MC34216A Motorola, MC34216A Datasheet
MC34216A
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MC34216A Summary of contents
Page 1
... Programmable Telephone Line Interface Circuit with Loudspeaker Amplifier The MC34216A is developed for use in telephone applications where, besides the standard telephone functions, the group listening–in feature is also required. In cooperation with a microcontroller, the circuit performs all basic telephone functions including DTMF generation and pulse–dialing. ...
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... FEATURES Line Driver and Supply DC and AC Termination of the Line Programmable DC Mask: France, U.K., Startup, Low Voltage (MC34216ADW) Programmable DC Mask: France, U.K., Startup (MC34216ADWF) Current Protection Adjustable Set Impedance for Resistive and Complex Termination Efficient Supply Point for Loudspeaker Amplifier and Peripherals Handset Operation ...
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... Regulated Supply at Pin 21 Startup Mode 100 mA France and U. Low Voltage Mode (MC34216ADW Only 100 mA Current Consumption at Pin 21, Bit Regulated Supply in Protection Mode Reference Current @ Pin 20 LOGIC PINS Hook Status Output (Pin 17) Off– ...
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... Protection Mode ( U.K. Maximum Internal Transconductance (I2 = 5.6 A) Line Length Regulation ( Protection Mode ( Low Voltage Mode (MC34216ADW Only) Maximum Internal Transconductance (I2 = 3.5 A) Line Length Regulation (I2 = 7.9 A) Protection Mode (I2 = 7.9 A) Earpiece Gain Reduction when Muted Earpiece Gain Variation (EA Bit Changed to 1) ...
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... Characteristic TRANSMIT PABX MODE French and U.K. Transmit Gain (I2 = 2.0 A) Variation with Line Length ( Low Voltage Mode (MC34216ADW Only) Transmit Gain (I2 = 2.0 A) Variation with Line Length ( Variation with Line Current ( mA) Variation with Line Current ( 7.0 mA) RECEIVE PABX MODE French Internal Transconductance ( ...
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... Level on LAI (Pin mA, French and U.K. Masks) MFO123 = 1111, High Frequency Group MFO123 = 0111, High Frequency Group MFO123 = 0000, Low Frequency Group High/Low Frequency Pre–Emphasis NOTE: In low voltage mode, above levels must be reduced by 0.5 dB. 6 MC34216A (continued Symbol Min 5.15 IcR – ...
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... LAI 10 HYN 11 NDC IMP 14 SAO 15 SAI 16 Osc 17 D/HS 18 Clk ref MOTOROLA ANALOG IC DEVICE DATA MC34216A Min Typ Max 689.4 696.4 703.4 761.5 769.2 776.9 844.7 853.2 861.7 930.5 939.9 949.3 1195.6 1207.7 1219.8 1323.5 1336.9 1350.3 1464.5 1479.3 1494 ...
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... In off–hook position, the application is in speech mode. The line current flows through transistor T2 and supplies the application at the supply point V CC which is stabilized by the MC34216A. The V line , I line characteristic is programmed by the microcontroller and adjusted by the external components Z0, Z1, Z21 and R1 which are in a regulator loop, acting on transistor T2 ...
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... Figure 2. Block Diagram of the MC34216A with Essential Components Line + C17 To IMP C20 RXO1 26 Ear RXO2 R6 27 RXI Mute, AGC Handset Earpiece TXI Mute, AGC 6 Mic Mic Handset C24 Volume 7 Microphone LPO 23 LSP R30 LPI 24 Speaker R28 AGC 28 C21 C25 Line – ...
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... Pin Gnd. Startup of the application is ensured by an internal startup circuit. During the startup, the internal registers of the MC34216A are reset, and the reset Pin R S goes high. This signals is meant to indicate to the microcontroller that the programming of the MC34216A can start. ...
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... Impedance In Figure 5, the block diagram of the MC34216A performing the ac impedance is depicted. As can be seen partly in common with the dc mask block diagram. The part generating the dc mask is replaced voltage source because for ac, this part has no effect. Figure 5. AC Stage of the MC34216A ...
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... Receive The receive portion of the MC34216A is shown in Figure 9. The receive signal is picked up by the amplifier at the HYN input. This is the same amplifier as present in the dc loop of Figure 4. The signal is first converted to current by the transconductance amplifier with transfer G e ...
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... Loudspeaker Amplifier The block diagram of the loudspeaker amplifier which is incorporated in the MC34216A is depicted in Figure 11. Figure 11. Block Diagram of the Loudspeaker Amplifier Z1 R20 C17 Line + ...
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... Handsfree A speakerphone application for handsfree conversation can easily be made with the MC34216A by adding one of the Motorola speakerphone cores to it. The TXI input can be used to amplify the transmit signal and the earphone output can be used to monitor the receive signal. The receive output of the speakerphone core can be connected to AHO1 ...
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... DTMF tones, listening–in mode, loudspeaker volume, etc. The bus interface of the microcontroller with the MC34216A consists of 2 wires: a data wire and a clock wire connected to Pins D/HS and CLK respectively. Also, the reset Pin RST of the MC34216A is connected to the microcontroller. The MC34216A itself has a local oscillator connected to Pin Osc ...
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... Select DTMF/Idle Tone Level (Level I LAI ) DCM1 DCM0 Function 0 0 Startup Mask for France 0 1 U.K. Mask 1 0 Low Voltage Mask 1 1 French Mask 16 MC34216A Figure 15. Register Description Symbol Function MicM Microphone Mute 0 = Muted EM Earphone Mute 0 = Muted LD Loop Disconnect 0 = Loop Closed PT Pilot Tone 0 = Tone “Off” IT Idle Tone 0 = Tone “ ...
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... The dc mask of the MC34216A can be programmed to fit the different country requirements. During startup, this will be the first register which has to be programmed in order to have a dc setting as soon as possible. The pulse–dialing is timed by the microcontroller (make/brake ratio, inter–digit pause) by making the LD bit high and low ...
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... Support Material Device Specification: Brief description of the MC34216A, block diagram, device data, bus specification, test diagram, typical application User Manual MC34216A: Extended description of the circuit and its concept, description of the programmability, adjustment procedure, application hints and proposals Demonstration Board: Performance of the MC34216A is ...
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... MOTOROLA ANALOG IC DEVICE DATA MC34216A 19 ...
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... TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 17.80 18.05 0.701 0.711 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.41 0.90 0.016 0.035 F G 1.27 BSC 0.050 BSC J 0.23 0.32 0.009 0.013 K 0.13 0.29 0.005 0.011 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 MC34216A/D ...