tca3388 Freescale Semiconductor, Inc, tca3388 Datasheet
tca3388
Available stocks
Related parts for tca3388
tca3388 Summary of contents
Page 1
... Advance Information Telephone Line Interface The TCA3388 is a telephone line interface circuit which performs the basic functions of a telephone set in combination with a microcontroller and a ringer. It includes dc and ac line termination, the hybrid function with 2 adjustable sidetone networks, handset connections and an efficient supply point. ...
Page 2
... Internal Offset (Pins 5 to 10) SPEECH AMPLIFIERS IMP Voltage (Pin 9, Closed Loop) Earpiece Amplifier DC Bias (R ext = 100 kΩ) RXI, Pin 1 RXO1 Pin 19 RXO2, Pin 20 Offset (V RXO1 – V RXO2 ) 2 TCA3388 Simplified Block Diagram DC and AC Termination DC Mask Generation Supply AC Termination Stabilizer 2–4 Wire Conversion ...
Page 3
... Delta Offset Voltage on SAI (I2E = 20 µA) Overvoltage Protection Threshold (V LAI – V SAO ) French and U.K. DC Masks Low Voltage DC Mask Protection Voltage Level (V LAI – V SAO ) French and U.K. DC Masks Low Voltage DC Mask MOTOROLA ANALOG IC DEVICE DATA TCA3388 ( Symbol Min V HY1 – V HY2 – ...
Page 4
... Internal Transconductance (I2 = 3.0 µA) Hybrid Weighting Factor (I2 = 3.0 µA) Variation with Line Length ( µA) DISTORTION French Transmit ( µA) Receive (I2 = 6.0 µA) NOTE the differential earpiece voltage across Pins 19 and 20. 4 TCA3388 ( Symbol Kµ0 ∆Kµ Kµp Kµ0 ∆Kµ Kµp ∆ ...
Page 5
... DCM 13 HSO MUT 16 I ref Gnd 19 RXO1 20 RXO2 MOTOROLA ANALOG IC DEVICE DATA TCA3388 ( Symbol THDT 700 mV THDR 1250 mV Typical Value @ 25 C 3.7 400 µA 1.0 µA/ French = 0.47 Vdc U.K. = 0.70 Vdc V D French = 0.49 Vdc U.K. = 0.72 Vdc 125 mV/µA 12 ...
Page 6
... In off–hook position, the application is in speech mode. The line current flows through transistor T2 and supplies the externals (microcontroller) at the supply point V CC which is stabilized by the TCA3388. The V line , I line characteristic is adjusted by the external components Z0, Z1, Z21 and R1 which are in a regulator loop, acting on transistor T2. The ac ...
Page 7
... Region 1: Startup, Low Line Current, High Slope Region 2: Mid–Range Line Current, Low Slope Region 3: High Line Current, High Slope Region 4: Overload Protection Figure 5. DC Part of the Block Diagram of the TCA3388 Line + C16 HYL ...
Page 8
... AC CHARACTERISTICS Impedance In Figure 6, the block diagram of the TCA3388 performing the ac impedance is depicted. As can be seen it is partly common with the dc mask block diagram. The part generating the dc mask is replaced voltage source because for ac, this part has no influence ...
Page 9
... TX Practically, the gain can be varied only with Z0 and R Mic . The TCA3388 offers the possibility to mute the microphone, also called privacy mode, by making the MUT Pin high. During pulse–dialing, the microphone bias is switched off. Pin Mic will be made high impedance, shutting off the microphone dc current. This reduces the current consumption of the circuit during pulse– ...
Page 10
... BE + V01 SAI Line – RECEIVE The receive part of the TCA3388 is shown in Figure 10. The receive signal is picked up by the amplifiers at the HYL/HYS inputs. These are the same amplifiers present in the dc loop of Figure 5. The signal is first converted to current by the transconductance amplifier with transfer The multiplier placed after performs the line length AGC ...
Page 11
... French and U.K. mask and in region 2 for the Low Voltage mask. LINE LENGTH AGC The TCA3388 offers the possibility to vary the transmit and receive gain over line length in order to compensate for the loss in gain at longer line lengths. In the block diagrams of the transmit and receive channels (Figures 9, 10) the line AGC is drawn ...
Page 12
... TCA3388 MOTOROLA ANALOG IC DEVICE DATA ...
Page 13
... Figure 14. List of Components for Typical Application TCA3388 Location Item Item on Board Basic L.V. R1 Line Driver 16 R3 Line Driver R5 Line Driver R6 Receive Gain R7 Transmit Gain R8 DTMF Gain R9 Transmit Gain R11 DTMF Gain R12 I ref , Pin 16 R13 Z0 580 k R14 Z0 – R15 Z1 620 k R16 Z1 130 k ...
Page 14
... Figure 14. List of Components for Typical Application TCA3388 Location Location Item Item on Board on Board Basic L.V. C18 Mask Setting – C19 Pin 19 C20 Pin 20 C21 Mask Setting – C22 Pin 17 C23 Z21 C24 Transmit Gain C25 Pin 2 C26 Pin 16 T1 Line Driver T2 Line Driver ...
Page 15
... 0.25 (0.010) –A– –B– 20X 0.010 (0.25 18X K MOTOROLA ANALOG IC DEVICE DATA TCA3388 OUTLINE DIMENSIONS DP SUFFIX PLASTIC PACKAGE CASE 738-03 ISSUE 0.25 (0.010 SUFFIX PLASTIC PACKAGE CASE 751D–03 ...
Page 16
... JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 *TCA3388/D* MOTOROLA ANALOG IC DEVICE DATA TCA3388/D ...