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DTMF Tone Generator IC : LC7366 　　　

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No.　　　 65 　　　
Kit / Parts 　　　 Parts set 　　　
Class. 　　　 Accessories　　　
Part Name 　　　 DTMF tone generator LC7366  　　　
Shop　　　 IC manufacturer : SANYO Co.,Ltd.

Parts Shop : Akizuki Denshi Tsusho Ltd.

E-mail : akizuki@ains.tomakomai.or.jp

This Parts Set is got in Japan. At another country, it is very difficult to get this.
Price 　　　 500 yen

( 500 yen is about $4.5, One dollar at the time of 110 yen.) 　　　
Main part 　　　 LC7366 　　　
The power supply 　　　 2.5〜10VDC 16mA 　　　
Outline specification　　　 　
Key for the push telephone handsets　　　 :　　　 0〜9, #, A, B, C and D　　　
Control Output　　　 :　　　 MUTE output , XMIT output　　　
Oscillation frequency error　　　 :　　　 within ±1%　　　
Attached parts 　　　 :　　　 X'tal 3.579545MHz : 1 piece
Push button SW for the Print circuit board : 12 pieces　　　
OSC output current 　　　 :　　　 Vcc 2.5V: VOL=0.5V IOL=0.18mA min
                  VOH=2.0V IOH=0.13mA min

Vcc 10V: VOL=0.5V IOL=0.8mA min
                 VOH=9.5V IOH=0.42mA min　　　

　
Print Circuit Board　　　 -　　　
Case 　　　 -　　　
Size 　　　 DIP 16pin　　　
Additional parts 　　　 SW diodes (1S1588 1SS252 etc. , General purpose SW diodes) 24 pieces

Resistance 10kohm 8 pieces

Piezoelectricity speaker 1 piece

Universal print circuit board 1 piece

Capacitor 0.1uF  1 piece　　　
Comment 　　　 OSC output current
  • Vcc 2.5V: VOL=0.5V IOL=0.18mA min

VOH=2.0V IOH=0.13mA min

  • Vcc 10V: VOL=0.5V IOL=0.8mA min

VOH=9.5V IOH=0.42mA min

　

You can read the English Datasheet of this IC by the following procedure. You need Adobe Acrobat Reader installed on your system to read a datasheet.

  1. Type "http://www.semic.sanyo.co.jp/index_e.htm" in the URL/Location Box of your browser.

  2. "Sanyo Semiconductor" Top Page is opened.  (Ref. Fig.1)

sanyo_a.gif (42545 バイト)

Fig.1 Top Page

  1. Move Cursor to "PRODUCT" TAB which is at the lower position of this frame.
    Then "data sheet" box is appeared. (Ref. Fig.1)

  2. Click "data sheet" box. (Ref. Fig.1)

  3. New page is opened. "OK" is displayed to the end of this frame.
    Click this "OK". (Ref. Fig.2)

sanyo_b.gif (29897 バイト)

Fig.2

  1. The "data sheet" frame is opened at the left side. (Ref. Fig.3)

sanyo_c.gif (63008 バイト)

Fig.3

  1. Type "LC7366" in the "Type Num.(keyword location) " Box. (Ref. Fig.3)

  2. Click "SEARCH" button. (Ref. Fig.3)

  3. The result frame is displayed at the right side. (Ref. Fig.4)

lc7366_2.gif (49126 バイト)

Fig.4

　

  1. If you want to read the English datasheet, Click "2889". (Ref. Fig.4)

  2. The datasheet is displayed at the right side. (Ref. Fig.5)

lc7366_3.gif (60417 バイト)

Fig.5

  　　　
Modify 　　　 - 　　　
Example 　　　

 

Fig.1 Parts Set

　

Fig.2 Example

Fig.2 is shown the example circuit board of this parts set.   Piezo-ringer KBT-33SB-2T-2 (KYOCERA CORP.) is used instead of the Piezo speaker. This frequency characteristic is not matching the required specification of this IC. But, the PIC DTMF Decoder Kit( Japanese web page) can decode this Piezo-ringer's output sound.

Table 1 is shown the button arrangement on the fig.2. Table2 is shown the current consumption at operating mode. If no button is pushed, the current consumption is about 90 micro amperes at 9.0Vdc.

Table 1 button arrangement
1 　　　 2 　　　 3 　　　
4 　　　 5 　　　 6 　　　
7 　　　 8 　　　 9 　　　
* 　　　 0
(A green button) 　　　		 # 　　　

　

Table 2 Current consumption at operating mode
Power supply voltage [V] 　　　 Current consumption[mA] 　　　
3.0 　　　 2.92 　　　
4.0 　　　 4.55 　　　
5.0 　　　 6.16 　　　
6.0 　　　 7.88 　　　
7.0 　　　 9.63 　　　
8.0 　　　 11.42 　　　
9.0 　　　 13.23 　　　
  　　　

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