COMMUNICATION SEMICONDUCTORS
MX589
High Speed GMSK Modem
Applications
•
•
•
•
•
Point of Sale Terminals
Low Power Wireless Data Link for PCs,
Laptops, and Printers
Data for GPS/Differential GPS
Portable Wireless Data Applications
Cellular Digital Packet Data (CDPD)
Mobitex Mobile Data System
DATA BULLETIN
Features
•
•
•
•
Data Rates from 4kbps to 64kbps
Full or Half Duplex Gaussian Minimum Shift Keying
(GMSK) Operation
Selectable BT: (0.3 or 0.5)
Low Power
3.0V, 20kbps, 1.5mA typ.
5.0V, 64kbps, 4.0mA typ.
Low Current Non-DSP Solution
Small TSSOP size fits PCMCIA / PC CARDs
TX ENABLE
TX PS
TX DATA
XTAL/CLOCK
XTAL
ClkDIVA
ClkDIVB
BT
V
DD
RXHold
PLLacq
RXDCacq
V
BIAS
+
-
RX
FILTER
CLOCK
DIVIDER
DATA RETIME &
LEVEL SHIFT
•
•
V
BIAS
TX
FILTER
V
BIAS
TX OUT
TX CLK
RX DATA
DETECTION
RX S/N
DETECTION
RX DATA
RX S/N
RX CIRCUIT
CONTROL
RX CLOCK
RX CLK
V
SS
RX PS
RX SIGNAL IN
RX FEEDBACK
RX DC LEVEL
MEASURE
DOC1
DOC2
V
BIAS
The MX589 is a single-chip synchronous modem designed for Wireless Data Applications. Employing
Gaussian Minimum shift Keying (GMSK) baseband modulation, the MX589 features a wide range of available
data rates: 4k to 64kbps. Data Rates and the choice of BT (0.3 or 0.5) are pin programmable to provide for
different system requirements.
The Tx and Rx digital data interfaces are bit serial, synchronized to Tx and Rx data clocks generated by the
modem. Separate Tx and Rx Powersave inputs allow full or half-duplex operation. Rx input levels can be set
by suitable AC and DC level adjusting circuitry built with external components around an on-chip Rx Input
Amplifier.
Acquisition, Lock, and Hold of Rx data signals are made easier and faster by the use of Rx Control Inputs to
clamp, detect, and /or hold input data levels and can be set by the
µProcessor
as required. The Rx S/N
output provides an indication of the quality of the received signal.
The MX589 may be used with a 3.0V to 5.5V power supply and is available in the following packages: 24-pin
TSSOP (MX589TN), 24-pin SOIC (MX589DW), and 24-pin PDIP (MX589P).
2001
MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 204800103.011
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
