External Components Q-SMINT Applications Sourcing Lists Interface

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External Components Q-SMINT Applications Sourcing Lists Interface

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DS1, 2001-09-12 2B1Q Second Generation Modular ISDN Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913 Version
External Components Q-SMINT Applications
Sourcing Lists Interface Transformers
Table Table contain information pertaining interface transformers suitable with Q-SMINT transceiver family. These transformers recommended their manufacturers. quality transformers rated Infineon. manufacturer device recommended over another. This list does claim complete. contains examples devices offered various manufacturers. manufacturers their products listed these tables. Most manufacturers offer variety components with different parameters. most recent information, please contact manufacturers directly. Table U-Transformer Information Part Number B78311-P1585-A5 B78386-P1580-A5 B78421-P1582-A5 Vacuumschmelze www.vaccorp.com T60403-M6298X030 T60403-M6296X032 T60403-M6394X009 Vogt www.vogtelectronic.com Characteristics EF20, PTH, RM6, PTH, EP13, PTH, RM8, PTH, RM6, PTH, EP13, PTH, RM6, PTH, reinforced isolation referred EN60950 Comments project W989 project X471 project X446 Manufacturer EPCOS www.epcos.com
Revision History: Major Changes:
Previous Version: None none
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Table S-Transformer Information Part Number B78384-A1060-A3 B78384-A1111-A5 B78510-A1223-A3 B78510-P1365-A5 Vacuumschmelze www.vaccorp.com T60403-L4025X021 T60403-L4097X011 T60407-L5051X006 Vogt www.vogtelectronic.com Characteristics RM5, RM5, R10, R10, K10, SO16, module: transfr. SO16, module: transfr. 4-fold choke: x=1: 4x500 x=2: x=5: 4x50 x=6: 4x100 reinforced isolation module: transfr. reinforced isolation module: transfr. 4-fold choke Comments project V373 project V373 project V568 project
Manufacturer EPCOS www.epcos.com
Pulse www.pulse.com
PE-64995 PE-68995 PE-65795
Sourcing Information Crystals
Table identifies some manufacturers crystals suitable with Q-SMINT transceiver family. crystals recommended manufacturers. quality crystals rated Infineon. manufacturer recommended over another. This list does claim complete. most recent information, please contact manufacturers directly. Table Crystal Manufacturers Internet Contact www.ofc.com www.ndk.com www.saromix
2001-09-12
Manufacturer Corning Frequency Control Inc. Nihon Dempa Kogyo Co., Ltd. (NDK) SaRomix
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Table Crystal Manufacturers (cont'd) Internet Contact www.telequarz.de www.viteonline.com
Manufacturer Telequarz GmbH Vectron International Technology Express (VITE)
Protection Circuitry U-Interface
dimension protection circuitry U-Interface depends maximum permissible input current these pins: AOUT, BOUT, AIN, BIN. This current derived from values table "Maximum Input Currents" section "Absolute Maximum Ratings" Q-SMINT Data Sheet (see "Table Contents" corresponding data sheet). interpolated graph shown Figure
maximum input current
pulse width
Figure
Maximum Input Current pins Q-SMINT
protection circuitry consists several levels: primary protection various secondary protections. Depending conditions, resistor divided into with different values. this case, secondary protection placed between them. general structure protection circuitry shown Figure
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications
AOUT
RCOMP RPTC
RCOMP
RPTC
optional secondary protection
primary protection
BOUT
secondary
protection
Figure
Structure Protection Circuitry
input current pins critical because high resistance input current pins AOUT BOUT depends secondary protection. Calculation this input current requires voltage point (VP). Voltage point Diode conductive: forward voltage (provided that same diodes used) Diode conductive: common mode DC-level pins AOUT BOUT typically 1.65 (VDCOUT VCC/2). This stated Q-SMINT Data Sheet table "U-Transceiver Characteristics" section Characteristics". input current (IIN) pins AOUT BOUT VDCOUT)/RT1: Diode conductive: (VCC/2 VF)/RT1 Diode conductive: (VCC/2 VF)/RT
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications primary protection consists overcurrent protection (fuses PTCs) overvoltage protection. overvoltage protection should prevent voltages higher than working voltage U-Interface. remote U-feeding active, working voltage primary protection, arrestor-such T83-A230X from EPCOS, formerly S&M-or integrated bidirectional tribalanced protection-such TISP series from Power Innovations SMT/TPI series from SGS-Thomson-can used. bidirectional protection should applied ground side floating. ground refers absolute ground, tribalanced protection should used. clamping voltage transformed side. maximum current through diodes calculated (VC/2 (RT2 RCOMP). This current must exceed maximum peak forward current diodes. this case, optional secondary protection with smaller clamping voltage must used. Example following components used protection: Secondary protection: LL4151 Primary protection: arrestor T83-A230X This example assumes that high voltage pulses with duration occur. Under this condition, maximum permissible input current pins AOUT BOUT about maximum permissible peak forward current diodes about With these values, calculated Ohms. RCOMP Ohms selected. Therefore, maximum input current about maximum peak forward current through diodes calculated Because this, optional secondary protection necessary. transient voltage suppressor LC03-6 from SEMTECH applied that maximum clamping voltage Under this condition, maximum peak forward current
Calculate U-Hybrid Q-SMINT
calculation Q-SMINT U-hybrid, three conditions should met. impedance visible from line side should Ohms. signal pins AIN/BIN should high possible without clipping Analog-to-Digital Converter (ADC). echo transmit signal sent from pins AOUT/BOUT should small possible input pins AIN/BIN.
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Condition corresponding impedance calculated 2RPTC RCU;L n2(RCU;IC 2RCOMP ROUT)= Ohms. RCU;L resistance transformer windings line side RCU;IC resistance transformer windings device side transformation ratio (for Q-SMINT ROUT resistance between pins AOUT BOUT, typ. Ohms. Condition Figure should considered calculating signal level between pins BIN.
RL/(2n2)
AOUT/BOUT
Figure Calculation VAIN;BIN
RL/(2n2)
output impedance between AOUT BOUT nearly Ohms. Therefore, figure calculation simplified this way. resistor includes several other resistors: RCOMP RCU;IC RCU;L/n2 RPTC/n2. Resistors line-side transformed IC-side under consideration transformation ratio
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications voltage calculated RT/(RT RL/(2n2)) because usually much larger than voltage between (VA;B) voltage U-Interface divided result VAIN;BIN shown following equation:
;BIN
average impedance kinds U-lines specified ETSI ANSI standards. maximum power spectral density (PSD) U2B1Q signal about KHz. impedance plot long lines (see ETSI standard 080, Chapter C.2.2) shows impedance Ohms. lowest impedance ETSI loops with Ohms. maximum input level, lowest impedance relevant. maximum loop performance, impedance longest line important. maximum allowable value VAIN;BIN without clipping about (peak-to-peak). worst case, line impedance very small Ohms) voltage U-Interface very high (VU-int.;max echo signal receive signal maximum value VA;B (VU-int.;max 5%)/2 5%)/2 5.25
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Condition Consider Figure determining condition smallest echo AIN, BIN.
AOUT
RL/n2
BOUT
Figure
Minimizing Echo AIN,
Only voltage derived from voltage between AOUT, BOUT considered voltage between AIN, BIN. dashed line Figure line with same electrical potential, ratio U4/U3 equal UC/UT. that condition, voltage VAIN;BIN This also following equation valid:
line impedance most critical loop selected RL-for example, line impedance maximum loop length (about Ohms).
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Example following resistors recommended Q-SMINT data sheet:
Equation [1], Equation Equation applied: Equation [1]:
Equation [2]:
;BIN 803V
Equation [3]:
2001-09-12
Q-SMINT®(O, 80912, 82912, 81912, 80913, 82913, 81913
External Components Q-SMINT Applications Example this example, resistors RCOMP RPTC omitted. this condition, resistor 3.75 With Equation [1], value calculated:
Equation used calculate value provided that
-240
With these values, condition Equation should also met:
;BIN
voltage between pins high will clip voltage peaks. This should problem with short loop lengths which this calculation performed. long loops Ohms), voltage VAIN;BIN 0.93 well enough below maximum level
2001-09-12

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