Low Voltage Telephone Speech Transmission Circuit (High Level Mute) HC1062 Low Voltage Telephone Speech Transmission Circuit (Low Level Mute) HC1062A HSiN Semiconductor Pte Ltd www.hsin.com.sg 1. Overview The HC1062(High Level Mute) /HC1062A (Low Level Mute) are integrated circuit that perform all speech and line interface functions required in fully electronic telephone sets. They also perform electronic switching between dialing and speech. The ICs operate at line voltage down to 1.6V (with reduce performance) to facilitate the use of more telephone sets connected in parallel. Low line voltage down to 1.6V (excluding polarity guard) Voltage regulator with adjustable static resistance Provides a supply for external circuit Symmetrical high-impedance inputs (64k ) for dynamic, magnetic or piezoelectric microphone Asymmetrical high-impedance (32k ) for electret microphone DTMF signal input with confidence tone Mute input for pulse or DTMF dialing Receiving amplifier for dynamic, magnetic or piezoelectric earpieces Large gain range settings for microphone and earpieces amplifiers Line loss compensation (line current dependent) for microphone and earpiece amplifier Gain control curve adaptable for exchange supply DC line voltage adjustment facility 1 13 5 10 4 7 6 2 dB 11 3 12 Reference Control Current Low Voltage Reference 9 14 15 8 Page 1 of 6 16 2. 2 Pin Description Pin No. 1 Symbol LN+ 2 ADJMIC1 3 ADJMIC2 4 OUTR 5 ADJR 6 IN-MIC 7 IN+MIC 8 CS Description Positive Line Gain Adjustment, Transmitting AMP Gain Adjustment, Transmitting AMP Receiving Output Gain Adjustment, Receiving AMP Inverting Microphone Input Non-Inverting Microphone Input Current Stabilizer Pin No. 9 Symbol LN- Description Negative Line 10 INR Receiving Input 11 INDTMF DTMF Input 12 INMUTR Mute Input 13 VCC Supply Voltage 14 REG De-coupling 15 INAGC AGC Input 16 ADJSL Slope Adjustment 3. Electrical Characteristics 3. 1 Absolute Maximum Ratings Unless otherwise specified, Tamb= 25 Parameter Symbol Continuous Line Voltage VLN Repetitive Line Voltage VLN Repetitive Peak Line Voltage VLN Line Current Input Voltage of All Pins Power Dissipation Junction Temperature Operating Temperature Storage Temperature ILINS VPINS PD TJ Tamb Tstg Conditions During switch on or interruption R9=20 ,R10=13 tp/p=1ms/5s R9=20 R9=20 Value 12 Unit V 13.2 V 28 V 140 VCC+0.7/-0.7 666 125 -25 ~ 75 -40 ~ 125 mA V mW 3. 2 Electrical Characteristics Unless otherwise specified, Tamb= 25 , ILINE =11~140mA, V9=0V, f=800HZ Value Parameter Symbol Test Conditions Min Typ Supplies LN and VCC pin 1 and 13 ILINE =1mA 1.6 ILINE =4mA 1.9 Line Voltage When MIC Input VLN ILINE =15mA 3.55 4.0 Open ILINE =100mA 4.9 5.7 ILINE =140mA VLN Variation with 0.3 ILINE =15mA Temperature / T 3.5 RAV=68k (LN to REG) VLN with external VLN Resistor 4.5 RAV =68k (REG to SLPE) Supply Current ICC VCC=2.8V 0.9 Supply for VCC IP=1.2mA 2.2 2.7 External Circuit IP=0mA 3.4 VCC Page 2 of 6 Max 4.25 6.5 7.5 Unit V V V V V mV/K 1.35 V V mA V V Parameter Microphone Input Input Impedance Differential Input Impedance Single Common Mode Rejection Voltage Gain Gain Variation with Frequency Gain Variation with Temperature Transmitting Gain Variation Transmitting Amp Output Voltage Output Noise Voltage DTMF Input Impedance Voltage Gain from DTMF to LN Gain Variation with Frequency Gain Variation with Temperature Receiver Input Impedance Input Impedance Voltage Gain Gain Variation with Frequency Gain Variation with Temperature Output Voltage RL=150 Output Voltage RL=450 Symbol Min Value Typ Max Unit ZI Between Pin 6 and 7 64 k ZI Between pin 6 ( or 7) and 9 32 k 82 dB CMR AV AVf AVT AV VLN VLN Between pin 6 ( or 7) and 1 ILINE =15mA, R7=68 k f=300 ~ 3400Hz w.r.t.800Hz Tamb= -25 ~ 75 w.r.t. 25 , ILINE =50mA Adjust R7 between Pin 2 and 3 ILINE =15mA THD=10% ILINE =4mA THD=10% ILINE =15mA, R7=68 k 200 between pin 6 and 7 ZI Pin 11 AV ILINE =15mA R7=68 k AVf AVT ZI ZO AV AVf AVT VO Output Voltage VO Output Noise Voltage VNO Gain Variation with R4 Test Conditions AV 50.5 1.7 24.0 THD=2%, IP=0mA Sine wave drive R4=100k , ILINE =50mA 29.5 Page 3 of 6 dB dB +0.2 dB 0 V 2.3 V 0.8 V 0.27 mV 20.7 k 25.5 27.0 dB +0.2 dB +0.2 dB 21 4 31 k 32.5 dB +0.2 dB +0.2 dB 0.22 0.33 V 0.30 0.48 V 15 mV 50 uV THD=10%, R4=100k ILINE =4mA, RL=150 Pin 10 open circuit R4=100k ILINE =15mA, RL=300 Between Pin 4 and 5 53.5 +0.2 -8 f=300~3400Hz w.r.t.800Hz Tamb=-25~75 w.r.t. 25 , ILINE =50mA Pin 10 Pin 4 ILINE =15mA, RL=300 f=300~3400Hz w.r.t.800Hz Tamb=-25~75 ,without R6 w.r.t. 25 ILINE =50mA 52 -11 0 dB Parameter Symbol Mute High Level Input Voltage Low Level Input Voltage Input Current Test Conditions Value Typ Min Unit Max 1.5 VCC V 0.3 V 15 uA VIH Pin 12 VIL Pin 12 IMUTE Pin 12 8 From pin 6 (or 7) to pin 1 From pin 11 to pin 4 R4=100k , RL=300 70 dB -19 dB -5.8 dB -5.8 dB 23 mA 61 mA Gain Attenuation AV Voltage Gain AV AGC AGC Control Range AGC Control Range Max. Line Current ILINEM From pin 10 to pin 4 R4=110k , ILINE =70mA From pin 6 (or 7) to pin 1 R4=110k , ILINE =70mA Highest gain Max. Line Current ILINEm Lowest gain AV AV 4. Test Circui 620 600 RL 150 1 13 100K 10 4 + 10uF R4 K2-1 7 K1 C7 HC1062/A 1000pF 6 2 68K K2-1 1000pF 5 G G C4 11 K3 C8 R3 12 3 9 + 14 100pF 16 8 15 C3 10uF 3.6k 4.7uF K4 C3 20 220k R6 R5 G Page 4 of 6 R9 K7 450 100pF RL K5 C2 10uF + K6 140mA C1 100uF + + 100uF 10 R1 5. Characteristics Curve Page 5 of 6 6. Application Circuit 620 R10 D5 R1 R2 130k C2 C5 D1 Telephone Line 1 100nF 13 100uF 10 C1 D2 4 100pF D3 13 3.92k D4 R3 R4 C4 11 from dial and 5 1nF ＨＣ1062/A control circuit C7 12 7 6 16 2 390 100pF R8 C6 3 14 15 4.7uF R9 9 RVA(14-16) Zbal 20 8 1nF C8 7. Package Dimensions Page 6 of 6 C3 R6 3.6k R5