DS21554LB+ Maxim Integrated Products, DS21554LB+ Datasheet - Page 32
DS21554LB+
Manufacturer Part Number
DS21554LB+
Description
IC TXRX E1 5V 100-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2154LNA2.pdf
(124 pages)
Specifications of DS21554LB+
Function
Single-Chip Transceiver
Interface
E1, HDLC, J1, T1
Number Of Circuits
1
Voltage - Supply
4.75 V ~ 5.25 V
Current - Supply
75mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
Includes
Remote and AIS Alarm Detector / Generator
Product
Framer
Number Of Transceivers
1
Data Rate
1.544 Mbps
Supply Voltage (max)
5.25 V
Supply Voltage (min)
4.75 V
Supply Current (max)
75 mA (Typ)
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Ic Interface Type
Parallel, Serial
Supply Voltage Range
4.75V To 5.25V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
LQFP
No. Of Pins
100
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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5.2.
Once synchronization is accomplished there are certain criteria that can cause a resynchronization. These
criteria are detailed in
Table 5-2. SYNC/RESYNC Criteria
MULTIFRAME
FRAME OR
LEVEL
CRC4
CAS
FAS
Synchronization And Resynchronization
FAS present in frame N
and N + 2, and FAS not
present in frame N + 1
Two valid MF alignment
words found within 8 ms
Valid MF alignment word
found and previous time
slot 16 contains code other
than all zeros
Table
SYNC CRITERIA
5-2. Also see
Figure 18-14
32 of 124
Three consecutive incorrect FAS
received
Alternate (RCR1.2=1) the above
criteria is met or three
consecutive incorrect bit 2 of
non–FAS received
915 or more CRC4 codewords
out of 1000 received in error
Two consecutive MF alignment
words received in error
DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
RESYNC CRITERIA
for a flow chart of the synchronization process.
4.2 and 4.3.2
ITU SPEC.
G.732 5.2
G.706
G.706
4.1.1
4.1.2
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