m28333-3x Mindspeed Technologies, m28333-3x Datasheet - Page 20

• Manufacturer Part Number: m28333-3x
• Description: Single/dual/triple E3/ds3/sts-1 Line Interface Unit
• Manufacturer: Mindspeed Technologies

1.0 Pin Description
1.1 Pin Assignments
Table 1-1. M2833i-3x Pin Definitions (6 of 9)
1-10
M28331-3x M28332-3x M28333-3x
55
—
—
—
71
—
—
—
72
—
—
—
56
—
—
—
Pin #
—
91
34
—
—
93
32
—
—
94
31
—
—
90
35
—
—
91
55
34
—
93
71
32
—
94
72
31
—
90
56
35
Signal Name
Mindspeed Technologies
RLOOP1
RLOOP2
RLOOP3
LLOOP1
LLOOP2
LLOOP3
RLOOP
LLOOP
LBO1
LBO2
LBO3
XOE1
XOE2
XOE3
LBO
XOE
Transmit line
Ch1 build-out
mode
Transmit line
Ch2 build-out
mode
Transmit line
Ch3 build-out
mode
Local loopback
enable Ch1
Local loopback
enable Ch2
Local loopback
enable Ch3
Remote
loopback enable
Ch1
Remote
loopback enable
Ch2
Remote
loopback enable
Ch3
Transmit output
enable Ch1
Transmit output
enable Ch2
Transmit output
enable Ch3
Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
I/O/P
I
I
I
I
I
I
I
I
I
I
I
I
™
M28331/M28332/M28333 (–3x)
Line build-out mode per channel, based on
the length of cable on the transmit side of
the cross-connect block. This bit is
overridden and the pulse shaper is disabled
(no pulse shaping) if E3MODE = 1.
1 = Inserts line build-out into the transmit
channel. Usually used when the transmit
cable is less than 450 feet in length.
0 = Line build-out bypassed (not inserted).
Usually used when the transmit cable is
greater than 450 feet in length.
Local loopback enable per channel. The
transmit data is looped back immediately
from the encoder to the decoder in place of
the received data.
1 = local loopback enabled
0 = local loopback disabled
Remote loopback enable per channel. The
receive data, retimed after clock recovery, is
looped back into the AMI generator in place
of the transmit data.
1 = remote loopback enabled
0 = remote loopback disabled
Transmit output enable per channel.
1 = transmit line output driver enabled
0 = transmit output driver set to high
impedance state
Notes
28333-DSH-003-A