lc75412e Sanyo Semiconductor Corporation, lc75412e Datasheet - Page 20

• Manufacturer Part Number: lc75412e
• Description: Electronic Volume Controller For Car Audio Systems
• Manufacturer: Sanyo Semiconductor Corporation

(5) Cautions related to serial data transfer
(6) Note on usage of external muting
1. To ensure that the high-frequency digital signals transferred to the CL, DI, and CE pins do not spill over to the
2. The data format of the LC75412E and 75412W uses 8-bit addresses and 44-bit data. When sending data using
When using external mute function, take adequate countermeasures against noise to prevent malfunction.
--10
--20
--30
--40
--50
--60
10
20
15
10
5
0
0
10
0
analog signal block, either guard these signal lines with a ground pattern, or perform transmission using shielded
wires.
multiples of 8 (when sending 48 bits), use the method described in Figure 1.
Method for Receiving Data Using Multiple of 8 of LC75412E and 75412W
V
V
f = 1 kHz
Overall
V
Loudness ON, Overall
DD
IN
DD
X
2 3
= –20 dBV
2
= 9 V
= 9 V, V
Input Gain Step Characteristics
Dummy data
5 7
4
X
Loudness Characteristics
100
IN
6
= 0, V
2 3
X
Frequency, f — Hz
8
Step setting
R
5 7
= 0 to –54 dB
X
10
1k
Input switching control
2 3
D0
12
5 7
14
D1
10k
16
2 3
D2
ILC05454
ILC05456
18
5 7
LC75412E, 75412W
D3
100k
20
Figure 1
--100
--10
--20
--30
--40
--50
--60
--10
--20
--30
--40
--50
--60
--70
--80
--90
10
D36
0
0
--
10
V
V
f = 1 kHz
Overall
DD
IN
2 3
Test mode control
D37
= 0
--70
= 9 V
Output Level Characteristics
5 7
Feder Step Characteristics
D38
100
--60
2 3
V
Overall
Frequency, f — Hz
Step setting — dB
D39
--50
DD
= 9 V, V
5 7
--40
D40
1k
IN
2 3
--30
= 0, V
D41
5 7
X : don’t care
R
10k
--20
D42
= 0 to –54 dB
2 3
No. 7053-20/21
--10
ILC05455
ILC05457
D43
5 100k
7
0