TS34118CS28 Taiwan Semiconductor Voice Switched Speakerphone Circuit DESCRIPTION FEATURES The TS34118 Voice Switched Speakerphone Circuit Improved attenuator gain range: 52dB between incorporates the necessary amplifiers, attenuators, transmit and receive. level detectors, and control algorithm to form the heart Low voltage operation for line-power application of a high quality hands-free speakerphone system. (3V~6.5V). Included are a microphone amplifier with adjustable 4-point signal sensing for improved sensitivity gain and MUTE control, Transmit and Receive Back ground noise monitors for both transmit and attenuators which operate in a complementary receive paths. manner, level detectors at both input and output of Compatible with TS34119 speaker amplifier. both attenuators, and background noise monitors for Microphone amplifier gain set by external resistors- both the transmit and receive channels. A Dial Tone mute function included. Chip disable for active/standby operation. Detector prevents the dial being attenuated by the Compliant to RoHS Directive 2011/65/EU and in Receive background noise monitor circuit. Also accordance to WEEE 2002/96/EC. included are two line drive amplifiers which can be Halogen-free according to IEC 61249-2-21 used to form a hybrid network in conjunction with an external coupling transformer. A high-pass filter can be APPLICATION used to filter out 60Hz noise in the receive channel, or Hands-free operation system for other filtering functions .A Chip Disable pin permits VOIP phone powering down the entire circuit to conserve power on long loops where loop current is at a minimum. The TS34118 may be operated from a power supply, or it can be powered from the telephone line, requiring typically 5.0mA. The TS34118 can be interfaced directly to Tip and Ring (through a coupling transformer) for stand-alone operation, or it can be used in conjunction with a handset speech network and/or other features of a feature phone SOP-28 Pin Definition: 1. FO 8. TXO 15. V 22. Gnd B 2. FI 9. TXI 16. CPT 23. TLI1 3. CD 10. MCO 17. TLI2 24. TLO1 4. Vcc 11. MCI 18. TLO2 25. RLO1 5. HTO+ 12. MUT 19. RLO2 26. RLI1 6. HTO- 13. VCI 20. RLI2 27. CPR 7. HTI 14. C 21. RXI 28. GND T Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020 (Note 1) ABSOLUTE MAXIMUM RATINGS (T = 25C unless otherwise specified) A PARAMETER SYMBOL LIMIT UNIT (pin 4) Supply voltage V -1.0, +7.0 V S (pin 3) (pin 12) V V V Voltage at CD , MUT -1.0,Vcc +1.0 CD, MUT (pin 13) V Voltage at VCI V -1.0,Vcc +0.5 CI (pin 9) (pin 21) (pin 2) V V V V Voltage at TXI ,RXI ,FI TXI, RXI, FI -0.5,Vcc +0.5 T C Storage temperature range STG -65 to +150 1 Version: E1608 TS34118CS28 Taiwan Semiconductor (Note 4) RECOMMENDED OPERATING CONDITION (T = 25C unless otherwise specified) A PARAMETER SYMBOL MIN TYP MAX UNIT (pin 4) (see Text) Supply voltage 3.5 -- 6.5 V V S (pin 3) (pin 12) CD input , MUT input V V 0 -- V V CC CD, MUT (pin 15) I current - -- 500 A I VB VB (pin 13) V VCI 0.3xV -- V V CI B B (pin 9,21) Attenuator input signal voltage V 0 -- 350 mVrms AIS Microphone amplifier, Hybrid amplifier gain 0 -- 40 dB (pins 8,22) Load current RXO, TXO 0 -- 2.0 (pin 10) MCO I 0 -- 1.0 mA LOAD (pin 6,5) HTO-, HTO+ 0 -- 5.0 Ambient operating temperature range -20 -- +60 C ELECTRICAL SPECIFICATIONS (T = 25C unless otherwise specified) A PARAMETER CONDITION SYMBOL MIN TYP MAX UNIT Power Supply V =6.5V, CD=0.8V -- 5.5 8.0 mA CC V supply current I CC CC V =6.5V, CD=2.0V -- 600 800 A CC CD input resistance (V =V =6.5V) R 50 90 -- k CC CD CD High V 2.0 -- V V CDH CC CD input voltage Low V 0 -- 0.8 V CDL V =3.5V -- 1.3 -- CC V output voltage V V B B V =5V 1.8 2.1 2.4 CC V output resistance I =1.0mA B VB R -- 400 -- OVB V power supply rejection ratio C =220F,f=1kHz PSRR -- 54 -- dB B VB Attenuators f=1kHz, V =V LC B Rx mode, R =150mV XI rms Receive attenuator gain G +4.0 +6.0 +8.0 dB RX V =5.0V CC V =3.5V CC Gain change V =3.5V vs. V =5.0V G -0.5 0 +0.5 CC CC RX1 AGC gain change V =2.8V vs. V =5.0V G -- -25 -15 CC CC RX2 Idle mode R =150mV G -22 -20 -17 dB XI rms RI Range R to T mode R to T mode G 49 52 54 X X RX3 Volume control range R mode, 0.3V <V <V V 27 35 -- dB X B LC B CR RXO DC voltage Rx mode V -- V -- V RXO B RXO DC voltage R to T mode V -- 10 150 mV X X RXO RXO high voltage I =-1mA, R =V +1.5V V 3.7 -- -- V O XI B RXOH I =+1mA, R =V -1V, O XI B RXO low voltage Output measured with V -- -1.5 -1.0 V RXOL respect to V B RXI input resistance R <350mV R 7.0 10 14 k XI rms RXI T mode, T =150mV G +4.0 +6.0 +8.0 dB X XI rms TX Transmit attenuator gain Idle mode, T =150mV G -22 -20 -17 dB XI rms TXI f=1kHz Range T to R mode G 49 52 54 dB X X TXI T mode V -- V -- V TXO DC voltage X TXO B TXO DC voltage T to R mode V -- 30 150 mV X X TXO 2 Version: E1608