
DS21Q55 Quad T1/E1/J1 Transceiver
32 of 237
PIN
B2
V15
L4
A16
B1
U15
Y11
Y14
Y17
Y20
J2
D15
E2
W17
L2
B16
C1
Y18
K1
C15
D2
V16
G1
D12
D1
V12
H1
F17
G3
W14
Y10
Y13
Y16
Y19
P1
J17
E4
W18
R2
T2
H19
J18
D4
D5
V20
NAME
RPOSI3
RPOSI4
RPOSO1
RPOSO2
RPOSO3
RPOSO4
RRING1
RRING2
RRING3
RRING4
RSER1
RSER2
RSER3
RSER4
RSIG1
RSIG2
RSIG3
RSIG4
RSIGF1
RSIGF2
RSIGF3
RSIGF4
RSYNC1
RSYNC2
RSYNC3
RSYNC4
RSYSCLK1
RSYSCLK2
RSYSCLK3
RSYSCLK4
RTIP1
RTIP2
RTIP3
RTIP4
RVDD1
RVDD2
RVDD3
RVDD4
RVSS1
RVSS1
RVSS2
RVSS2
RVSS3
RVSS3
RVSS4
TYPE
I
I
O
O
O
O
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
I/O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
–
–
–
–
–
–
–
–
–
–
–
FUNCTION
Receive Positive Data for the Framer, Transceiver #3
Receive Positive Data for the Framer, Transceiver #4
Receive Positive Data from the LIU, Transceiver #1
Receive Positive Data from the LIU, Transceiver #2
Receive Positive Data from the LIU, Transceiver #3
Receive Positive Data from the LIU, Transceiver #4
Receive Analog Ring Input, Transceiver #1
Receive Analog Ring Input, Transceiver #2
Receive Analog Ring Input, Transceiver #3
Receive Analog Ring Input, Transceiver #4
Receive Serial Data, Transceiver #1
Receive Serial Data, Transceiver #2
Receive Serial Data, Transceiver #3
Receive Serial Data, Transceiver #4
Receive Signaling Output, Transceiver #1
Receive Signaling Output, Transceiver #2
Receive Signaling Output, Transceiver #3
Receive Signaling Output, Transceiver #4
Receive Signaling Freeze Output, Transceiver #1
Receive Signaling Freeze Output, Transceiver #2
Receive Signaling Freeze Output, Transceiver #3
Receive Signaling Freeze Output, Transceiver #4
Receive Sync, Transceiver #1
Receive Sync, Transceiver #2
Receive Sync, Transceiver #3
Receive Sync, Transceiver #4
Receive System Clock, Transceiver #1
Receive System Clock, Transceiver #2
Receive System Clock, Transceiver #3
Receive System Clock, Transceiver #4
Receive Analog Tip Input, Transceiver #1
Receive Analog Tip Input, Transceiver #2
Receive Analog Tip Input, Transceiver #3
Receive Analog Tip Input, Transceiver #4
Receive Analog Positive Supply
Receive Analog Positive Supply
Receive Analog Positive Supply
Receive Analog Positive Supply
Receive Analog Signal Ground
Receive Analog Signal Ground
Receive Analog Signal Ground
Receive Analog Signal Ground
Receive Analog Signal Ground
Receive Analog Signal Ground
Receive Analog Signal Ground