
DS21Q55 Quad T1/E1/J1 Transceiver
33 of 237
PIN
W19
W1
F20
C11
U20
V10
A18
B8
L18
Y9
B19
B10
M19
V6
D19
C8
P20
W7
E18
A7
P19
V3
E20
D6
T18
W5
E19
C6
T19
R1
F19
D8
R20
T3
B20
D9
N20
W3
C20
A8
R19
V7
C19
C9
N19
NAME
RVSS4
TCHBLK1
TCHBLK2
TCHBLK3
TCHBLK4
TCHCLK1
TCHCLK2
TCHCLK3
TCHCLK4
TCLK1
TCLK2
TCLK3
TCLK4
TCLKI1
TCLKI2
TCLKI3
TCLKI4
TCLKO1
TCLKO2
TCLKO3
TCLKO4
TLCLK1
TLCLK2
TLCLK3
TLCLK4
TLINK1
TLINK2
TLINK3
TLINK4
TNEGI1
TNEGI2
TNEGI3
TNEGI4
TNEGO1
TNEGO2
TNEGO3
TNEGO4
TPOSI1
TPOSI2
TPOSI3
TPOSI4
TPOSO1
TPOSO2
TPOSO3
TPOSO4
TYPE
–
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
O
O
O
O
I
I
I
I
O
O
O
O
FUNCTION
Receive Analog Signal Ground
Transmit Channel Block, Transceiver #1
Transmit Channel Block, Transceiver #2
Transmit Channel Block, Transceiver #3
Transmit Channel Block, Transceiver #4
Transmit Channel Clock, Transceiver #1
Transmit Channel Clock, Transceiver #2
Transmit Channel Clock, Transceiver #3
Transmit Channel Clock, Transceiver #4
Transmit Clock, Transceiver #1
Transmit Clock, Transceiver #2
Transmit Clock, Transceiver #3
Transmit Clock, Transceiver #4
Transmit Clock Input for the LIU, Transceiver #1
Transmit Clock Input for the LIU, Transceiver #2
Transmit Clock Input for the LIU, Transceiver #3
Transmit Clock Input for the LIU, Transceiver #4
Transmit Clock Output from the Framer, Transceiver #1
Transmit Clock Output from the Framer, Transceiver #2
Transmit Clock Output from the Framer, Transceiver #3
Transmit Clock Output from the Framer, Transceiver #4
Transmit Link Clock, Transceiver #1
Transmit Link Clock, Transceiver #2
Transmit Link Clock, Transceiver #3
Transmit Link Clock, Transceiver #4
Transmit Link Data, Transceiver #1
Transmit Link Data, Transceiver #2
Transmit Link Data, Transceiver #3
Transmit Link Data, Transceiver #4
Transmit Negative Data Input for the LIU, Transceiver #1
Transmit Negative Data Input for the LIU, Transceiver #2
Transmit Negative Data Input for the LIU, Transceiver #3
Transmit Negative Data Input for the LIU, Transceiver #4
Transmit Negative Data Output from Framer, Transceiver #1
Transmit Negative Data Output from Framer, Transceiver #2
Transmit Negative Data Output from Framer, Transceiver #3
Transmit Negative Data Output from Framer, Transceiver #4
Transmit Positive Data Input for the LIU, Transceiver #1
Transmit Positive Data Input for the LIU, Transceiver #2
Transmit Positive Data Input for the LIU, Transceiver #3
Transmit Positive Data Input for the LIU, Transceiver #4
Transmit Positive Data Output from Framer, Transceiver #1
Transmit Positive Data Output from Framer, Transceiver #2
Transmit Positive Data Output from Framer, Transceiver #3
Transmit Positive Data Output from Framer, Transceiver #4