CX28331-1X CONEXANT [Conexant Systems, Inc], CX28331-1X Datasheet - Page 19

• Manufacturer Part Number: CX28331-1X
• Description: Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CX28331/CX28332/CX28333
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Table 1-1. CX2833i-1x Pin Definitions (5 of 6)
100985A
CX28331-1x CX28332-1x CX28333-1x
46
—
—
—
12
—
—
—
—
—
—
13
—
—
—
16
—
—
—
60
41
79
73
28
9
Pin #
—
70
31
—
—
20
—
—
17
—
—
21
—
—
24
—
60
41
79
73
28
4
1
5
8
—
70
46
31
—
12
20
—
17
—
13
21
—
16
24
60
41
79
73
28
4
1
9
5
8
Signal Name
DVDDIO
DVSSIO
RVDD1
RVDD2
RVDD3
DVDDC
REQH1
REQH2
REQH3
TVDD1
TVDD2
TVDD3
RVSS1
RVSS2
RVSS3
DVSSC
TVSS1
TVSS2
TVSS3
RVDD
REQH
TVDD
RVSS
TVSS
VGG
Power/Ground
Conexant
Ch1 Receive High EQ
Gain Enable
Ch2 Receive High EQ
Gain Enable
Ch3 Receive High EQ
Gain Enable
TX power Ch1
TX power Ch2
TX power Ch3
TX ground Ch1
TX ground Ch2
TX ground Ch3
RX power Ch1
RX power Ch2
RX power Ch3
RX ground Ch1
RX ground Ch2
RX ground Ch3
Digital core power
Digital core ground
5 V/3.3 V ESD pin
Digital I/O power
Digital ground
Description
(1)
I/O/P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
I
I
The equalizer in the CX2833i has
two gain settings. The higher gain
setting is designed to optimally
equalize a nominally-shaped (meets
the pulse template), pulse-driven
DS3 or STS-1 waveform that is
driven through 0–900 feet of cable.
Square-shaped pulses such as E3
or DS3-HIGH require less
high-frequency gain and should use
the low EQ gain setting.
REQH = 1 high EQ gain
(DS3/STS-1 modes)
REQH = 0 low EQ gain (E3/DS3
Square Modes)
Power pins for transmit circuitry
per channel (3.3 V).
Ground pins for transmit circuitry
per channel.
Power pins for receive circuitry per
channel (3.3 V).
Connect to 3.3 V power.
Ground pins for receive circuitry
per channel.
Connect to ground.
Digital core power for all channels
(3.3 V).
Digital core ground for all channels.
5 V supply for 5 V-tolerant, digital
pad ESD diodes. No static power is
drawn from pin.
Connect to 3.3 V digital power.
Digital ground.
1.0 Pin Description
Notes
1.1 Pin Assignments
1-9