CMX823 Programmable Paging-Tone Decoder
The CMX823
can decode any combination of up to 32 different in-band tones from a
user-programmed on-chip list, received in any order.
With a decode frequency range of 280Hz to 3500Hz and a Signal-to-Noise Ratio of
-4dB, this ultra low-power product is ideal for the majority of paging and selective
calling applications, offering reliability in even the most hostile of signalling
environments.
Total Versatility
is the thinking behind the design of this multiple-format tone-decoder as, under
serial data control, this product has the selectable option of two measurement modes (Fast and
Slow) to efficiently facilitate various tone format periods, operating conditions and host µController
requirements.
Decode Speed:
Employing two user-defined on-chip lists, the
CMX823
can store up to 32 tones
per list with the ability to rapidly switch between lists to facilitate different toneset formats. Each list
can be further subdivided to allow even faster tone recognition. Tone lists can be dynamically uploaded
by the host µC if required.
Applications
INNOVATIONS
INV/TwoWay/823/1 August 2003
An Ultra-Low-Power Audio Tone Decoder for Paging Operations in Low Signal-to-Noise Environments
www.cmlmicro.com
The CML Advantage
n
Decodes from a List of 32 Tones
n
Two Separate 32-Tone Lists Available
n
All Tone Frequencies are User Defined
n
‘Fast Switch’ Between Tone Lists
n
Superior Signal-to-Noise (-4dB) Performance
n
Selectable ‘Fast’ and ‘Slow’ Measurement Modes
Facilitate All Toneset Formats
n
n
n
n
Integral N
OTONE
Timer
Versatile Status and Interrupt Indications
Control and Data via C-BUS Serial Interface
Low-Power 2.7 Volt Operation with ‘Zero-Power’
Mode
n
Two-Tone and Multi-Tone Tone Pagers
n
Voice Pager Switching and Signalling
n
Selective Calling (Selcall)
n
Revertive Paging
n
Wireless Local Loop Signalling
n
Audio Tone Signalling
n
2.7 to 5.5 Volt Operating Voltage Range
n
Compact 16-Pin TSSOP and DIL Packaging
Decodes Signals Through The Noise Floor!
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
Application Specific Standard Products for Two-Way Radio, Wireline Telecoms and Wireless Data
Two-Way Radio
CMLMICRO [ CML MICROCIRCUITS ]
