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SL34118D Datasheet(PDF) 8 Page - System Logic Semiconductor |
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SL34118D Datasheet(HTML) 8 Page - System Logic Semiconductor |
8 / 12 page SL34118 System Logic Semiconductor SLS Pin No Designation Description 12 MUT Mute input. A logic low (<0.8 V) sets normal operation. A logic high (>2.0 V) mutes the microphone amplifier without affecting the rest of the circuit. Input impedance is nominally 90 Ω. 13 VLC Volume control input. When VLC = VB, the receive attenuator is at maximum gain when in the receive mode. When VLC = 0.3 VB, the receive gain is down 35 dB. Does not affect the transmit mode. 14 CT An RC this pin sets the response time for the circuit to switch modes. 15 VB An output voltage ≈V CC/2. This voltage is a system ac ground, and biases the volume control. A filter cap is required. 16 CPT An RC at this pin sets the time constant for the transmit background monitor. 17 TLI2 Input to the transmit level detector on the mike speaker side. 18 TLO2 Output of the transmit level detector on the mike/speaker side, and input to the transmit background monitor. 19 RLO2 Output of the receive level detector on the mike/speaker side. 20 RLI2 Input to the receive level detector on the mike/speaker side. 21 RXI Input to the receive attenuator and dial tone detector. Max input level is 350 mV RMS. Input impedance is ≈10 KΩ. 22 RXO Output of the receive attenuator. DC level is approximately VB. 23 TLI1 Input to the transmit level detector on the line side. 24 TLO1 Output of the transmit level detector on the line side. 25 RLO1 Output of the receive level detector on the line side, and input to the receive background monitor. 26 RLI1 Input the receive level detector on the line side. 27 CPR An RC at this pin sets the time constant for the receive background monitor. 28 GND Ground pin for the entire IC. MAXIMUM RATINGS * Symbol Parameter Value Unit VCC Supply Voltage (Pin 14) -1.0 to +7.0 V VIN Input Voltage at CD(Pin 3), MUT (Pin 12) -1.0 toVCC +1.0 V V VIN Input Voltage at VLC (Pin 13) -1.0 toVCC +0.5 V V VIN Input Voltage at TXI(Pin 9), RXI (Pin 21), FI (Pin 2) -0.5 toVCC +0.5 V V Tstg Storage Temperature Range -65 to +150 °C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. |
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