U4091BM TEMIC Semiconductors, U4091BM Datasheet
U4091BM
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U4091BM Summary of contents
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... Ordering Information Extended Type Number U4091BM-AFN U4091BM-AFNG3 Rev. A1, 02-Jun-98 adaptation to the line. The U4091BM can also be supplied via an external power supply. An integrated voice switch with loudspeaker amplifier enables hands-free or loudhearing operation. With an anti-feedback function, ear-protection acoustical feedback during loudhearing can be reduced significantly ...
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TXACL 5 STBAL 4 3 MICRO AGARX V MIC Offset canceler 40 AGCO AMPB LRX Switch matrix AGC AGCI AMREC EPO RXLS SACL ...
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... IMPSW Switch for aditional line impedance 39 MICO Microphone preamplifier output 40 AMPB Input for playback signal of answering machine 41 AMREC Output for recording signal of answering machine 42 STO Output for connecting the sidetone network 43 STC Input for sidetone network 44 STRC Input for sidetone network Target Specification U4091BM Function 3 (29) ...
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... VB is charged by the on-chip ringing power converter. In this mode, only one regulator is used to supply VMP with INLDR maximum 3 mA. Supply Structure of the Chip TLDR A main benefit of the U4091BM is the easy implementa- CT tion of various applications due to the flexible system structure of the chip. BNMT Possible applications: ...
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... DTMF/Melody generator answering machine, the chip is powered by an external supply via Pin VB. The answering machine connections can be directly put to U4091BM. The answering machine is connected to the Pin AMREC. For the output AMREC, an AGC function is select- able via the serial bus. The output of the answering ...
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... The U4091BM drives the data line. The fast read cycle is indicated by a strobe signal. With the following two clocks the U4091BM reads out the sta- tus bits RFDO and LIDET which indicate that a ringing signal or a line signal is present (see figures 4, 5 and 6). ...
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... Figure 4. Write cycle Normal read cycle R/W Strobe Data from U4091B from P Figure 5. Normal read cycle Fast read cycle D7=IZC D6=IVE Strobe Data from U4091B 14576 from P Figure 6. Fast read cycle Target Specification U4091BM A0 R/W=0 Strobe from P 14574 14575 7 (29) ...
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... U4091BM Table 1. Names and functions of the serial bus registers Register Group No R0 Enables R0B0 R0B1 R0B2 R0B3 R0B4 R0B5 R0B6 R0B7 R1 Enables R1B0 R1B1 R1B2 R1B3 R1B4 R1B5 R1B6 R1B7 R2 Matrix R2B0 R2B1 R2B2 R2B3 R2B4 R2B5 R2B6 R2B7 R3 Matrix R3B0 ...
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... Input selection ADC ADC1 Input selection ADC ADC2 Input selection ADC ADC3 Input selection ADC NWT Network tuning SOC Start of ADC conversion ADCR Selection of ADC range MSKIT Mask for interrupt bits Target Specification U4091BM Status ...
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... R15B4 R15B5 R15B6 R15B7 Power-on Reset To avoid undefined states of the system when it is powered on, an internal reset clears the internal registers. The system (U4091BM + microcontroller) is woken up by any of the following conditions: VMP > 2.75 V and VB > 2.95 V and line voltage (VL) or ringer (VRING) ...
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... Acoustic Feedback Suppression Acoustical feedback from the loudspeaker to the hands- free microphone may cause instability of the system. The U4091BM has a very efficient feedback-suppression circuit which offers a 4-point- or alternatively a 2-point- signal-sensing topology (see figure 7). Two attenuators (TXA and SAI) reduce the critical loop gain via the serial bus either in the transmit or in the receive path ...
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... U4091BM Line LID IVDD OSCOUT VMP Reset t – start–up oscillator on VRING VB IVDD VMP OSCOUT Reset Line LID VMP LVI Reset OSCOUT Figure 10. Power-on reset (low voltage reset) 12 (29 4 Figure 8. Power-on reset (line Figure 9. Power-on reset (ringing) ...
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... The attenuators are then slowly switched (1.5 seconds) to idle mode. 4. Switching to the full transmit or receive modes from idle mode is at the fast rate (30 ms). Target Specification U4091BM Output I3 I4 Mode S X ...
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... U4091BM Summary of the Truth Table 1. The circuit will switch to transmit mode if a) Both transmit level detectors sense higher signal levels than the respective receive level detectors and b) The transmit background-noise monitor indi- cates the presence of speech. 2. The circuit will switch to receive mode if ...
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... MICRO SA Figure 14. Block diagram hands-free mode U4091BM 2-point signal sensing MICRO LOGT SA Figure 15. Block diagram hands-free mode U4091BM 4-point signal sensing Rev. A1, 02-Jun-98 TXA LOG AFS control LOG SAI TXA CLOGT BNMT Mode control BNMR CLOGR CT CCT AFS control DTD SAI ...
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... U4091BM Analog-to-Digital Converter ADC This circuit is a 7-bit successive approximation analog- to-digital converter in switched capacitor technique. An internal bandgap circuit generates a 1.25-V reference voltage which is the equivalent 1LSB = 19.5 mV. The possible input voltage at ADIN 2.48 V. The ADC needs an SOC (Start Of Conversion) signal. In the ‘ ...
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... R4B5 I5O2 R4B6 I5O3 R4B7 I5O4 AGATX0 AGATX1 AGATX2 TXO –10 dB 14596 Target Specification U4091BM Description Switch on MIC / LTX Switch on MIC / RXLS Switch on MIC / EPO Switch on MIC / AMREC Switch on MIC / AGCI Switch on DTMF / LTX Switch on DTMF / RXLS Switch on DTMF / EPO Switch on DTMF / AMREC ...
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... U4091BM Sidetone System LRX DIFF1 + 0–7dB – AGARX STO_DIFF AMP2 9dB Figure 19. Principle circuit of the sidetone balancing The SideTone Balancing (STB) has the task of reducing the crosstalk from LTX (microphone) to LRX (earpiece) in the frequency range of 0.3 to 3.4 kHz. The LTX signal is converted into a current in the MOD block ...
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... MIC2 Intercom MIC3 6dB steps micro– 0dB phone Answering machine AMPB Figure 20. Audio frequency signal management U4091BM Absolute Maximum Ratings Parameters Line current DC line voltage Maximum input current Junction temperature Ambient temperature Storage temperature Total power dissipation ...
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... U4091BM Electrical Characteristics kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms nF, resonator 3.58 MHz, all bits in reset condition, unless otherwise specified. M Parameters Test Conditions / Pins DC characteristics DC voltage drop-over circuit 100 mA L Transmission amplifier mA ...
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... rms 0.775 I 4 out 20 Ro GND = – imp Z imp = 0.8 0.8 Target Specification U4091BM Typ. Max. Unit Fig. + 0 rms dB V rms mA p – 80 – 77 dBmp ...
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... U4091BM Electrical Characteristics (continued) Parameters Test Conditions / Pins Gain for DTMF signal AMPB RECO1/2 EA[0: DTMF mA, ETX = I201 = 1, AGATX[0: DTMFM[0: DTMFF[0: Max. level at line Sum level, 600 DTMFM[0: DTMF level at line Sum level, 600 (low gain) DTMFM[0: Pre-emphasis 600 DTMFF4 = 0 ...
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... VRING or ES high Rev. A1, 02-Jun-98 Symbol Min. I –1.45 CHA I 0.95 DIS 18.6 24.6 30.6 36.6 36 AMREC, 24 240 = 1 V AMPB rms 50 –0 AMREC 60 VMP 2. Target Specification U4091BM Typ. Max. Unit Fig. –1.2 –0.95 mA 1 300 ...
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... U4091BM Electrical Characteristics (continued) Parameters Test Conditions / Pins Low-voltage interrupt 3 VMP decreasing Decrease VMP until INT returns to high Power-off reset 3 Low-voltage reset Decrease VMP until RESET returns to low Difference voltage VLVI – VLVR ...
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... 4.7 sSTA t 250 sDAT t 4.7 sSTOP t 4.7 wSTA t 4.0 hSTA t 0 hDAT hDAT H sSTA hDAT Figure 21. Bus timing diagram Target Specification U4091BM Typ. Max. Unit Fig 1.5 V 0.4 V 100 kHz 300 ...
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... IND sin sin U4091BM PWL PWL 3.58 MHz 14597 ...
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... MHz U4091BM PWL PWL + + 2.2 mH 556 68 nF SD103A V B 14600 ...
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... U4091BM Package Information Package SSO44 Dimensions in mm 18.05 17.80 0.3 0.8 16 (29) 2.35 0.25 0. Target Specification 9.15 8.65 7.50 7.30 0.25 10.50 10.20 technical drawings according to DIN specifications 13040 Rev. A1, 02-Jun-98 ...
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... TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone 7131 67 2831, Fax number 7131 67 2423 Rev. A1, 02-Jun-98 unauthorized use. Target Specification U4091BM 29 (29) ...