALD
O
Quartz Crystal Driver