DS21554LB+ Maxim Integrated Products, DS21554LB+ Datasheet - Page 52
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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7.4.
FAS Count Register 1 (FASCR1) is the most significant word and FASCR2 is the least significant word
of a 12–bit counter that records word errors in the Frame Alignment Signal in time slot 0. This counter is
disabled when RLOS is high. FAS errors will not be counted when the framer is searching for FAS
alignment and/or synchronization at either the CAS or CRC4 multiframe level. Since the maximum FAS
word error count in a one second period is 4000, this counter cannot saturate.
FASCR1: FAS ERROR COUNT REGISTER 1 (Address = 02 Hex)
FASCR2: FAS ERROR COUNT REGISTER 2 (Address = 04 Hex)
Note 1: The lower two bits of FASCR2 at address 04 are the most significant bits of the 10-bit E-Bit counter.
Note 2: The lower two bits of FASCR1 at address 02 are the most significant bits of the 10-bit CRC4 error counter.
SYMBOL
(MSB)
FAS11
FAS5
FAS11
FAS0
FAS Error Counter
FAS10
FAS4
POSITION
FASCR1.7
FASCR2.2
FAS9
FAS3
MSB of the 12-Bit FAS Error Count
LSB of the 12-Bit FAS Error Count
FAS8
FAS2
52 of 124
FAS7
FAS1
NAME AND DESCRIPTION
FAS6
FAS0
(Note 1)
(Note 2)
(Note 1)
(Note 2)
(LSB)
FASCR1
FASCR2
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