DS21354LN+ Maxim Integrated Products, DS21354LN+ Datasheet - Page 38
DS21354LN+
Manufacturer Part Number
DS21354LN+
Description
IC TXRX E1 1-CHIP 3.3V 100-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2154LNA2.pdf
(124 pages)
Specifications of DS21354LN+
Function
Single-Chip Transceiver
Interface
E1, HDLC
Number Of Circuits
1
Voltage - Supply
3.14 V ~ 3.47 V
Current - Supply
75mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
Includes
Remote and AIS Alarm Detector / Generator
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
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DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
Automatic Alarm Generation
5.4.
The device can be programmed to automatically transmit AIS or Remote Alarm. When automatic AIS
generation is enabled (CCR2.5 = 1), the device monitors the receive-side framer to determine if any of the
following conditions are present: loss-of-receive frame synchronization, AIS alarm (all ones) reception,
or loss of receive carrier (or signal). If any one (or more) of the above conditions is present, then the
framer will either force an AIS alarm.
When automatic RAI generation is enabled (CCR2.4 = 1), the framer monitors the receive side to
determine if any of the following conditions are present: loss of receive frame synchronization, AIS alarm
(all one’s) reception, or loss of receive carrier (or signal) or if CRC4 multiframe synchronization cannot
be found within 128ms of FAS synchronization (if CRC4 is enabled). If any one (or more) of the above
conditions is present, then the framer will either transmit a RAI alarm.
RAI generation conforms to ETS 300 011 specifications and a constant Remote Alarm will be transmitted
if the DS21354/DS21554 cannot find CRC4 multiframe synchronization within 400ms as per G.706.
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