m28333-3x Mindspeed Technologies, m28333-3x Datasheet - Page 23

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

M28331/M28332/M28333 (–3x)
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Table 1-1. M2833i-3x Pin Definitions (9 of 9)
28333-DSH-003-A
NOTE(S):
(1)
(2)
3. All digital input pins contain a 75 k pull-down resistor from input to DVSS.
M28331-3x M28332-3x M28333-3x
21–24, 27,
28, 30–32,
34–50, 52,
1–4, 7, 8,
76–91,
93–95
This pin should be connected to 3.3 V in an all-3.3 V design.
Placing a capacitor from this pin to ground may result in instabilities.
11
—
14
—
—
—
—
—
59
—
—
—
54
17–18, 50,
52, 55–73
11–14,
Pin #
—
—
21
24
—
—
—
80
45
—
54
1
4
50, 52
—
—
11
14
21
24
—
80
59
45
54
1
4
Signal Name
TMONP
TMON1P
TMONM
TMON1M
TMON2P
TMON2M
TMON3P
TMON3M
TLOS
TLOS1
TLOS2
TLOS3
TMONTST
Mindspeed Technologies
—
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
No connect
Description
I/O/P
—
O
O
O
I
I
I
I
I
I
I
™
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.
Not connected.
Loss of signal outputs are active high
The TX monitor test pin will assert all
⇒
TLINE1M).
Notes
1.0 Pin Description
1.1 Pin Assignments
⇒
TLINE1P and
1-13