CN8380EPF CONEXANT [Conexant Systems, Inc], CN8380EPF Datasheet - Page 29

• Manufacturer Part Number: CN8380EPF
• Description: integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CN8380
Quad T1/E1 Line Interface
Figure 2-4. Raw Mode Receiver Signals
N8380DSA
2.3.1.1 Raw Receive
2.3.1.3 Bridge Mode
2.3.1.2 Sensitivity
8380_009
(RAW Mode)
(RAW Mode)
(RAW Mode)
Equalized
Received
RPOSO
RNEGO
Internal
RCKO
Signal
Mode
Optionally, the data slicer outputs, before re-timing, can be routed directly to the
RPOSO and RNEGO digital output pins. This option (raw receive mode) is
selected by asserting the
RAWMD register bit [RLIU_CR; addr n1] in Host Mode. In raw receive mode,
RCKO is replaced by the logical OR of the RPOSO and RNEGO output signals.
recovery.
The receiver is capable of recovering signals with cable attenuation in the range of
+3 to –12 dB in E1 and T1 modes. The receiver is configured by setting register
bits appropriately in Host Mode or by setting configuration pins in Hardware
Mode. See
Table 2-1. Line Compatible Modes
In Host Mode, the receiver allows interfacing to network test (MON) points
which are resistively attenuated with resisters in series with transmit and receive
Tip and Ring signals. The Bridge Monitor Level is –20 dB. Bridge operation is
enabled by setting register bit ATTEN [addr n1] to 1. In this mode, RALOS
detection and squelch operation are disabled.
T1
T1/E1 20 dB
Bridge
E1
This mode is useful in applications which provide external clock and data
Mode
Data Slicer Level
(50% of Peak)
Figure 2-4
Table
Advance Information
2-1for line compatible modes.
+3 dB to –12 dB
–17 dB to –26 dB
+3 dB to –12 dB
Receiver Sensitivity
Conexant
illustrates the raw mode receiver signals.
RAWMD
[n] pin in Hardware Mode or by asserting the
Threshold
RALOS
–18 dB
–18 dB
NA
BPV
Threshold
Squelch
–18 dB
–18 dB
NA
2.0 Circuit Description
100 zeros
100 zeros
32 zeros
2.3 Receiver
Detect
RLOS
2-7