MX614
COMMUNICATION SEMICONDUCTORS
DATA BULLETIN
Bell 202 Compatible Modem
PRELIMINARY INFORMATION
Applications
Features
• 1200bps - 1800bps half duplex Bell 202
• Low Voltage Operation (3.3V to 5.0V)
• Low Power Operation
Compatible Modem
• Optional 1200bps Data Retiming Facility
1mA typ. @ 3.3V Operating Mode
1µA typ. Zero-Power Mode
can eliminate external UART
• Optional 5bps and 150bps Back Channel
• Optional Line Equalization
• Standard 3.58MHz Xtal/Clock
• Telephone Telemetry Applications
Status
Control
Telephone
Line
Line
Interface
µC
MX614
Data
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 associated µC when operating at 1200bps. An optional line equalizer
has been incorporated into the receive path and is controlled by an external logic level.
The MX614 may be used in a wide range of telephone telemetry systems. A very low current “Zero Power
Mode (1µA typ.) and an operating current of 1mA typ. @ VDD = 3.3V, make the MX614 ideal for portable,
terminal and line powered applications. A standard 3.58MHz Xtal/Clock is required and the device operates
from a 3.0V to 5.5V supply.
The MX614 is available in 24-pin TSSOP (MX614TN), 16-pin SOIC (MX614DW) and 16-pin PDIP (MX614P)
packages.
2000 MX-COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480162.004
4800 Bethania Station Road, Winston-Salem, NC 27105 USA
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