73M2901CE Data Sheet
DS_2901CE_031
Table of Contents
1
Hardware Description......................................................................................................................... 4
1.1
1.2
1.3
1.4
1.5
Power Supply............................................................................................................................. 4
Low Power Mode....................................................................................................................... 4
Analog Line / Hybrid Interface ................................................................................................... 4
Interrupt pins.............................................................................................................................. 4
Crystal Oscillator ....................................................................................................................... 5
1.5.1 Specifying a Crystal......................................................................................................... 5
Reset ......................................................................................................................................... 5
Asynchronous and Synchronous Serial Data Interface............................................................. 5
1.6
1.7
2
3
Pinout................................................................................................................................................... 6
Pin Descriptions.................................................................................................................................. 7
3.1
3.2
3.3
3.4
3.5
Power Pins................................................................................................................................. 7
Analog Interface Pins ................................................................................................................ 7
Digital Interface Pins.................................................................................................................. 7
External Interrupt Pins............................................................................................................... 8
Oscillator Pins............................................................................................................................ 8
4
Electrical Specifications..................................................................................................................... 9
4.1
4.2
4.3
4.4
4.5
4.6
Absolute Maximum Ratings....................................................................................................... 9
Recommended Operating Conditions ....................................................................................... 9
Receiver..................................................................................................................................... 9
Transmitter............................................................................................................................... 10
Maximum Transmit Level ........................................................................................................ 10
DC Characteristics, Vcc = 3.3 V.............................................................................................. 11
4.6.1 DC Supply Current, VDD = 2.7 V (Battery EOL) ........................................................... 11
4.6.2 DC Supply Current ,VDD = 3.0 V .................................................................................. 11
4.6.3 DC Supply Current VDD = 3.3 V ................................................................................... 12
4.6.4 DC Supply Current VDD = 3.6 V ................................................................................... 12
5
6
Firmware Description ....................................................................................................................... 13
5.1
5.2
Firmware Overview.................................................................................................................. 13
Firmware Features .................................................................................................................. 13
Design Considerations..................................................................................................................... 14
6.1
6.2
6.3
Layout Considerations............................................................................................................. 14
73M2901CE Design Compatibility........................................................................................... 14
Telephone Line Interface......................................................................................................... 14
7
8
9
Reference Designs............................................................................................................................ 15
7.1
7.2
Low Cost Design Using DSP Ring and Status Monitoring...................................................... 15
Reference Design Using Traditional Hardware Line Monitoring ............................................. 16
Modem Performance Characteristics ............................................................................................. 18
8.1
8.2
BER vs. SNR ........................................................................................................................... 18
BER vs. Receive Level............................................................................................................ 18
Package Mechanical Drawing.......................................................................................................... 19
9.1
9.2
32-pin QFN .............................................................................................................................. 19
32-pin TQFP............................................................................................................................ 20
10 Ordering Information........................................................................................................................ 21
11 Related Documentation.................................................................................................................... 21
12 Contact Information.......................................................................................................................... 21
Revision History........................................................................................................................................ 22
2
Rev. 3.3
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