SM8230A Datasheet, PDF (7/7 Pages) Nippon Precision Circuits Inc – Tone Dialer with Built-in Piezo Driver

SM8230A
GH/GL command (GH3 to GH0, GL3 to GL0)
These bits set the output levels of the high-frequency
group and low-frequency group outputs, respec-
tively. The input code and the corresponding output
level are shown in table 4. Note that the 0 dB point is
typically 93% of the supply voltage. Any value
above 0 dB results in amplitude clipping of the out-
put waveform.
Table 4. GH/GL command
GH3/GL
3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
GH2/GL
2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
GH1/GL
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
GH0/GL
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Output
level
−9 dB
−8 dB
−7 dB
−6 dB
−5 dB
−4 dB
−3 dB
−2 dB
−1 dB
0 dB
1 dB
2 dB
3 dB
4 dB
5 dB
6 dB
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or
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NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS INC.
4-3, 2-chome Fukuzumi
Koutou-ku, Tokyo 135-8430, Japan
Telephone: [phone]
Facsimile: 03-3642-6698
NC9614BE 1997.01
NIPPON PRECISION CIRCUITS—7