CMX589A Datasheet | Consumer Microcircuits Limited

Features and Applications - Data Rates from 4kbps to 200kbps - Full or Half Duplex Gaussian Filter and Data Recovery for Minimum Shift Keying (GMSK) Designs - Selectable BT: (0.3 or 0.5) - Low Power 3.0V, 20kbps, 1.5m A typ. 5.0V, 64kbps, 4.0m A typ. - Low Current Non-DSP Solution - Small TSSOP Packs fit PCMCIA/PC Cards GMSK Modem - Portable Wireless Data Applications Cellular Digital Packet Data (CDPD) Mobitex™ Mobile Data System - Spread Spectrum Data Links - GPS/Differential GPS Wireless Links - Point-of-Sale Terminals - Low Power Wireless Data Link for PCs, Laptops, and Printers Brief Description The CMX589A is a single-chip synchronous data pump/modem designed for Wireless Data Applications. Employing Gaussian filtering for Minimum shift Keying (GMSK) baseband modulation applications, the CMX589A features a wide range of available data rates from 4k to 200k bps. 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 generated Tx and Rx data clocks. 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 ponents 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 CMX589A may be used with a 3.0V to 5.5V power supply and is available in the following packages: 24-pin TSSOP (CMX589AE2), 24-pin SSOP (CMX589AD5), 24-pin SOIC (CMX589AD2), and 24-pin PDIP (CMX589AP4). © 2002 CML Microsystems Plc GMSK Modem Section Contents Page Features and Applications...