UNIVERSAL SPEECH NETWORK S1T8603 INTRODUCTION 16−DIP−300A The S1T8603 can fulfill the standards of other countries by changing the external component. Dynamic or piezoelectric type can be used with receiver. Each gain is controlled with AGC in accordance with the line current. The S1T8603 can be operated down to D.C line 1.6V. FEATURES • Independent adjustment of DC resistance and AC impedance. • ECM or dynamic microphone can be used. • DTMF signal interface. • Mute function • Operates at the low line voltage (1.6V) • Low or high impedance receiver type can be used. • Low line current operation. (IL = 4mA) 16−SOP−225 ORDERING INFORMATION Device Package S1T8603X01-D0B0 16−DIP−300A S1T8603X-S0B0 16−SOP−225 Operating Temperature − 25°C to +75°C 1 S1T8603 UNIVERSAL SPEECH NETWORK BLOCK DIAGRAM Vcc VL 13 1 MUTE 12 INVERTER 5 RXGA 4 RXO 2 TXGA1 RXI 10 RXI RX AMP MXI MIC- 6 MIC+ 7 MIC AMP TX AMP ATTENU ATOR MF 11 DTMF AMP BIAS & REFERENCE BAND GAP REF AGC 9 8 14 GND CST VST 15 3 16 AGC TXGA2 PIN CONFIGURATION 2 VL 1 16 RDC TXGA1 2 15 AGC TXGA2 3 14 VST RXO 4 13 Vcc RXGA 5 12 MUTE MIC- 6 11 MF MIC+ 7 10 RXI CST 8 9 GND KA8603 S1T8603 R DC UNIVERSAL SPEECH NETWORK S1T8603 PIN DESCRIPTION Pin No Symbol Description 1 VL 2 TXGA1 TX gain adjustment 3 TXGA2 TX gain adjustment 4 RXO 5 RXGA 6 MIC- Mic(-) input 7 MIC+ Mic(+) input 8 CST Current stabilizer 9 GND Ground 10 RXI RX input 11 MF DTMF Input 12 MUTE 13 VCC Internal power supply pin 14 VST Voltage stabilizer 15 AGC Automatic gain control 16 RDC DC Resistance control Positive power line and TX Amp output RX output RX gain adjustment Mute ‘High’: DTMF mode, Mute ‘Low’: speech mode ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Value Unit Line Voltage VL 15 V Line Current IL 150 mA Surge Line Current IL(SURGE) 200 mA Power Dissipation PD 1.0 W Operating Temperature TORP − 25 — 75 °C Storage Temperature TSTG − 55 — 150 °C 3 S1T8603 UNIVERSAL SPEECH NETWORK ELECTRICAL CHARACTERISTICS (Ta = 25°C, f = 1kHz, IL = 15mA, unless otherwise noted) Characteristic Line Voltage Symbol VL Test Conditions Min. Typ. Max. IL = 4mA − 2.1 − IL = 15mA 3.55 3.9 4.25 IL = 50mA 4.1 4.6 5.1 IL = 140mA − 6.45 7.0 Unit V Line Voltage with RUP VLU Between Pin14 & Pin 16 R up = 220kΩ 4.15 4.35 4.55 V Line Voltage with RDOWN VLD Between Pin 14& Pin 1 R DOWN = 330kΩ 3.25 3.45 3.65 V R TX = 68kΩ VI = 3mVrsm IL = 15mA 49.5 51.5 53.5 IL = 50mA 45.5 47.5 49.5 IL = 80mA 43.5 45.5 47.5 TX Gain GV (TX) dB TX Gain frequency response ∆GTXF f = 300 to 3400Hz − ± 0.2 − dB TX Dynamic output voltage VO(TX) THD = 2% THD = 10% − 1.6 − Vrms 1.7 2.2 − − 64 − IL = 15mA 28.5 30.5 32.5 IL = 50mA 24.5 26.5 28.5 IL = 80mA 22.5 24.5 26.5 − ± 0.2 − dB Vrms MIC Input Impedance ZI(MIC) RX Gain GV(RX) − RLOAD = 150Ω+10u kΩ dB RX Gain frequency response ∆GRXF f = 300 to 3400Hz RX Dynamic output voltage VO(RX) THD = 2% (RL = 150Ω) THD = 10% 0.22 0.29 − 0.30 0.40 − R TX = 68KΩ (MUTE = H) 23.5 25.5 27.5 dB DTMF GAIN GV (MF) DTMF Input Impedance ZI (MF) − − 20.7 − kΩ VIH (MUTE) − 1.5 − VCC V VIL (MUTE) − − − 0.8 TX Gain variation range by AGC ∆GTXA R AGC = 180KΩ IL = 15 ~ 80mA − −6 − dB RX Gain variation range by AGC ∆GRXA R AGC = 180KΩ IL = 15 ~ 80mA − −6 − dB TX Noise Output Voltage (Psophometric weighted) VTNO − − −72 − dBmp RX Noise Output Voltage (Psophometric weighted) VRNO − − 50 − uV MUTE Input Voltage 4 UNIVERSAL SPEECH NETWORK S1T8603 APPLICATION CIRCUIT 10µF + TIP RECEIVER 100K 220µF + 620 RING 12V 100pF 120K 1 13 VL 4 V CC 5 RXO+ RXGA RXI AMP 100nF RXI AMP 10 RXI MIC- 3.9K TX AMP 7 390 MIC MIC+ 16 pin 14 6 MIC AMP V DC Rup TXGA1 2 200 TXGA2 MUTE CST 3 12 8 MF 11 GND AGC VST 9 15 14 Rdown pin1 + Zc Zr 500p 20 68K 3.6K 180K 1µF Figure 1. 5 S1T8603 UNIVERSAL SPEECH NETWORK NOTES 6