U4091BM-N ATMEL [ATMEL Corporation], U4091BM-N Datasheet
U4091BM-N
Related parts for U4091BM-N
U4091BM-N Summary of contents
Page 1
... DC/DC converter, sidetone equivalent and ear-protection rectifiers. The circuit is line-powered and contains all components nec- essary for signal amplification and adaptation to the line. The U4091BM-N can also be supplied via an external power supply. An integrated voice switch with loudspeaker amplifier enables hands-free or loudhearing operation ...
Page 2
... Figure 1. Block Diagram Speech DTMF U4091BM-N 2 Voice circuit switch Serial bus Audio amplifier Clock Data MCU Reset Tone ringer 4666B–CORD–08/04 ...
Page 3
... Figure 2. Detailed Block Diagram 4666B–CORD–08/04 U4091BM-N 3 ...
Page 4
... Pin Configuration Figure 3. Pinning SSO44 U4091BM RECIN TXACL 3 MIC3 MIC2 5 40 MIC1 6 39 RECO2 7 38 RECO1 IND SENSE 10 U4091BM GND SAO2 31 SAO1 14 VMPS 30 15 VMP 16 29 VMIC 28 17 TSACL 27 18 VRING 26 19 IMPA ...
Page 5
... Time constant for mode switching of voice switch 34 TLDR Time constant of receive-level detector 35 INLDR Input of receive-level detector 36 INLDT Input of transmit-level detector 37 TLDT Time constant of transmit-level detector 38 IMPSW Switch for additional line impedance Note: 1. The protection device at Pin RECIN is disconnected. 4666B–CORD–08/04 (1) U4091BM-N 5 ...
Page 6
... The U4091BM-N contains two identical series regulators which provide a supply voltage VMP of 3.3 V suitable for a microprocessor. In speech mode, both regulators are active because VMPS and VB are charged simultaneously by the DC line interface. The output current is 6 mA. The capacitor at VMPS is used to provide the microcomputer with suffi- cient power during long line interruptions ...
Page 7
... RIMPA (ZRING = RIMPA/100) and the efficiency of the step-down converter is approxi- mately 65%. The U4091BM-N provides an output signal for the microcontroller. This output signal is always double the value of the input signal (ringing frequency generated by a cur- rent comparator with hysteresis. The levels for the on-threshold are programmable in 16 steps, the off-level is fixed ...
Page 8
... The serial bus is a bi-directional system consisting of a one-directional clock line (SCL) which is always driven by the microcontroller, and a bi-directional data-signal line driven by the microcontroller as well as from the U4091BM-N (see Figure 24 on page 37). The serial bus requires external pull-up resistors as only pull-down transistors (Pin SDA) are integrated ...
Page 9
... DTMF Mode Table 6. DTMFF4 in DTMF Mode Pre-emphasis Selection 0 1 U4091BM-N Status DTMF generator OFF Confidence tone melody on (sinus) Ringer melody (pulse) Ringer melody (square signal) DTMF (mid level) DTMF (low level) DTMF (high level) – Frequency Error (%) 697 -0 ...
Page 10
... U4091BM-N 10 Table 7. DTMF and Melody Frequencies DTMFF f Decimal [0: 00000 440.0 1 00001 466.2 2 00010 493.9 3 00011 523.2 4 00100 554.4 5 00101 587.3 6 00110 622.3 7 00111 659.3 8 01000 698.5 9 01001 740.0 10 01010 784.0 11 01011 830.0 12 01100 880.0 13 01101 932.3 14 01110 987.8 15 01111 1046.5 ...
Page 11
... Figure 7. Fast Read Cycle 4666B–CORD–08/04 Write cycle Data from P Normal read cycle A1 A0 R/W=1 D7 Strobe from P Fast read cycle CLOCK DATA D7=IZC D6=IVE Data from U4091B Strobe from P U4091BM R/W=0 Strobe from Data from U4091B D0 11 ...
Page 12
... R2B6 R2B7 R3 Matrix R3B0 R3B1 R3B2 R3B3 R3B4 R3B5 R3B6 R3B7 R4 Matrix R4B0 R4B1 R4B2 U4091BM-N 12 Name Description ENRING Enable ringer ERX Enable receive part ETX Enable transmit part ENVM Enable VM-generator ENMIC Enable microphone ENSTBAL Enable side tone MUTE Muting earpiece amplifier ...
Page 13
... EA0 Gain earpiece amplifier LSB EA1 Gain earpiece amplifier EA2 Gain earpiece amplifier EA3 Gain earpiece amplifier EA4 Gain earpiece amplifier MSB IMPH Line impedance selection ( LOMAKE Short circuit during pulse dialing U4091BM-N Status ...
Page 14
... R12B1 R12B2 R12B3 R12B4 R12B5 R12B6 R12B7 R13 CLK R13B0 RTH R13B1 TM R13B2 U4091BM-N 14 Name Description AIMP Switch for additional external line impedance AFS0 AFS gain adjustment LSB AFS1 AFS gain adjustment AFS2 AFS gain adjustment AFS3 AFS gain adjustment AFS4 ...
Page 15
... Adjustment for calculated transmit log amp LSB CLOT1 Adjustment for calculated transmit log amp CLOT2 Adjustment for calculated transmit log amp CLOT3 Adjustment for calculated transmit log amp CLOT4 Adjustment for calculated transmit log amp MSB U4091BM-N Status ...
Page 16
... Watchdog Function Acoustic Feedback Suppression U4091BM avoid undefined states of the system when it is powered on, an internal reset clears the internal registers. The system (U4091BM-N + microcontroller) is woken up by any of the following conditions: • VMP > 2.75 V and VB > 2.95 V • and line voltage (VL) • ...
Page 17
... CBNMT BNMT BNM Mode control LOG CALCR CT CCT AFSCON DTD SAI Line LID t on VMP Reset 4 start-up oscillator on U4091BM-N AGATX LOG CALCT BNM LOG INLDR BNMR TLDR RRU CBNMR CRLO CRU RECO1 RECO2 STO Line AGARX HV 17 ...
Page 18
... Figure 10. Power-on Reset (Ringing) VRING OSCOUT Figure 11. Power-on Reset (Low Voltage Reset) VMP Reset OSCOUT Dial-Tone Detector Background Noise Monitors U4091BM IVDD VMP t on Reset t rt Line LID LVI The dial-tone detector is a comparator with one side connected to the speaker amplifier input and the other to VM with a 35-mV offset (see Figure 12 on page 21) ...
Page 19
... LOGT > CLOGR LOGT < CLOGR LOGR < CLOGT LOGR > CLOGT BNMT detects speech BNMT detects noise BNMR detects speech BNMR detects noise U4091BM-N Output I3 I4 Mode S X Transmit Y Y Change mode Y Y Change mode X S Receive ...
Page 20
... Term Definitions Summary of Truth Table U4091BM Transmit means the transmit attenuator is fully on, and the receive attenuator is at maximum attenuation. 2. Receive means the receive attenuator is fully on, and the transmit attenuator is at maximum attenuation Idle mode, the transmit and receive attenuator are at half of their maximum attenuation. – ...
Page 21
... Figure 12. Dial Tone Detector IN V Figure 13. Background Noise Monitor TLDR + (TLDT Figure 14. Generation of Control Voltage (CT) for Mode Switching U4091BM-N + OUT - to mode control DTD BNMR (BNMT ...
Page 22
... Figure 15. Block Diagram Hands-free Mode U4091BM-N 2-point Signal Sensing Figure 16. Block Diagram Hands-free Mode U4091BM-N 4-point Signal Sensing MICRO LOGT U4091BM-N 22 TXA MICRO AFS control SA SAI TXA BNMT Mode control CLOGR CCT AFS control SA SAI LOG Line LOG CLOGT BNMR LOGR ...
Page 23
... The source impedance at ADIN must be lower than 250 k . Accuracy: 1 LSB + 3% Figure 17. Timing of ADC SOC EOC Figure 18. ADC Input Selection IL x 20mV/(1mA x S) ADIN 0 0.4 x VMPS 0.4 x VMP 8 x (TLDR-REF (TLDT-REF) 0.4 x SAO1 0.4 x OFF1 0.4 x OFF2 0.4 x OFF3 U4091BM SOC MSB BIT5 BIT4 ADC BIT3 BIT2 BIT1 LSB EOC 23 ...
Page 24
... Note measured digital word (0 D 127 programmable gain 0 peak value of the measured signal U4091BM-N 24 Symbol Value OFF 127 mA ADIN extern V2 = 2.5 V D/128 (maximum 2 (2.5 V/0.4) VMPS V4 = (2.5 V/0.4) VMP V5 = (2.5 V/0.4) TLDR (Vp - Ref) TLDT ...
Page 25
... Hz. The outputs RXLS, EPO and AMREC have a gain of 0 dB. The offset at the outputs of the matrix is less than 30 mV switch is open, the path has a damping of more than 60 dB. Figure 19. Switch Matrix Diagram AGCO I5 AGC O5 AGCI AMREC EPO RXLS U4091BM-N AMPB LRX DTMF MIC Offset Offset canceller canceller ...
Page 26
... U4091BM-N 26 Table 11. Bits and Corresponding Switches Register No. Name R2 R2B0 I1O1 R2B1 I1O2 R2B2 I1O3 R2B3 I1O4 R2B4 I1O5 R2B5 I2O1 R2B6 I2O2 R2B7 I2O3 R3 R3B0 I2O4 R3B1 I2O5 R3B2 I3O1 R3B3 I3O2 R3B4 I3O3 R3B5 I3O4 R3B6 I3O5 R3B7 I4O1 R4 R4B0 ...
Page 27
... In real life the line impedance ZL varies strongly for different users. To obtain good sup- pression with one application for all different line impedances, the STB function is programmable. The 3 programmable parameters are (gain at low frequency) LF has 15 programming steps of 0.5 dB LF(0) provides -2 dB gain, LF(15) provides 5.5 dB gain STO_DIFF(LF 0.5 dB U4091BM-N LINE 8dB CK MOD RECIN STO -10dB ...
Page 28
... Figure 21. Audio Frequency Signal Management U4091BM-N -3dB ... -10dB and 7dB (NWT Line MIC1 Handset micro- 0dB 30dB phone MIC2 Intercom MIC3 micro- 0dB phone Answering AMPB machine U4091BM (the pole position of the low-pass) The P adjustment has 31 steps. P(0) means the lowpass determined by the external application (RST, CST) ...
Page 29
... MICHF = 1 MICHF = mA 700 rms I 19 mA, d < 5 MIC CTXA = 1 µF, DBM5 = 0 DBM5 = mV, MICG[0: MIC U4091BM-N Value 140 12 15 125 -25 to +75 -55 to +150 0.9 Value 70 = 25° 100 , amb ear Symbol Min. Typ. Max. ...
Page 30
... Receiving noise phosphometrically weighted Side tone suppression Output resistance Gain at low operating current (receive only) Note: 1. This is a space of time where the bus must be from data transmission and before a new transmission can be started U4091BM 1 Test Conditions I 14 mA, MICG[0: AGATX[0: CTXA = 1 µ ...
Page 31
... Load resistance < mV AMPB > -10 to +60 C amb U4091BM-N = 25° 100 , amb ear Symbol Min. Typ. Max 0.8 1 1.2 0.8 1 1.2 -10 Z 595 625 655 impl Z 980 1030 ...
Page 32
... Release time Switching Matrix ENAM = I4O4 = 1, V Input impedance AMPB Gain AMPB to AMREC Note: 1. This is a space of time where the bus must be from data transmission and before a new transmission can be started U4091BM 1 Test Conditions mA dBm, ...
Page 33
... IMPSW = 1 IMPSW = mA 300 mV, L GEN mA µA L INLDT µA INLDR µA L INLDT µA INLDR U4091BM-N = 25° 100 , amb ear Symbol Min. Typ. Max. 600 VB- 600 mV V ±30 AMREC 60 VMP 2.65 2.75 2. 3.2 on VLVI 2 ...
Page 34
... Start condition Data Stop condition (1) Time space Hold Time Start condition DATA Note: 1. This is a space of time where the bus must be from data transmission and before a new transmission can be started U4091BM 1 Test Conditions = - mA 680 ...
Page 35
... Test Circuits Figure 22. Basic Test Circuit 4666B–CORD–08/04 U4091BM-N 35 ...
Page 36
... Figure 23. Test Circuit for Ringing U4091BM-N 36 4666B–CORD–08/04 ...
Page 37
... Package Information Package SSO44 Dimensions in mm 0.3 0 4666B–CORD–08/ hDAT H sSTA Stop Start Package SSO44 SSO44 Die 18.05 17.80 16.8 U4091BM-N t hSTA t t sSTOP hDAT Remarks Tube Taped and reeled Die on foil 9.15 8.65 7.50 7.30 2.35 0.25 0.10 10.50 10.20 23 technical drawings according to DIN specifications 22 P 0.25 37 ...
Page 38
Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 ...