CML Semiconductor Products
Bell 202 Compatible Modem
FX614
D/614/4
October 1997
Advance Information
1.0
Features
•
1200bits/sec 1/2 Duplex Bell 202 compatible Modem with:
•
Optional 5bits/sec and
150bits/sec Back Channel
•
Optional 1200bits/sec Data
Retiming Facility
•
3.0 to 5.5V Supply; 1.0mA at 3V
'Zero-Power' Mode; 1µA
µ
•
Optional Line Equalisation
•
-40°C to +85°C Operating
Temperature
•
16-pin SOIC and DIL Packages
•
3.58MHz Xtal/Clock Rate
1.1
Brief Description
The FX614 is a low power CMOS integrated circuit for the reception or transmission of asynchronous
1200bits/sec data and is suitable for use in Bell 202 type systems. It is also capable of generating the
5bits/sec or 150bits/sec 'back channel'.
The device incorporates an optional Tx and Rx data retiming function that removes the need for a UART in the
associated
µ
C when operating at 1200bits/sec. An optional line equaliser is incorporated into the receive path,
this is controlled by an external logic level.
The FX614 may be used in a wide range of telephone telemetry systems. With a low operating voltage of
3.0V, a very low current 'sleep' mode (1
µ
A) and an operating current of 1mA the device is ideal for portable,
terminal and line powered applications. A 3.58MHz standard Xtal/Clock rate is required and the device
operates from a 3.0V to 5.5V supply. Both SOIC (D4) and Plastic DIL (P3) 16-pin package types are available.
©
1997 Consumer Microcircuits Limited
CMLMICRO [ CML MICROCIRCUITS ]
