Bell 202 Compatible Modem

The MX614 is a low voltage, low power CMOS integrated circuit designed for the reception or transmission of asynchronous 1200bps data. This device is compatible with Bell 202 type systems. The MX614 supports 5bps and 150bps 'back channel' operation. Asynchronous data rates up to 1818bps are also supported.
The MX614 provides an optional Tx and Rx data retiming function which can eliminate, based on user preference, the need for a UART in the associatedµC when operating at 1200bps. An optional line equalizer has been incorporated into the receive path and is controlled by an external logic level.

FEATUREs
•  1200bps - 1800bps half duplex Bell 202 Compatible Modem
•  Optional 1200bps Data Retiming Facility can eliminate external UART
•  Optional 5bps and 150bps Back Channel
•  Optional Line Equalization

 Applications
•  Low Voltage Operation (3.3V to 5.0V)
•  Low Power Operation
   1mA typ. @ 3.3V Operating Mode
   1µA typ. Zero-Power Mode
•  Standard 3.58MHz Xtal/Clock
•  Telephone Telemetry Applications