DS26303L-XXX DALLAS [Dallas Semiconductor], DS26303L-XXX Datasheet - Page 12

• Manufacturer Part Number: DS26303L-XXX
• Description: 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit
• Manufacturer: DALLAS [Dallas Semiconductor]

RPOS1/RDATA1
RPOS2/RDATA2
RPOS3/RDATA3
RPOS4/RDATA4
RPOS5/RDATA5
RPOS6/RDATA6
RPOS7/RDATA7
RPOS8/RDATA8
TPOS1/TDATA1
TPOS2/TDATA2
TPOS3/TDATA3
TPOS4/TDATA4
TPOS5/TDATA5
TPOS6/TDATA6
TPOS7/TDATA7
TPOS8/TDATA8
TNEG1
TNEG2
TNEG3
TNEG4
TNEG5
TNEG6
TNEG7
TNEG8
TCLK1
TCLK2
TCLK3
TCLK4
TCLK5
TCLK6
TCLK7
TCLK8
NAME
PIN
108
101
109
102
144
107
100
111
104
142
37
30
80
73
38
31
79
72
36
29
81
74
40
33
77
70
8
1
7
9
2
5
tri-state
TYPE
O,
I
I
I
DIGITAL Tx/Rx
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
Transmit Positive-Data Input for Channel 1 to 8/Transmit Data
Input for Channel 1 to 8
TPOS[1:8]: When the DS26303 is configured in dual-rail mode, the
data input to TPOSn is output as a positive pulse on the line
(TTIPn and TRINGn) as follows:
TPOSn
0
0
1
1
TDATA[1:8]: When the device is configured in single-rail mode,
NRZ data is input to TDATAn. The data is HDB3, B8ZS or AMI
encoded before being output to the line.
Transmit Negative Data for Channel 1 to 8. When the DS26303
is configured in dual-rail mode, the data input to TNEGn is output
as a negative pulse on the line (TTIPn and TRINGn) as follows:
TPOSn
0
0
1
1
Transmit Clock for Channel 1 to 8. The transmit clock must be
1.544MHz for T1 or 2.048MHz for E1 mode. TCLKn is the clock
used to sample the data on TPOSn/TNEGn or TDATn on the
falling edge. TCLKn can be inverted.
If TCLKn is high for 16 or more MCLKs, then an all-ones signal is
transmitted on the corresponding line (TTIPn and TRINGn). When
TCLKn starts clocking again, normal operation will resume on the
corresponding line.
If TCLKn is low for 64 or more MCLKs, the corresponding
transmitter channel will power down and the line will be put into
high impedance. When TCLKn starts clocking again the
corresponding transmitter will power up, resume normal operation,
and the line will come out of high impedance.
Receive Positive-Data Output for Channel 1 to 8/Receive Data
Output for Channel 1 to 8
RPOS[1:8]: In dual-rail mode, this output indicates a positive pulse
on RTIPn/RRINGn. If a given receiver is in power-down mode, the
corresponding RPOSn pin is high impedance.
RDATA[1:8]: In single-rail mode, NRZ data is output to this pin.
Note: During an RLOS condition, the RPOSn/RDATAn output
remainactive.
12 of 101
TNEGn
0
1
0
1
TNEGn
0
1
0
1
Output Pulse
Output Pulse
Space
Negative Pulse
Positive Pulse
Space
Space
Negative Pulse
Positive Pulse
Space
FUNCTION