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xecom (1) XE0092 XE0092 june 2004 surface-mount daa modules for audio or data transfer description the XE0092 supplies a complete telephone line interface or daa (data access arrangement) in a compact, surface-mount module. it offers an alternative to a discrete daa for a multitude of voice, audio, dtmf, fax and data applications. the XE0092 replaces 25 to 30 discrete components with a single, fully-assembled and fully-tested unit. the XE0092 does not sacrifice performance for small size and surface-mount convenience. the wide bandwidth, low distortion design provides sufficient bandwidth for a 56k bps analog modem. like all xecom daa's the XE0092 is a complete daa. it includes a 2-4 wire converter, loop current holding circuit, hook switch and ring indicator. it also supports caller id. the XE0092 complies with fcc part 68 rules for direct connection to the telephone line. two versions of the XE0092 are available; the XE0092 with gull-wing leads and the XE0092lcc with a leadless chip carrier attachment. both versions offer the same outstanding performance. features * low-profile, surface-mount package: XE0092: 1.20? by 1.00? by 0.30? XE0092lcc: 1.20? by 1.00? by 0.15? * meets line interface requirements for reliable v.90 and v.92 communications; * typical second harmonic distortion of -80 db; * part 68 compliant; * integrated 2-to-4 wire converter provides 40 db transhybrid loss * supports detection of incoming caller id signals; * integrated ring detection, * low power operation: just 10 millamps from a single + 3.3 volt power supply; * solid-state hook switch control; XE0092 block diagram line line monitor monitor tip ring hook hook - - switch switch loop loop current current holding holding circuit circuit network network isolation isolation /oh tx - tx+ rx - rx+ /cid /ri 2 2 - - to to - - 4 4 wire wire con con - - vertor vertor
xecom (2) XE0092 XE0092 mechanical specifications XE0092 a b d e f g h h c i j j k e dim inches mm description a 1.00 25.40 product length b 1.20 30.48 product width c 0.30 7.62 product height at tallest component d 0.80 20.32 pin row length pin 1 to pin 9 e 0.10 2.54 distance from pin 1 or pin 9 to edge of the product pcb f 0.50 12.70 distance from pin 11 to edge of the product pcb g 0.40 10.16 distance from pin 10 to edge of the product pcb h 0.10 2.54 distance between adjacent pins i 0.05 1.27 total height of the interface pin j 0.05 1.27 distance the interface pin extends beyond the product pcb k 1.30 33.02 total distance across product including interface pins note: all interface pins are 0.25 inch square, gold plated
xecom (3) XE0092 XE0092lcc mechanical specifications XE0092lcc (bottom view) a b d e i j h h c g f dim inches mm description a 1.000 25.40 product length b 1.200 30.48 product width c 0.150 3.81 product height at tallest component d 0.800 20.32 pin row length pin 1 to pin 9 e 0.050 1.27 distance from pin 1 or pin 9 to edge of the product pcb f 0.075 1.90 distance from pin 11 to edge of the product pcb g 0.100 2.54 distance from pin 10 to edge of the product pcb h 0.100 2.54 distance between adjacent pins i 0.500 12.70 total height of the interface pin j 0.400 10.16 distance the interface pin extends beyond the product pcb
xecom (4) XE0092 XE0092 pcb layout recomendations a b c c d e f dimension typical (inches) description a 0.100 pad length b 0.060 pad width c 0.100 adjacent pad-to-pad spacing d 0.800 pin 1 to pin 9 spacing e 0.300 pin 9 to pin 10 spacing f 1.200 row-to-row spacing note: no components or traces should be placed under the daa module if the leadless version of the XE0092, the XE0092lcc, is to be used. the pcb recommendedations shown below apply to either the XE0092 or XE0092lcc.
xecom (5) XE0092 XE0092 p in configuration pin name description 1 vcc +3.3 or 5 volt power source for the XE0092. vcc powers the /ri and /oh control lines. 2 tx- tx- is the negative half of the differential transmit data input to the XE0092 from the host system. if the host system uses a single ended transmit data output, that output should be connected to tx- and tx+ should be grounded. 3 tx+ tx+ is the positive half of the differential transmit data input to the XE0092 from the host system. if the host system uses a single ended transmit data output, that output should be connected to tx- and tx+ should be grounded. 4 /oh switch-hook control to the modem. /oh is an active low input. activating oh closes the switch-hook causing the XE0092 to seize the local telephone line. the telephone line connection is dropped when oh is deactivated. the host can pulse oh to simulate rotary dialing. the pulse rate in the us is ten pulses per second. each digit is dialed as a series of pulses created by closure of the hook-switch, one pulse for the digit one to ten pulses for the digit zero. the pulses must be asymmetrical so that the hook-switch is closed for thirty-one milliseconds and open for sixty-nine milliseconds. an inter-digit delay of at least one hundred milliseconds is required. 5 /ri ring indicate output from the module. /ri is active low. ri goes low for the duration of each incoming ring, returning high between rings. the XE0092 recognizes ring voltages of twenty-eight to one hundred fifty volts rms in the frequency range of sixteen to sixty-eight hertz. 6 /cid /cid is an active low input to the XE0092. the host drives /cid low after the first ring to permit the caller id signal to be presented on the rx outputs. the telephone network normally sends caller id information on incoming calls between the first and second ring. 7 rx- rx- is the negative half of the differential received data output from the XE0092. if the host system uses a single ended received data input, that input should be connected to rx+ and rx- should remain open. XE0092 p in descriptions vcc 1 tx- 2 tx+ 3 /oh 4 /ri 5 11 tip /cid 6 10 ring rx- 7 rx+ 8 gnd 9
xecom (6) XE0092 typical connections diagram for north america and japan pin name description 8 rx+ rx+ is the positive half of the differential received data output from the to the host system. if the host system uses a single ended received data input, that input should be connected to rx+ and rx- should remain open. 9 gnd ground connection to the XE0092. this signal provides the reference for the /oh input and /ri output. this pin should be connected to the systems digital ground. 10 ring ring is one wire of the two-wire telephone line connection (rj11 pin 4). fcc part 68 rules require a 1500 volt isolation barrier between the telephone line and all other circuits. this isolation must be preserved throughout the system. xecom recommends 0.100 inch spacing between traces connected to ring and all other conductors to preserve this isolation 11 tip tip is one wire of the two-wire telephone line connection (rj11 pin 3). the telephone company places a dc "battery" voltage across tip and ring on all public switched telephone lines. the XE0092 accept this line battery voltage without regard to its polarity. XE0092 p in descriptions component description c1, c2 470 pfd, minimum 1500 volts; these capacitors may be required for emi filtering to prevent unintended radiation when the telephone cable is attached to your system. these capacitors must be rated at a minimum of 1500 volts to maintain the isolation required by fcc part 68 rules. fb1., fb2 fb1 and fb2 are ferrite beads which may be required for emi filtering to prevent unintended radiation when the telephone cable is attached to your system. xecom recommends the tdk acb2012l-120 which provides more than 100 ohms impedance at frequencies above 100 mhz. mov1 mov1 protects against damage from lightening strikes on the telephone lines. xecom recommends the teccor p3100ba sidactor to provide this protection. f1, f2 f1 and f2 prevent damage to the system when a power line crosses with the telephone line. xecom recommends the raychem tr600-150 for this function. the tr600-150 is a ptc devices which automatically resets after use. rj11 fb1 fb2 c1 c2 f1 f2 1 vcc 2 tx - 3 tx+ 4 /oh 5 /ri tip 11 6 /cid ring 10 7 rx - 8 rx 9 gnd mov1 XE0092 txa1 txa2 ohrly /ring /int rx - rx+ host system with differential data signals vcc
xecom (7) XE0092 XE0092 soldering instructions because of its hybrid construction, the XE0092 daa is subject to damage if over-exposed to heat during solder reflow operations. following the soldering instructions below will ensure that the process of soldering the module to the board does not damage the daa. maximum temperature 220 o c maximum time at 220 o c 20 seconds maximum time above eutectic (180 o c) 90 seconds maximum preheat dwell time 180 seconds maximum recommended solder temperature profile 220 o c 180 o c 150 o c -20 sec- ------------------------------180 sec max------------------------- max ----- 90 sec max ----- notes: xecom?s XE0092 daa modules should be exposed to no more than one reflow cycle.
xecom (8) XE0092 XE0092 applications notes dialing: the public switched telephone network permits tone and rotary (pulse) dialing. the XE0092 supports both types. tone dialing requires an external signal source to generate the dialing tones. the /oh line on the XE0092 may be pulsed to create pulse dialing. pulse dialing: the XE0092 generates dialing pulses through momentary closures of the switch-hook. each digit is represented as a series of pulses, one pulse for a one to ten pulses for a zero. the pulse rate in north america is ten pulses per second. the dialing pulses are asymmetrical. the correct duty cycle in north america is 31 milliseconds on and 69 milliseconds off. an inter-digit delay of at least one hundred milliseconds separates the digits. tone dialing: to permit tone dialing the XE0092 seizes the line, /oh active. for each digit a unique dtmf, dual tone multiple frequency, tone pair is applied to tx+ and tx-. the higher frequency tone is always larger than the lower frequency one. transmit the tones for a minimum of 70 milliseconds, and leave a minimum of 70 milliseconds be- tween digits. the following chart shows the correct dtmf signal frequen- cies for each digit. digit lower tone upper tone 1 697 1209 2 697 1336 3 697 1477 4 770 1209 5 770 1336 6 770 1477 7 852 1209 8 852 1336 9 852 1477 0 941 1336 * 941 1209 # 941 1477 signal levels: fcc part 68 rules set the allowable signal level in the us for all signals placed on the telephone line other than live voice. other countries have similar regulations. signal levels are measured in dbm. zero dbm is 1 milliwatt through a 600 ohm load. distortion: distor tion is the most common measure of the quality of the signal path provided by the daa. the primary sources of this distortion is the line current holding circuit, although board layout and other factors can introduce distortion. distortion varies with frequency. the voice band of the telephone line is limited to less than 4000 hz. high speed modems such as 33.6k bps and 56k bps require virtually all of this bandwidth for signal transmission. even if the distortion through a device is good in the center portion of the spectrum, signal quality is compromised if distortion greatly increases at the outer limits of the voice band. the XE0092 provides a low distortion signal path across the entire voice band. caller id reporting: the telephone network normally sends the caller id signal between the first and second ring signals. if the user activates the /cid input while the XE0092 is off-hook, the caller id signal is passed through to the host through the rx pins on the XE0092. if the XE0092 is off-hook, /oh low, caller id pass- through cannot be enabled regardless of the state of /cid.
xecom (9) XE0092 electrical specifications power supply voltage 3.0 5.50 volts power supply current off-hook 10 ma on-hook 0.5 ma transhybrid loss 600 ohm impedance, 1800 hz 40 db transmit insertion loss 600 ohm impedance, 1800 hz -0.2 0 0.2 db receive insertion loss 600 ohm impedance, 1800 hz -0.2 0 0.2 db line impedance off-hook 600 ohms second harmonic distortion 600 ohm impedance, 200 to 4000 hz -80 db ring detect sensitivity min. ac voltage between tip & 28 150 vrms ring type b ringer ring frequencies detected 15 68 hz ri output voltage ring present, active low 0.4 volts no ring signal , active high vcc - .4 volts hook-switch control on: (off-hook) 0.2 0.5 volts voltage (active low) off: (on-hook) 2.0 3.0 volts hook-switch control on: (on-hook) 0.8 2.0 volts hook-switch control low: (off-hook) -120 microamps current high: (on-hook) -120 microamps loop current off-hook current draw from 10 100 ma telephone line dc on-hook impedance hook-switch open 10 mohms parameter conditions min typ max units XE0092 absolute maximum ratings storage temperature -40 o c to +125 o c operating temperature range * 0 o c to +85 o c * the XE0092 can be ordered with an operating temperature of -40 o c to +85 o c at extra cost. order model number XE0092-itr
xecom (10) XE0092 XE0092 fcc part 68 information when developing a product to be connected to the telephone line, it is necessary to use a circuit known as a data access arrangement (daa) approved by the appropriate governmental agency. in the us this agency is the federal communications commission (fcc), while in canada it is industry canada (ic). these agencies test and approve the product to ensure that it meets their specifications, thereby protecting the telephone system from damage and protecting the user from high voltage transients (such as lightning strikes) which may come down the telephone line. the XE0092 has been designed to meet all fcc part 68 requirements for hazardous voltage, line impedance and leakage current. if the system transmits data, synthesized voice, or dtmf tones on the telephone line, the user must certify that the signals transmitted meet basic fcc requirements for maximum transmission levels, out of band energy and billing delay. full details may be obtained from the fcc under part 68 of the fcc rules and regulations, or in title 47 of the code of federal regulations, however the basic requirements are as follows: 1. maximum transmit level for the normal ?permissive? (standard) telephone line, equipment which transmits data (such as a modem) must not exceed a transmission level of -9 dbm. 2. out of band energy data equipment must not transmit ?out of band? energy on the telephone line which exceeds the following limits: frequency range max. power 3995 hz to 4005 hz -27 dbm 4005 hz to 12 khz -20 dbm 12 khz to 90 khz -55 dbm 90 khz to 270 khz -55 dbm 270 khz to 6 mhz -15 dbm 3. dtmf transmission level if the system is capable of dtmf dialing, the maximum dtmf transmission level must be less than 0 dbm averaged over a 3 second interval. 4. billing delay a delay of 2 seconds or greater is required after the time the XE0092 is taken ?off hook? and before any information is transmitted. this is required to ensure that billing information may be exchanged between telephone company central offices without interference. the user of the XE0092 must certify to the fcc that the final system meets the requirements of part 68 which include the criteria above as well as the high voltage protection provided by the XE0092. this is generally accomplished through an independent testing lab which tests the system and submits the proper paperwork to the fcc for approval. since the XE0092 already complies with fcc part 68 rules, this is a relatively simple process.
xecom (11) XE0092 copyright, xecom ? 2004 while xecom, inc. has made every effort to ensure that the information presented here is accurate, xecom will not be liable for any damages arising from errors or omission of fact. xecom reserves the right to modify specifications and/or prices without notice. product mentioned herein are used for identification purposes only and may be trade- marks and/or registered trademarks of their respective companies. xecom inc o r p o r a t e d 3 74 t u r quoise s t re e t, m il p itas, c a 9 5035 p h : 4 0 8 - 9 42-2200 fa x : 40 8- 9 42-13 4 6 email: info@xecom.com web site: http://www.xecom.com terms of sale devices sold by xecom are covered by the warranty provisions appearing in its terms of sale only. xecom makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or re- garding the freedom of the described devices from patent infringement. xecom makes no warranty of merchant- ability or fitness for any purposes. xecom reserves the right to discontinue production and change specifications and prices at any time and without notice. this product is intended for use in normal commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applica- tions, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing and authorization by xecom for such application. xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a xecom product. no other circuits, patents, or licenses are implied. life support policy xecom's products are not authorized for use as critical components in life support devices or systems. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions pro- vided in the labeling, can be reasonably expected to result in significant injury to the user. a critical component is any component of a life support device or system whose failure to perform can be rea- sonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness.

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