World's First Complete PLCC Packaged Modem Description Xecom's XE

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World's First Complete PLCC Packaged Modem Description Xecom's XE

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XE2420
World's First Complete PLCC Packaged Modem
Description Xecom's XE2420 first complete modem available PLCC package. This package ideal space limited applications. XE2420 aimed remote monitoring applications industrial, commercial residential locations. Xecom offers XE2420 models. base XE2420 provides 2400 data transfer remote monitoring applications. XE2421 adds enhancements which permit share telephone line without interfering with telephone handset. Both models include user transferrable Part Registration permitting direct connection telephone line without further Part testing. XE2420 XE2421 standard PLCC package with unique lead-frame. This package design ideal volume applications where automated assembly efficiently utilized. also provides world's smallest embeddable modem package filling less than quarter cubic inch. Features 84-Pin PLCC Package pins used custom lead frame) Small Size: 1.19 inches long 1.156 inches wide 0.17 inches thick. Data transfer 2400, 1200 Bits Second. (V.22bis, V.22, V.23, V.21, Bell 212A, Bell Protocols) Modem Control Configuration industry standard Commands. Complete integrated includes, Ring Detect, Loop Current Holding Circuit, Hook Switch. Metalic Surge Protection, Telephone Line Transformer XE2421 adds Handset Interrupt Feature permit modem yield phone line demand. User Transferrable Part Registration (pending) Power operation less than Watt. Power down operation less than microWatt
odem
elep terf
XECOM
XE2420
XE2420 Mechanical Specifications
degrees Places)
(top)
coplanarity
Inches
0.170 0.020
Millimeters
4.32 0.51
Index Corner degrees
(bottom) 5.33 30.30 29.41 25.45
0.017 1.187 1.154 0.998 1.120 0.050 0.010 0.045
0.021 1.193 1.158 1.002
4.32 30.15 29.31 25.35 28.45 1.20 0.254 1.15
0.004
0.10
XE2420 XE2421 ABSOLUTE MAXIMUM RATINGS
Storage Temperature Operating Temperature Range1 Maximum Solder Temperature2 Maximum Time Above Eutectic (183O Preheat Dwell Time
-25O +85O +70O seconds seconds
XE2420 XE2421 ordered with Operating Temperature -40O +85O extra cost. Order XE2420-ITR XE2421-ITR specify Industrial Temperature Range (ITR). Xecom recommends that XE2420 mounted 84-Pin PLCC Socket subjected solder reflow
XECOM
XE2420
XE2420 Configuration XE2420 XE2421
Ring /Hint Reset /TXD /RXD /RTS /CTS /DSR /DCD /DTR
(top)
Descriptions
NAME
Ring
DESCRIPTION
Along with signal, Ring provides connection telephone line. Part Rules require 1500 volt isolation barrier between telephone line other circuits. This isolation must preserved throughout system. telephone company places "Battery" voltage across Ring public switched telephone lines. XEV90C will operate regardless polarity this "Battery" voltage. "Battery" voltage drives milliamps loop current. UL1950 requires minimum creepage clearances distances maintained between Ring traces other circuits. Clearance shortest distance between conductive circuits; creepage distance between conductive surfaces along surface.
Along with Ring signal, provides connection telephone line. Part Rules require 1500 volt isolation barrier between telephone line other circuits. This isolation must preserved throughout system. Connection
/Hint
/Hint, Handset Interrupt, active output from XE2421. This used XE2420. XE2421 /Hint indicates that another device attempted sieze attached line. Handset Interrupt activated approximately second another device siezes telephone line while XE2421 on-line. When Handset Interrupt activated, XE2421 initiates automatic disconnect from telephone line. provides uninterrupted power XE2420 ring detect circuit. Placing volt power insures that CD/RI ouput will operate when removed from modem. Ground provides reference voltage host interface signals.
Ground
XECOM
XE2420
XE2420 Descriptions (continued)
NAME
CD/RI
DESCRIPTION
CD/RI signal performs functions XE2420 XE2421. reports local telephone line availibility presence incoming ring signal. steady-state high, CD/RI indicates that local telephone line available modem. steadystate low, CD/RI indicates that local telephone line available modem either because modem connected line because line already use. When ring signal present across Ring, CD/RI output toggles ring frequency. operates therefore operates even when removed from modem. /DTR active input modem. AT&D command determines modem will interpret activity /DTR. /DCD active output from modem. AT&C command controls when XE2420 asserts /DCD. /DSR active output from modem. AT&S command controls when XE2420 asserts /DSR. /CTS active output from modem. modem asserts /CTS indicate that accept data from terminal equipment /TXD. /RTS active input modem. /RTS indicates modem that host data send. /RXD provides path received data modem responses sent from modem host terminal equipment. /TXD provides path transmitted data modem commands passed from host terminal equipment modem. RESET active high input which intiates modem hardware reset. RESET must active minimum milliseconds proper modem reset sequence. external reset required; none used RESET signal should left open. provides volt power modem. Ring Detect circuit powered Vui.
/DTR /DCD /DSR /CTS /RTS /RXD /TXD RESET
XECOM
XE2420
XE2420 Electrical Specifications
Parameter
Ring Voltage Detected Ring Frequency Detected Connect Detect Sensitivity Handset Interrupt Detection Telephone Loop Current Line Impedance Data Transmit level DTMF Transmit Level -0.3 VCC+0.3 15.3 -10.5 -2.5 -9.0
4.75 4.75
5.25
Units
Volts Volts Volts Volts Ohms Volts Volts Volts Volts
Comments
5.25
Line
Ring Signal Present Type Ringer Type Ringer Battery Voltage XE2421only; Change Battery Voltage
over second interval
XECOM
XE2420
XE2420 Typical Application Schematic
Volts RJ11
XE2420
Reset /TXD /RXD /RTS /CTS /DSR /DCD /DTR CD/RI
16C550 UART
Ring
Volts
/TXD /RXD /RTS /CTS /DSR /DCD /DTR
Notes: ferrite beads which required filtering your system. Without these components experience unintended radiation when telephone cable attached your system. recommend selecting components such ACB2012L-120 which provide minimum ohms impedence frequencies above MHz.
high-voltage capacitors which required filtering your system. Without these components experience unintended radiation when telephone cable attached your system. recommend selecting components such Panasonic ECKDRS471. This pfd, 3000 volt capacitor will direct high frequency harmonics system ground. These capacitors must rated minimum 1500 volts maintain isolation required Part Rules.
XECOM
XE2420
XE2420 Commands
XE2420 uses "AT" commands configuration control. This section describes command format lists commands, Registers Result codes. XE2420 "AT" commands have operational modes; Command Mode Data Mode. Data Mode: XE2420 enters data mode after connects with remote modem issues appropriate result code. Data Mode modem sends data presented Transmit Data (/TXD) remote modem puts data from remote modem onto Received Data (/RXD). When modem exits data mode, issues CARRIER" result code. Command Mode: XE2420 enters command mode power-up, reset, lost connection, receipt escape code. command mode modem accepts commands from host transmit data. Appropriate result codes returned received data. Command Line Format Command lines issued modem follow strict format. Each command begins with prefix command line stored command buffer executed upon receipt carriage return. Until executed, command line edited with backspace key. Command Prefix Each command, except command, begins with prefix. either both upper case both lower case cannot different cases. prefix identifies speed parity commands sent modem host. Speed determined measuring width incoming bits. Parity determined comparing parity "T." Command Line Commands strung together single command line characters. Commands executed sequence they appear. Spaces inserted into command line fill space command buffer. carriage return terminates command line causes commands executed. Register allows user select character other than carriage return terminate command line. Command Buffer more than characters, including prefix, loaded into command buffer. command buffer overflows, modem issues "ERROR" result code commands executed. Command Line Editing backspace edits command line before executed. backspace key, (Control simultaneously some systems), erases previous character command line. Register allows user select character other than backspace edit command line. Re-Execute Last Command command causes modem re-execute last command line. This only command which does require "AT" prefix. Omitted Parameters Most commands include parameter which determines functions will set. When command parameter omitted from command string, assumed Escape Characters character escape sequence maybe entered while data mode switch modem into command mode while line. escape character, Register must entered times succession within second guard time execute escape. default escape sequence "+++." Result Codes modem issues result code after each action. Result codes provided full words, digit numeric codes, disabled together. Each result code ends with carriage return when numeric result codes chosen. When full word result codes chosen, Line Feed Carriage Return preceed follow each result code.
XECOM
XE2420
XE2420 Commands
asterisk indicates factory default Answer Command Select Communications Standard Selects CCITT standards Selects Bell standards* Dial Command Pulse dial Tone dial Connect answering modem Wait dial tone Pause duration Wait silence Switch hook flash Return command state Dial Stored Number Command Echo echo commands Enable command echo* Switch Hook Control Switch hook relay opens Switch hook relay closes Modem Identification Speaker Activity Speaker Speaker until carrier received* Speaker remains Speaker after dialing until carrier detected. Result Code Responses Responses Responses Responses 0-5, Responses
Operation forced active* indicates valid carrier signal ignored* When modem on-line switches command mode issues response. Modem disconnects host revokes DTR. modem performs soft reset when revoked. Revert Factory Defaults Guard Timer None Guard Timer 1800 Guard Timer Flow Control Flow Control Disabled RTS/CTS Flow Control XON/XOFF Flow Control Data Ready Data Ready Forced Active Data Ready Start Modem handshake &Zn=x Store number memory location Automatic Retrain Automatic Retrain Disabled Automatically retrain poor signal quality Data Buffering Data Bufferred Direct Mode data buffering
Line Return Line with retrain* Initiate retrain while returning line. Responses Send responses Responses Interrogate Register Sr=n Register Value Result Codes Numeric Result Codes English Word Result Codes*
XECOM
XE2420
XE2420 Modem Registers
Answer Ring: sets modem automatically answer ring. Setting disables automatic answer. Range: Units Rings Default Ring Count: read-only register showing number rings detected. ring detected within seconds, reset zero. Range: Units Rings Default Escape Character: determines ASCII escape character. Values 0-127 select valid ASCII escape characters; values from disable escape sequence. Range: Units ASCII Character Default Wait Carrier after Dialing: determines long modem waits valid carrier signal after dialing completed. Range: Units Seconds Default Comma Pause Time: defines duration pause initiated comma dialing string. pause generally used when waiting second dial tone. Range: Units Seconds Default Carrier Detect Response Time: establishes length time remote modem's carrier must present recognized valid. Range: Units Seconds Default Carrier Disconnect Delay: selects long carrier must lost before modem disconnects. Note: smaller than value modem will automatically disconnect loss carrier. Range: Units Seconds Default Tone Dialing Speed: sets duration spacing dialing tones. does affect pulse dialing rate. Range: Units Millisecond Default Escape Code Guard Timer: sets escape sequence guard timer. characters received before after escape sequence, within guard timer, modem aborts escape attempt remains data mode. Range: Units 0.02 Seconds Default
Carriage Return Character: determines ASCII character serve carriage return terminate commands modem responses. Range: Units ASCII Character Default (Carriage Return) Line Feed Character: sets ASCII character line feed character modem responses. Range: Units ASCII Character Default (Line Feed) Back Space Character: defines ASCII character used backspace edit command line. Range: Units ASCII Character Default (Back Space) Dial Tone Wait Time: determines long modem waits dial tone before dialing begins. Dial Tone Wait Time cannot less than seconds. Range: Units Seconds Default
XECOM
XE2420
XE2420 Modem Registers continued
Inactivity Timer: determines long modem remain line with data flowing. this register disables inactivity time out. Range: 0-255 Units Minutes Default Hook Flash Time: determines amount time modem will on-hook when hook switch flash called for. Range: 0-255 Units 0.02 Seconds Default Maximum Line Data Rate: sets maximum line data rate modulation technique that XE2420 will support connection. Register Value Communications Supported Maximum Data determined autobaud detect Command V.23 (1200BPS forward 75BPS back) reserved V.21, 103, Reserved V.22, Bell212A 1200 V.22bis 2400
XE2420 Modem Responses
Digits Verbose CONNECT RING CARRIER ERROR CONNECT 1200 DIAL TONE BUSY ANSWER CONNECT 2400 CONNECT 1200TX/75RX CONNECT 75TX/1200RX Description Successfully executed command line connection Ring signal detected Carrier detected/lost Error command line 1200 connection dial tone detected Busy signal detected second silence detected 2400 Connection V.23 Connection transmitting 1200 V.23 Connection transmitting
XECOM
(10)
XE2420
Instructions
XE2420 complies with part Rules Regulations. With each device shipped, there label which contains, among other information, Registration Number Ringer Equivalence Number (REN) this product. must, upon request, provide this information your telephone company. mounting this device final assembly must made such manner preserve high voltage protection between TIP/RING Connection rest system. Typically, this accomplished maintaining minimum spacing mils between TIP/RING Traces RJ-11C Jack voltage portion system. additional circuitry attached between TIP/RING telephone line connection, unless specifically allowed rules. useful determine quantity devices connect telephone line still have these devices ring when number called. most, areas, RENs devices connected line should exceed five (5.0). certain number devices connect line, determined REN, should contact local telephone company determine maximum calling area. your system causes harm telephone network, telephone company discontinue service temporarily. possible, they will notify advance. advance notification practical, will notified soon possible. Your telephone company make changes facilities, equipment, operations procedures that could affect proper functioning your equipment. they will notified advance give opportunity maintain uninterrupted telephone service. experience trouble with this device, please contact XECOM (408) 945-6640 information obtaining service repairs. telephone company disconnect this device from network until problem been corrected until sure that device malfunctioning. device used coin service lines provided telephone company (this does apply private coin telephone applications which standard telephone lines). Connection party lines subject state tariffs.
XECOM
(11)
XE2420
Terms Sale
Devices sold XECOM covered warranty provisions appearing Terms Sale only. XECOM makes warranty, express, statutory, implied, description regarding information forth herein, regarding freedom described devices from patent infringement. XECOM makes warranty merchantability fitness purposes. XECOM reserves right discontinue production change specifications prices time without notice. This product intended normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, high reliability applications, such military, medical life-support life-sustaining equipment, specifically recommended without additional processing authorization XECOM such application. Xecom assumes responsibility circuitry other than circuitry embodied Xecom product. other circuits, patents, licenses implied.
Life Support Policy
Xecom's products authorized Critical Components Life Support Devices Systems. Life Support Devices Systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. Critical Component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
Copyright, Xecom 2001 While Xecom, Inc. made every effort ensure that information presented here accurate, Xecom will liable damages arising from errors omission fact. Xecom reserves right modify specifications and/or prices without notice. Product mentioned herein used identification purposes only trademarks and/or registered trademarks their respective companies.
Xecom Incorporated Turquoise Street, Milpitas, 95035 Ph:408-945-6640 Fax:408-942-1346 E-Mail: info@xecom.com
XECOM
(12)
XE2420

World's First Complete PLCC Packaged Modem Description Xecom's XE

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