深圳市科信达电子有限公司 KE XIN DA Electronics Co., LTD. SC2399 Digital Sound Processor Embedded 32K SRAM Features Operating voltage: 4.5V-5.5V ADM algorithm Low noise (-88dB typical) Low distortion rate (0.5%typical) Embedded 32K SRAM Automatic reset function Package type:16-pin DIP/SOP Description The SC2399 is an echo/surround effect processor. It is designed for carious audio system including karaoke, television, sound equipment, etc. the chip consists of a built-in pre-amplifier, VCO or Voltage control OSC, Embedded SRAM, A/D and D/A converters as well as delay time control logic. Its built-In reply to SRAM can generate delay time effect and can control the delay time value through the external VCO resistor. The VCO circuit can reduce external components and make it easy to adjust the delay time. Part Number Examples Part NO. Pkg Description SC2399 16-DIP 300mil-16-DIP Block Diagram LPF1 IN LPF1 OUT LPF2 OUT LPF2 OP2 IN OUT 4.7K ohm LPF2 + - COMP + OP1 OUT CC0 CC1 4.7K ohm MOD + - LPF1 + OP2 OP1 IN IN + DEM 1/2 VCC DI AUTO RESET MO DO0 MI RAM VCC REF AGND DGND CLOCK VCO OSC-O Page 1 of 5 VCO DO1 深圳市科信达电子有限公司 KE XIN DA Electronics Co., LTD. SC2399 Digital Sound Processor Embedded 32K SRAM PIN Configuration VCC 1 16 LPF1-IN REF 2 15 LPF1-OUT AGND 3 14 LPF2-OUT DGND 4 13 LPF2-IN OSC_O 5 12 OP2-OUT VCO 6 11 OP2-IN CC1 7 10 OP1-IN CC0 8 9 OP1-OUT PIN Description Pin NO. Pin Name I/O Description 1 VCC - Analog and positive power supply 2 REF I Analog reference voltage 3 AGEND - Analog ground 4 DGEND - Digital ground 5 OSC_O I System oscillator output 6 VCO I System oscillator input, system frequency adjustable pin 7 CC1 - Current control1 8 CC2 - Current control2 9 OP1_OUT O OP1 output 10 OP1_IN I OP1 input 11 OP2_IN I OP2 input 12 OP2_OUT O OP2 output 13 LPF2_IN I Low pass filter2 input 14 LPF2_OUT O Low pass filter2 output 15 LPF1_OUT O Low pass filter1 output 16 LPF1_IN I Low pass filter1 input Function Description The SC2399 is an echo/surround effect generator with built-in SRAM. It enaures low distortion as well al low noise for processing audio signal delay. The chip provides two playing modes (echo and surround) and the playing function block diagrams are shown as flows. - Surround Mode Vin→LPF1→A/D→Delay→D/A→LPF2→Vout - Echo Mode Vout Vin →LPF1 →A/D→Delay→D/A→LPF2 Page 2 of 5 深圳市科信达电子有限公司 KE XIN DA Electronics Co., LTD. SC2399 Digital Sound Processor Embedded 32K SRAM Electrical Characteristics TC=25℃ Symbol Test Conditions Parameter VDD Conditions Min. Typ. Max. Unit VCC Operating Voltage - - 4.5 5.0 5.5 V ICC Operating Current 5V - - 15 30 mA GV Voltage Gain 5V RL=47KΩ - 0.5 2.5 dB VOMAX Maximum Output Voltage 5V THD=10% 1.0 1.6 - Vrms THD Total Harmonic Distortion 5V 30khZ L.P.F - 0.5 1.5 % Output Noise Voltage 5V DIN Audio - -88 -80 dbV NO Absolute Maximum Ratings Supply Voltage………………………… -0.3V to 6V Input Voltage…………………………… Vss –0.3V to VDD+0.3V Storage Temperature…………………… -50℃ to 125℃ Operating Temperature………………… -20℃ to 70℃ Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Application Circuits Echo Mode C15 INPUT 4700pF C16 R10 20K U2 C22 C20 0.1uF C21 4.7uF 100uF R20 Radj R22 47K C29 VCC LPF1-IN 16 2 REF LPF1-OUT 15 3 AGND LPF2-OUT 14 4 DGND LPF2-IN 13 OP2-OUT 12 5 OSC_O 6 VCO OP2-IN 11 7 CC1 OP1-IN 10 8 CC0 OP1-OUT C30 10K 1uF R23 R15 C25 560pF R16 20K 2.7K C23 C24 R18 3K 0.01uF 10K R21 18K R17 50K 9 C28 0.1uF 0.33uF 0.33uF AGND DGND 备注：PT2399 R22=22K SC2399 R22=47K Page 3 of 5 OUTPUT 1uF 1uF 5.6K R19 C26 0.1uF C19 C27 4700pF 1 1 C17 R14 18K 100K 4.7uF R12 3 C18 560uF VCC R11 2 深圳市科信达电子有限公司 KE XIN DA Electronics Co., LTD. SC2399 Digital Sound Processor Embedded 32K SRAM Surround Mode C1 4700pF INPUT R1 VCC U1 C6 C4 0.1uF C5 4.7uF 100uF R8 Radj C13 1 VCC LPF1-IN 16 2 REF LPF1-OUT 15 3 AGND LPF2-OUT 14 4 DGND LPF2-IN 13 OP2-OUT 12 OP2-IN 11 10 5 OSC_O 6 VCO 7 CC1 OP1-IN 8 CC0 OP1-OUT C14 R2 20K 10K C3 560uF C2 100K 4.7uF R4 18K R5 C7 1uF 2.7K C8 560pF OUTPUT R6 18K C9 R7 C10 0.1uF R3 0.01uF 10K R9 20K 9 C12 0.1uF C11 4700pF 0.33uF 0.33uF AGND DGND Note: “Radj” Value con set delay time. R/delay time Reference on Resistance/ Delay Time Table. Resistance/Delay Time Table FCK 2.0M 2.5M 3.0M 3.5M 4.0M 4.5M 5.0M 5.5M Radj 53.40K 47.97K 33.41K 28.18K 24.00K 20.90K 18.20K 16.00K TD 264ms 226ms 174ms 150ms 130ms 117ms 106ms 95.2ms THD+N% 1.29% 0.95% 0.73% 0.57% 0.48% 0.41% 0.37% 0.33% FCK 6.0M 6.5M 7.0M 7.5M 8.0M 8.5M 9.0M 10M Radj 14.50K 12.90K 11.60K 10.70K 9.72K 9.07K 8.07K 6.98K TD 89ms 80.8ms 74.8ms 70.4ms 65.2ms 62.4ms 57.6ms 52.4ms THD+N% 0.29% 0.28% 0.25% 0.24% 0.22% 0.22% 0.21% 0.18% FCK 11M 12M 13M 14M 15M 16M 17M 18M Radj 5.99K 5.30K 4.52K 4.02K 3.48K 3.08K 2.64K 2.30K TD 47.6ms 44.2ms 40.2ms 37.6ms 35.0ms 33.0ms 30.8ms 29.0ms THD+N% 0.17% 0.15% 0.14% 0.14% 0.14% 0.14% 0.14% 0.14% FCK 19M 20M 21M 22M Radj 2.16K 1.89K 1.69K 1.49K TD 27.8ms 26.2ms 25.0ms 24.0ms THD+N% 0.14% 0.14% 0.14% 0.14% Note: This Table is for Surround Mode. R=Extend Resister for adjust FCK&TD FCK=Oscillate output Frequency for pin 5.(Unit:MHz) TD=Delay Time for output. THD=Total Harmonic Distortion.(TDH+N Ratio%) Page 4 of 5 深圳市科信达电子有限公司 KE XIN DA Electronics Co., LTD. SC2399 Digital Sound Processor Embedded 32K SRAM 5ms 2 .0 VP P 2 VD C 5ns 1HZ Pulse Clock Waveform for input Pin IC Package SC2399AB 16-DIP Unit: mm Page 5 of 5