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BL0306 Digital echo
Description The BL0306 is a digital ECHO IC fabricated with silicon gate CMOS technology . The BL0306 converts an input analog signal to a digital signal and writes it into a memory IC,After a delay it reads out the digital signal from the memory IC and then converts to an analog signal again. Lower noise and distortion delay signal is obtained by BL0306 than by BBD. An A-D, D-A converter block formed of ADM (Adaptive Delta Modulation) circuit can produce a low-cost delay system.(compatible with M50915P)
Pin Assignment A6 MDI CAS RESET DO W RAS A0 A2 A1 A7 A5 A4 A3 D-GND CC1 CC2 SHORT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 VCC LPF2 OUT2 LPF2 OUT1 LPF2 IN1 LPF2 IN2 OP2 OUT OP2 IN A-GND LPF1 IN LPF1 OUT OP1 OUT OP1 IN REF OSC IN OSC OUT LONG MIDD CDI
PDIP 36Pin
Features Low noise(-90dBV typ.) Low distortion(0.5% typ.) 3 mode delay time (100,150,200ms) Includes auto mute circuit to protect sound from digital noise caused by delay time mode change or power on.
Address
No.810, YiShan Road ShangHai China Tel
BL0306
86-021-64850700 Fax
86-64852222 Zip.200233
BL0306 Digital echo
Application Karaoke, Radio cassette tape recorder, Videodisc plaver.
NP IN 1 + Feed back SW 0.1 + Vcc 6800p 20K + 1 33K 4.7 1800p 10K 2.2K 51K 0.1 680p 15p 0.01
Compator M5233L or equal 20K 500 SL 1M 500 SM 47 + 27p 20K 27p 4MHz
47
0.1*
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
1
2
3
4
10K 1 +
5
6
7
8
9
10
11
12
13
14
15
16
0.1
17
0.1
18
Ss 500
0.1
20K
1 NC
2 D
3 W
4 5 RAS A0 A6 13 A3 12
6 A2 A4 11
7 A1 A5 10
8 VDD A7 9 64K Bit or 256K Bit D-RAM (f.e. M5K4164ANP)
VSS CAS Q 16 15 14
Address
No.810, YiShan Road ShangHai China Tel
86-021-64850700 Fax
86-64852222 Zip.200233

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