MC34118G-S28-R

UNISONIC TECHNOLOGIES CO., LTD MC34118 LINEAR INTEGRATED CIRCUIT VOICE SWITCHED SPEAKER-PHONE CIRCUIT  DESCRIPTION DIP-28 As a voice switched speaker-phone integrated circuit, the UTC MC34118 includes the necessary amplifiers, attenuators, level detectors and control algorithm. To form the UTC MC34118’s internal circuit, there is an internal microphone amplifier with adjustable gain and mute control, internal transmit and Receive attenuators (operate in a complementary manner), level detectors at both input and output of both attenuators, and background noise monitors for both the transmit and receive channels. The dial tone can be pretended from being attenuated by the receive background noise monitor circuit by a dial tone detector. There are also two line driver amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer. A high-pass filter can be used for other filtering functions, and especially to filter out 60Hz noise in the receive channel. The UTC MC34118 which requiring typically 5mA may be operated from a power supply, or it can be powered from the telephone line.  SDIP-28 SOP-28 FEATURES * Attenuator gain range: 52dB (between Transmit and Receive) * For line-powered applications : 3~6.5V low voltage operation * For improved sensitivity :4-point signal sensing * For Transmit and Receive paths: background noise monitors * External resistors set microphone amplifier gain * Mute function included * Chip disable: active or standby operation * During dial tone presence: dial tone detector to inhibit receive idle mode  ORDERING INFORMATION Ordering Number Lead Free MC34118L-E28-T - Halogen Free MC34118G-D28-T MC34118G-E28-T MC34118G-S28-T MC34118G-S28-R www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd Package Packing DIP-28 SDIP-28 SOP-28 SOP-28 Tube Tube Tube Tape Reel 1 of 15 QW-R108-007.F UNISONIC TECHNOLOGIES CO., LTD LINEAR INTEGRATED CIRCUIT MC34118  MARKING PACKAGE MARKING SOP-28 SSOP-28 DIP-28 SDIP-28  PIN CONFIGURATION FO FI CD VCC HTO+ HTOHTI TXO TXI MCO MCI MUT VLC CT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 28 27 26 GND 25 24 23 22 21 20 19 RLO1 18 17 16 15 CPR RLI1 TLO1 TLI1 RXO RXI RLI2 RLO2 TLO2 TL12 CPT VB 2 of 15 QW-R108-007.F UNISONIC TECHNOLOGIES CO., LTD LINEAR INTEGRATED CIRCUIT MC34118  PIN DESCRIPTION PIN NO 1 2 PIN NAME FO FI 3 CD 4 VCC 5 HTO+ 6 HTO- 7 8 HTI TXO 9 TXI 10 11 MCO MCI 12 MUT 13 VLC 14 CT 15 VB 16 17 CPT TLI2 18 TLO2 19 20 RLO2 RLI2 21 RXI 22 23 RXO TLI1 24 TLO1 25 26 27 28 RLO1 RLI1 CPR GND DESCRIPTION Output of filter. The output impedance is less than 50Ω. Input of filter. The input impedance is less than 1MΩ. Chip Disable input .A logic low (voltage lower than 0.8V) sets normal operation. A logic high (voltage higher than 2V) disable the IC. This pin’s input impedance is 90 KΩ nominally. This pin requires a supply voltage of +2.8V ~ +6.5V at 5mA. After VCC falls from 3.5V ~ 2.8V, when in the receive mode, an AGC circuit reduces the receive attenuator gain by 25dB. The output of the second hybrid amplifier. This amplifier’s gain is internally set at -1. Output of the first hybrid amplifier. This amplifier’s gain of the amplifier is set by external resistors. The first hybrid amplifier’s input and summing node. DC level is about equal to VB. The transmit attenuator’s output. DC level is about VB. The transmit attenuator’s input. It’s maximum signal level is 350 mVrms. The input impedance is 10KΩ. The microphone amplifier’s output. This amplifier’s gain is set by external resistors. The summing node of the microphone’s input. DC lever is VB. Input of mute. A logic low (voltage lower than 0.8V) sets the circuit normal operation. A logic high (voltage higher than 2V) mutes the microphone amplifier, but it doesn’t affect the rest of the circuit. The input impedance is 90 K ohms. The input of Volume control. In the receive mode, when VLC=VB, the receive attenuator is at maximum gain. The receive gain is down 35dB when VLC=0.3dB, and it does not effect the transmit modes. At this pin, to switch modes, the RC sets the response time for the circuit. In this pin, there’s an output voltage=Vcc/2 which is a system AC ground and biases the volume control. What required is a filter capacitor. The time constant for the transmit background side can be set by the RC at this pin . The input to the transmit level detector which is on the microphone/ speaker side. The output to the transmit level detector which is on the microphone/ speaker side. Also the input to the transmit background monitor. The Output of the receive level detector which is on the microphone/ speaker side The input to the receive level detector which is on the microphone/ speaker side The input to the receive attenuator and dial tone detector. In this pin, the maximum input level is 350mVrms,and the input impedance is 10KΩ. The output of the receive attenuator. This pin’s DC level is VB. The input to the transmit level detector which is on the line side. The output to the transmit level detector which is on the line side, and also the input to the transmit background monitor. The output of the receive level detector which is on the line side. The input to the receive level detector which is on the line side. The time constant for the receive background monitor can be set by the RC at this pin. Ground. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 15 QW-R108-007.F UNISONIC TECHNOLOGIES CO., LTD LINEAR INTEGRATED CIRCUIT MC34118  BLOCK DIAGRAM MUT MCO TLI2 CT TXI TXO TLI1 HTI HTO- HTO+ 12 10 17 14 9 8 23 7 6 5 TX Attenuator MCI 11 CPT TLO2 16 Background Noise Monitor 19 CD 3 FI 2 VB Background Noise Monitor AGC 18 RLO2 VB Altenuator Conrol Level Delector 27 CPR 25 RLO1 24 TOL1 4 VCC Lever Detector RX Attenuator VB 1 20 13 22 FO RLI2 VLC RXO UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 21 26 15 RXI RLI1 VB 28 GND 4 of 15 QW-R108-007.F UNISONIC TECHNOLOGIES CO., LTD LINEAR INTEGRATED CIRCUIT MC34118  ABSOLUTE MAXIMUM RATING (TA=25°С,Voltages referred to pin 22) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -1~7 V Voltage at Pin 3 V3 -1~VCC+1 V Voltage at Pin 12 ( mute) V12 -1~VCC +1 V Voltage at Pin 13 ( VLC) V13 -1~VCC+0.5 V Voltage at Pin 9, Pin 21, and Pin 2 V9, 21, 2 -0.5~ VCC+0.5 V Storage Temperature TSTR -65~+150 °С Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  RECOMMENDED OPERATION CONDITIONS PARAMETER Supply Voltage Voltage at Pin 3 Voltage at Pin 12 ( MUTE) Voltage at Pin 13 ( VLC) IVB Current ( Pin 15) Attenuator Input Signal Voltage at Pin 9, Pin 21 RXO, TXO(Pin8, Pin 22) Load Current MCO(Pin 10) HTO-, HTO+(Pin 6, Pin5) Ambient Operating Temperature  SYMBOL V4 V3 V12 V13 IVB V9, V21 TOPR RATINGS 3.5~6.5 0~ VCC 0~ VCC 0.3×VB~VB 500 350 0~+-2 0~+-1 0~+-0.5 -20~+60 UNIT V V V V µA mVrms mA mA mA °С ELECTRICAL CHARACTERISTICS (TA= 25°C, unless otherwise specified) PARAMETER Supply Voltages V+ Supply Current CD Input Resistance High CD Input Voltage Low VB Output Voltage SYMBOL ICC RCD VCDH VCDL VB VB Output Resistance VB Power Supply Rejection Ratio Attenuators RX Mode, RXI=150mVrms RX Mode, RXI=150mVrms Receive Attenuator Gain Change Gain AGC Gain Change (f=1kHz, VLC=VB) Idle Mode, RXI=150mVrms RX to TX Mode Range Volume Control Range RXO DC Voltage RXO DC Voltage RXO High Voltage ROVB PSRR RXO Low Voltage VRXOL RXI Input Resistance GRX GRX GRX1 GRX2 GRXI GRX3 VCR VRXO VRXO VRXOH RRXI UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS VCC=6.5V, CD=0.8V VCC =6.5V, CD=2V VCC =VCD=6.5V VCC =3.5V VCC =5V IVB=1mA CVB=220µF, f=1kHz VCC=5V VCC =3.5V VCC =3.5V vs. VCC =5V VCC =3.5V vs. VCC =5V MIN 50 2 1.8 4 4 -0.5 -22 49 27 RX Mode RX to TX Mode IOUT=-1mA, RXI=VB+1.5V IOUT=+1mA, RXI=VB-1V, Output Measured with Respect to VB RXI