MX589 데이터 시트보기 (PDF) - CML Microsystems Plc

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MX589

High Speed GMSK Modem

CML Microsystems Plc 

COMMUNICATION SEMICONDUCTORS

DATA BULLETIN

MX589

High Speed GMSK Modem

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

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

TX ENABLE

TX PS

TX DATA

XTAL/CLOCK

XTAL

ClkDIVA

ClkDIVB

BT

VDD

RXHold

PLLacq

RXDCacq

RX PS

RX SIGNAL IN

RX FEEDBACK

DATA RETIME &

LEVEL SHIFT

CLOCK

DIVIDER

RX CIRCUIT

CONTROL

VBIAS

+

-

RX

FILTER

VBIAS

TX

FILTER

RX DATA

DETECTION

RX S/N

DETECTION

VBIAS

TX OUT

TX CLK

RX DATA

RX S/N

RX CLOCK

RX DC LEVEL

MEASURE

DOC1

DOC2

RX CLK

VSS

VBIAS

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.

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