MX589
COMMUNICATION SEMICONDUCTORS
DATA BULLETIN
Features
Applications
•
Data Rates from 4kbps to 64kbps
•
Point of Sale Terminals
•
Full or Half Duplex Gaussian Minimum Shift Keying
(GMSK) Operation
•
Low Power Wireless Data Link for PCs,
Laptops, and Printers
•
Selectable BT: (0.3 or 0.5)
•
Data for GPS/Differential GPS
•
Low Power
3.0V, 20kbps, 1.5mA typ.
5.0V, 64kbps, 4.0mA typ.
•
Portable Wireless Data Applications
•
Cellular Digital Packet Data (CDPD)
Mobitex™ Mobile Data System
•
Low Current Non-DSP Solution
•
Small TSSOP size fits PCMCIA / PC CARDs
TX ENABLE
TX PS
VBIAS
DATA RETIME &
LEVEL SHIFT
TX DATA
VBIAS
TX
FILTER
TX OUT
XTAL/CLOCK
TX CLK
XTAL
ClkDIVA
ClkDIVB
BT
VDD
RX DATA
DETECTION
CLOCK
DIVIDER
RX S/N
DETECTION
RXHold
PLLacq
RXDCacq
RX CIRCUIT
CONTROL
RX CLOCK
RX SIGNAL IN
RX S/N
RX CLK
VSS
VBIAS
RX PS
RX DATA
+
-
RX
FILTER
RX DC LEVEL
MEASURE
VBIAS
RX FEEDBACK
DOC1
DOC2
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
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
Doc. # 204800103.011
All trademarks and service marks are held by their respective companies.
