xecom (1) xe0071 xe0071 05/99 very-low profile v.34 compatible telephone line interface description xecom's xe0071, slim-link daa, is a miniature, high- performance telephone interface module for applications with extreme space restrictions. the xe0071 meets fcc part 68 rules for direct connection to the public telephone network and supports v.34 data transfer. xecom offers the xe0071 in two pin configurations. the XE0071T pins extend perpendicularly for through- hole insertion. the xe0071l pins extended laterally so that the daa can be surface mounted into a cutout in the host printed circuit board. both xe0071 models provide a complete telephone line interface including the line transformer, ring detect circuit and switch hook control. slim-link supplies a minimum of 1500 volts isolation from the telephone line. the xe0071 operates from a single power supply of either +5 volts or +3.3 volts for low power applications. features * miniature size: 0.75" long 0.75" wide 0.159" thin (maximum); * v.34 compatible for data transfer at 33,600 bps; * fcc part 68 compliant; * low total harmonic distortion; * ring detection; * 3.3 volt or 5 volt operation * integral hookswitch * 2 available pin styles xe0071l - pins extend laterally for mounting within pcb cutout XE0071T - through-hole pins oh ri ring tip t1 t2 line transformer loop current shunt hook- switch ring detect xe0071 block diagram
xecom (2) xe0071 1 (top view) 9 2 38 4 57 6 gnd t2 oh t1 /ri vcc tip ring n/c xe0071 pin configuration xe0071 pin descriptions pin name description 1 gnd this signal acts as common reference for all control signals. signals on t1 and t2 are not referenced to ground. 2 t2 t2 connects directly to the secondary side of the telephone line transformer. 3 oh hook-switch relay control. a high on oh closes the internal relay and connects the equipment to the tele- phone line. 4 t1 t1 connects directly to the secondary side of the telephone line transformer. 5 /ri ring indicate, output, active low, ttl, /ri provides a half-wave representation of the ring as it appears on the telephone line. 6 vcc vcc provides the power source for the hook-switch control. the xe0071 operates with either 3.3 volt or 5 volt power. 7 n/c no connect 8 ring ring (rj11 pin 4), one of two signals which form the telephone network connection. this device is not sensitive to the polarity of the telephone line's battery voltage. ring has 1500 volts isolation from the rest of the circuitry. this isolation must be preserved throughout the system. 9 tip tip (rj11 pin 3) provides the second connection to the telephone network . tip has 1500 volts isolation from the rest of the circuitry. this isolation must be preserved throughout the system. note: xecom placed the telephone and control leads on opposite sides of the device to assist the user in maintaining the neces- sary isolation between the telephone network and the user equipment. fcc part 68 rules require 1500 volts isolation between the telephone line and all other circuits.
xecom (3) xe0071 pcmcia circuit board a b c d e g f h j i k pin 1 f l f xe0071l mechanical specifications inches millimeters dim description min max min max a module width 0.745 0.755 18.92 19.18 b top of module to underside of pin 0.084 0.094 2.13 2.39 c underside of pin to bottom of module 0.065 0.075 1.65 1.91 d module height at thickest point 0.149 0.159 3.78 4.04 e module length 0.745 0.755 18.92 19.18 f end of pin row to module edge 0.120 0.130 3.05 3.30 g pin 7 to module edge 0.220 0.230 5.59 5.84 h pin spacing (control side, center to center) 0.095 0.105 2.41 2.67 i pin spacing (telco side, center to center) 0.195 0.205 4.95 5.21 j pin row length (control side) 0.495 0.505 12.57 12.83 k pin row length (telco side) 0.395 0.405 10.03 10.29 l pin length 0.045 0.055 1.14 1.40 notes: dimension d is not uniform. this drawing shows the module's maximum envelope. pins are 0.010 inches by 0.020 inches, tin plated.
xecom (4) xe0071 XE0071T mechanical specifications a b c d e g f h j i pin 1 f f inches millimeters dim description min max min max a module width 0.745 0.755 18.92 19.18 b module height at thickest point 0.149 0.159 3.78 4.04 c pin length 0.125 0.200 3.18 5.08 d pin row length (telco side) 0.395 0.405 10.03 10.29 e module length 0.745 0.755 18.92 19.18 f end of pin row to module edge 0.120 0.130 3.05 3.30 g pin 7 to module edge 0.220 0.230 5.59 5.84 h pin spacing (control side, center to center) 0.095 0.105 2.41 2.67 i pin spacing (telco side, center to center) 0.195 0.205 4.95 5.21 j pin row length (control side) 0.495 0.505 12.57 12.83 notes: dimension d is not uniform. this drawing shows the module's maximum envelope. pins are 0.010 inches by 0.020 inches, tin plated.
xecom (5) xe0071 xe0071 electrical specifications (ta = 0 to 70 degrees c) parameter conditions min typ max units power supply current off hook, 5.0 volts 10 15 ma off hook, 3.3 volts 6.5 10 ma transmit insertion loss 600 ohm impedence, 1000 hz 1.7 2.7 3.7 db receive insertion loss 600 ohm impedance, 1000 hz 1.7 2.7 3.7 db line impedance at 1000 hz, rm 340 ohms 540 600 660 ohms coupler matching impedance input impedance to t1 & t2 320 340 360 ohms ring detect sensitivity min. ac voltage between tip & 38 150 vrms ring type b ringer (on-hook) ring detect peak current ringing voltage of 40 vrms 100 ua ring detect idle current no ringing voltage present 10 ua ring indicate output ring voltage present 0.2 0.5 volts hook switch control voltage on: (off-hook), vcc = 5 volts 2.0 3.0 volts off: (on-hook) 0.2 0.5 volts hook switch control current vcc = 5 volts 15 25 ma 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 (soldering 2 seconds per wave) 260 o c
xecom (6) xe0071 xe0071 typical connection diagram recommended parts designation description c1, c2 470 picofarad, 3000 volts (sprague part number 30ga-t47) fb1, fb2 ferrite beads (tdk part number cb30-453215b) mov1 typical breakover 310 volts (teccor part number p3100ba70) r1, r2 resistor 10 ohms, 1/2 watt conexant rc336acf ohrly txa2 rin vc txa1 ringd 1 gnd ring 9 2t2 3oh tip 8 4t1 5 /ri nc 7 6 vcc xecom xe0071 rj11 +5 volts 2 k 10 k 27 k mov1 fb1 fb2 c1 c2 4 3 340 ohms r1 r2
xecom (7) xe0071 fcc part 68 instructions 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 xe0071 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 xe0071 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 xe0071 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 xe0071. 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 xe0071 already complies with fcc part 68 rules, this is a relatively simple process.
xecom (8) xe0071 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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