BL0305 Digital Echo (Digital Delay) Description The BL0305 is a CMOS IC for generating echo to be added to the voice through a “karaoke” microphone. It is designed for the lowest price of models in the same series,and is suitable for application to the echo generator of a radio cassette player, minicomponent stereo set, TV etc. Increased master clock frequency assures highperformance short delay, enabling the IC to be used for digital surround ( Compatible with M65844P). LPF1 IN LPF1 OUT OP1 OUT OP1 IN CC1 CC2 GND 1 2 3 4 5 6 7 BL0305 Pin Assignment 14 13 12 11 10 9 8 VCC CLOCK REF OP2 IN OP2 OUT LPF2 IN LPF2 OUT DIP 14 Pin Features ・All functions necessary for generating digital echo are contained, enabling production of low-priced echo generator. ・C-R oscillation circuit is provided for a master clock, ・Built-in auto power-on reset circuit. ・No control signal is required. ・Delay time=150msec(with master clock set at 220 kHz) ・14-pin DIP package.(14PDIP) Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233 BL0305 Digital Echo (Digital Delay) Application KARAOKE, TV, VCR. Radio-Cassette Tape Recorder etc. C1 1µ C3 0.01µ C16 47µ R2 16K R3 16K C15 0.1µ 1 LPF1 IN R4 30K C2 510p C4 1µ VR1 50K C5 0.1µ CLOCK 13 3 OP1 OUT REF 12 OP2 IN 11 5 CC1 C7 0.22µ 14 2 LPF1 OUT 4 OP1 IN C6 0.22µ V CC BL0305 + OP2 OUT 10 6 CC2 LPF2 IN 7 GND LPF2 OUT 8 R11* 47K C14 100p + C13 47µ C12 0.1µ R9 16K 9 R10 16K C11 0.01µ R8 16K C10 0.0022µ + C8 1µ Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233