DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 60
DS21455
Manufacturer Part Number
DS21455
Description
Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
Manufacturer
Maxim Integrated Products
Specifications of DS21455
Product
Framer
Number Of Transceivers
4
Data Rate
64 Kbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
328 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
BGA
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DS21455/DS21458 Quad T1/E1/J1 Transceivers
10.4 T1 Receive-Side Digital-Milliwatt Code Generation
Receive-side digital-milliwatt code generation involves using the receive digital-milliwatt registers
(T1RDMR1/2/3) to determine which of the 24 T1 channels of the T1 line going to the backplane should
be overwritten with a digital-milliwatt pattern. The digital-milliwatt code is an 8-byte repeating pattern
that represents a 1kHz sine wave (1E/0B/0B/1E/9E/8B/8B/9E). Each bit in the T1RDMRx registers
represents a particular channel. If a bit is set to a one, then the receive data in that channel will be
replaced with the digital-milliwatt code. If a bit is set to zero, no replacement occurs.
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