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TS34118CS28 Datasheet(PDF) 1 Page - Taiwan Semiconductor Company, Ltd |
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TS34118CS28 Datasheet(HTML) 1 Page - Taiwan Semiconductor Company, Ltd |
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1 / 20 page  TS34118CS28 Taiwan Semiconductor 1 Version: E1608 Voice Switched Speakerphone Circuit DESCRIPTION The TS34118 Voice Switched Speakerphone Circuit incorporates the necessary amplifiers, attenuators, level detectors, and control algorithm to form the heart of a high quality hands-free speakerphone system. Included are a microphone amplifier with adjustable gain and MUTE control, Transmit and Receive attenuators which 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. A Dial Tone Detector prevents the dial being attenuated by the Receive background noise monitor circuit. Also included are two line drive amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer. A high-pass filter can be used to filter out 60Hz noise in the receive channel, or for other filtering functions .A Chip Disable pin permits 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 FEATURES ● Improved attenuator gain range: 52dB between transmit and receive. ● Low voltage operation for line-power application (3V~6.5V). ● 4-point signal sensing for improved sensitivity ● Back ground noise monitors for both transmit and receive paths. ● Compatible with TS34119 speaker amplifier. ● Microphone amplifier gain set by external resistors- mute function included. ● Chip disable for active/standby operation. ● Compliant to RoHS Directive 2011/65/EU and in accordance to WEEE 2002/96/EC. ● Halogen-free according to IEC 61249-2-21 APPLICATION ● Hands-free operation system ● VOIP phone SOP-28 Pin Definition: 1. FO 8. TXO 15. VB 22. Gnd 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. CT 21. RXI 28. GND Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020 ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified) (Note 1) PARAMETER SYMBOL LIMIT UNIT Supply voltage (pin 4) VS -1.0, +7.0 V Voltage at CD (pin 3), MUT (pin 12) VCD, VMUT -1.0,Vcc +1.0 V Voltage at VCI (pin 13) VCI -1.0,Vcc +0.5 V Voltage at TXI (pin 9),RXI (pin 21),FI (pin 2) VTXI, VRXI, VFI -0.5,Vcc +0.5 V Storage temperature range TSTG -65 to +150 °C |
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