CX28332 Conexant Systems, CX28332 Datasheet - Page 30

• Manufacturer Part Number: CX28332
• Description: (CX28331 - CX28333) Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
• Manufacturer: Conexant Systems

1.0 Pin Description
1.1 Pin Assignments
Table 1-2. CX2833i-3x Pin Definitions (7 of 8)
1-20
CX28331-3x CX28332-3x CX28333-3x
58
—
—
—
99
97
96
11
—
14
—
—
—
—
—
59
—
—
—
54
Pin #
—
81
44
—
80
97
96
—
—
21
24
—
—
—
80
45
—
54
1
4
—
81
58
44
99
97
96
—
—
11
14
21
24
—
80
59
45
54
1
4
TMONP
TMON1P
TMONM
TMON1M
TMON2P
TMON2M
TMON3P
TMON3M
TLOS
TLOS1
TLOS2
TLOS3
TMONTST
Signal Name
REFCLK1
REFCLK2
REFCLK3
REFCLK
RBIAS
Reset
GPD
Conexant
Reference clock
for Ch1
Reference clock
for Ch2
Reference clock
for Ch3
Bias resistor
Reset
Global Power
down
Ch1 positive
input
Ch1 negative
input
Ch2 positive
input
Ch2 negative
input
Ch3 positive
input
Ch3 negative
input
TX loss of signal
Ch1 Output
TX loss of signal
Ch2 Output
TX loss of signal
Ch3 Output
TX monitor test
pin
Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
I/O/P
I/O
I/O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
Reference clock from off-chip.
This clock should be set to one of the
following:
The clock rate should correspond to the
mode of operation that has been chosen for
the channel.
A 12.1 k ± 1% resistor tied from this pin
to ground provides the current reference to
the entire chip.
Asynchronous reset (reset entire device).
Power down (Static Idd testing).
Transmit monitor input pins are normally
tied to their respective transmit line
outputs, i.e., (TMON1P
TMON1M
when the monitor inputs detect no signal.
TLOS outputs when TMONTST is high.
This is used to test board level functionality
downstream from the TLOS outputs.
0 = Power down disable
1 = Power down active
Loss of signal outputs are active high
The TX monitor test pin will assert all
•
•
•
E3 rate (34.368 MHz)
DS3 rate (44.736 MHz)
STS-1 rate (51.84 MHz)
CX28331/CX28332/CX28333
TLINE1M).
(2)
Notes
TLINE1P and
100985A