DS26303G-120 MAXIM [Maxim Integrated Products], DS26303G-120 Datasheet - Page 12

• Manufacturer Part Number: DS26303G-120
• Description: 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit
• Manufacturer: MAXIM [Maxim Integrated Products]

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
RNEG1/CV1
RNEG2/CV2
RNEG3/CV3
RNEG4/CV4
RNEG5/CV5
TNEG1
TNEG2
TNEG3
TNEG4
TNEG5
TNEG6
TNEG7
TNEG8
TCLK1
TCLK2
TCLK3
TCLK4
TCLK5
TCLK6
TCLK7
TCLK8
NAME
eLQFP
108
101
109
102
144
107
100
111
104
142
112
37
30
80
73
38
31
79
72
36
29
81
74
40
33
77
70
41
34
76
69
8
1
7
9
2
5
PIN
PBGA
N12
D12
M13
C13
M12
N13
B13
D13
B12
N14
B14
D14
P13
A13
P12
A12
L13
L12
L14
M2
M3
N2
D2
N3
D3
N1
D1
C2
B2
B3
B1
P2
A2
P3
L2
L3
L1
tri-state
tri-state
TYPE
O,
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 (TIP
and RING).
TDATA[1:8]: When the device is configured in single-rail mode,
NRZ data is input to TDATAn. The data is encoded HDB3/B8ZS or
AMI 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 mark on the line as follows:
TPOSn
0
0
1
1
When TNEGn is pulled High for more than 16 consecutive TCLK
clock cycles, single-rail I/O is selected.
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 TPOS/TNEG or TDAT on the falling edge.
The expected TCLK can be inverted.
If TCLKn is high for 16 or more MCLKs, then transmit all-ones
(TAO) signals to the line side of the corresponding transmit
channel. When TCLKn starts clocking again, normal operation will
begin again for the corresponding transmit channel.
If TCLKn is low for 64 or more MCLKs, the corresponding transmit
channel on the line side powers down and must be put into high
impedance. When TCLKn starts clocking again the corresponding
transmit channel powers up and comes 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, the NRZ data output indicates a
positive pulse on RTIP/RRING. If a given receiver is in power-
down mode, the associated RPOS pin is high impedance.
RDATA[1:8]: In single-rail mode, NRZ data is output to the pin.
Note: During an RLOS condition, the RPOS/RDATA outputs
remain active.
Receive Negative-Data Output for Channel 1 to 8/Code
Violation for Channel 1 to 8
RNEG[1:8]: In dual-rail mode, the NRZ data output indicates a
negative pulse on RTIP/RRING. If a given receiver is in power-
down mode, the associated RNEG pin is high impedance.
CV[1:8]: In single-rail mode, bipolar violation, code violation, and
excessive zeros are reported by driving CVn high for one clock
12 of 97
TNEGn
0
1
0
1
Output Pulse
Space
Negative Mark
Positive Mark
Space
FUNCTION