xecom (1) xe0052 xe0052s &xe0052t 5/99 slim v.34 telephone line interface with 2/4 wire hybrid description the xe0052s and xe0052t are compact telephone in- terface modules which support v.34 communications at data rates to 33,600 bps yet are just 0.31 inches thick and comply with fcc part 68 rules for connection to the public telephone network. the xe0052s and xe0052t are complete daas. they include the 2-4 wire convertor to separate trans- mit and receive signals, ring detection, and the switch hook to control line access. the two models differ only in their ri outputs. the xe0052s has an integrated ri output which remains low for the duration of the ring. the xe0052t ri output is not integrated and provides a pulse train at twice the ring frequency. xecom offers two mechanical variations for each of the xe0052s and xe0052t. the xe0052s1/t1 mount vertically to consume minimal board space. the XE0052S2/t2 mount horizontally to maintain a low profile. both versions are electrically identical and share the same pin configuration. features * small size: just 1.5" by 0.5" by 0.32"; * fcc part 68 compliant; * internal 2-4 wire convertor separates transmit and receive signals * two ring detect options; xe0052s1/s2: - continuous low level xe0052t1/t2 - ring signal pulses * single +5v operation; * hookswitch control * compatible with v.34 data transfer * two mechanical variations xe0052s1/t1 - vertical mount XE0052S2/t2 - horizontal mount surge and protective network line current circuit oh ri ring detect circuit ring tip 2 to 4 wire converter hook- switch control tx rx xe0052 block diagram
xecom (2) xe0052 xe0052s1 and xe0052t1 mechanical specifications vertical package inches millimeters dim min max min max a 0.300 0.320 7.62 8.13 b 0.490 0.510 12.45 12.95 c 1.490 1.510 37.85 38.35 d 0.040 0.060 1.02 1.52 e 1.390 1.410 35.31 35.81 f 0.090 0.110 2.29 2.79 g 0.790 0.810 20.07 20.57 h 0.125 0.200 3.18 5.08 b c d e f g h a f pin 1 pin 1
xecom (3) xe0052 XE0052S2 and xe0052t2 mechanical specifications horizontal package b c d e f g h a f i pin 1 pin 1 inches millimeters dim min max min max a 0.490 0.510 12.45 12.95 b 0.320 0.330 8.13 8.38 c 1.490 1.510 37.85 38.35 d 0.040 0.060 1.02 1.52 e 1.390 1.410 35.31 35.81 f 0.090 0.110 2.29 2.79 g 0.790 0.810 20.07 20.57 h 0.125 0.200 3.18 5.08 i 0.440 0.450 11.18 11.43 xe0052 pin configuration (top view) 87654 3 21 ooooo o oo /ri rx vcc gnd tx oh tip ring
xecom (4) xe0052 xe0052 pin descriptions 1 ring --- ring connection to the phone line (rj11 pin 4). the ring pin has 1500 volts isolation from the rest of the circuitry. this isolation must be preserved throughout the system. 2 tip --- tip connection to the phone line (rj11 pin 3). the tip pin has 1500 volts isolation from the rest of the circuitry. this isolation must be preserved throughout the system. 3 oh i hookswitch relay control. a high on oh closes the internal relay and connects the equipment to the telephone line. 4 tx i tx provides the analog input signal to the 2-4 wire convertor of the xe0052s. tx uses a 2.5 volt reference signal and therefore must be capacitively coupled to the host equipment. 5 gnd -- ground 6 vcc --- +5 volts supply power 7 rx o rx provides the analog output signal from the 2-4 wire converter of the xe0052s. rx uses a 2.5 volt reference signal and therefore must be capacitively coupled to the host equipment. 8 /ri o ring indicate, output, active low, ttl. on the xe0052s a low on /ri indicates the modem is receiving a ring signal. the xe0052t provides a pulse string at twice the ring frequency when a ring is detected. pin name i/o description xe0052 absolute maximum ratings storage temperature -25 o c to +85 o c operating temperature range 0 o c to +70 o c maximum lead temperature 260 o c (soldering 2 seconds per wave)
xecom (5) xe0052 xe0052 electrical specifications (vcc = 5v + 10%, ta = 0 to 70c) power supply current ring indicate active 10 15 ma transmit insertion loss 600 ohm impedence, 1000 hz 0 db receive insertion loss 600 ohm impedance, 1000 hz 0 db line impedance at 1000 hz 540 600 660 ohms transhybrid loss attenuation between transmiter input and 10 18 db receiver output at 1khz with 600 ohm line termination ring detect sensitivity min. ac voltage between tip & ring 38 vrms type b ringer ring detect peak current ringing voltage of 40 vrms applied 100 ua between tip & ring ring detect idle current no ringing voltage present 10 ua ring indicate output ring voltage present on tip and ring 0.2 0.5 volts loop current switch on: (off-hook) 2.0 3.0 volts control voltage off: (on-hook) 0.2 0.5 volts loop current switch off-hook 0.5 ma control current parameter conditions min typ max units xe0052 typical connection diagram modem analog front end xe0052s or xe0052t rj11 4 3 /ring receive transmit ohrly +5 volts 10 ohms, 1/2 w 470 pfd 3000 volts 470 pfd 3000 volts ferritebead 10 m fd 10 m fd ferritebead teccor p3100sb 10 ohms, 1/2 w /ri rx vcc gnd tx oh tip ring 876543 2 1
xecom (6) xe0052 when developing a product to be connected to the telephone line, it is necessary to use a circuit described as a data access arrangement (daa) which is approved by the appropriate governmental agency. in the us, for example, this agency is the federal communications commission (fcc), while in canada it is the department of communications (doc). 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 xe0052 has been designed to meet all fcc part 68 requirements for hazardous voltage, surge protection and leakage current. if the system developed transmits data, 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 fro m 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 200hz to 3990hz -9 dbm 3990hz to 4005hz -27 dbm 4005hz to 16khz -16 dbm 8khz to 94khz -47 dbm 86khz to 270khz -46 dbm 270khz to 6mhz -6 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 xe0052 is taken off hook and before any information is transmi tted. this is required to ensure that billing information may be exchanged between telephone company central offices without interference. the user of the xe0052 must certify to the fcc that the final system meets the requirements of part 68 which include the criter ia above as well as the high voltage protection provided by the xe0052. this is generally accomplished through an independent testing lab which tesst the system and submits the proper paperwork to the fcc for approval. since the xe0052 already complies with fcc part 68 rules, this is a relatively simple proces s. xe0052 fcc instructions
xecom (7) xe0052 copyright, xecom ? 1999 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 incorporated 374 turquoise street, milpitas, ca 95035 ph:408-945-6640 fax:408-942-1346 email: info@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 regarding the freedom of the described devices from patent infringement. xecom makes no warranty of merchantability 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 applications, 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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