PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 135

• Manufacturer Part Number: PEF2256EV22NP
• Manufacturer: Lantiq

Specifications of PEF2256EV22NP

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Supplier Unconfirmed

for redundancy purpose (see
one must be switched into transmit line tristate mode. If both channels are configured
identically and supplied with the same system data and clocks, the transmit path can be
switched from one channel to the other without causing a synchronization loss at the
remote end. Due to the use of the receive line monitor mode, this setup is limited to short
haul applications. Switching between both devices can be done through the
microcontroller interface or by using the tristate hardware input pin as shown in the
figure.
Figure 48
For long haul redundancy requirements (see
used to enable the line termination for the active device and to disable it for the stand-by
part. Switching between both devices is controled through the microcontroller interface.
Data Sheet
E1/T1/J1
Transmit
E1/T1/J1
Receive
Line
Line
Protection Switching Application (T1/J1)
Figure
48). While one of them is driving the line, the other
135
Figure
XL1
XL2
RL1
RL2
XL1
XL2
RL1
RL2
49), the analog switches can be
stand-by device
Functional Description T1/J1
active device
TRIST
TRIST
Rev. 1.1, 2005-06-13
RDO
RDO
PEF 2256 H/E
XDI
XDI
1
F56V2_Receiver_2
FALC
®
56