HTB Datasheet, HTB Holtek DTMF Generators Datasheet, buy HTB DTMF IC. serial mode whereas the HTB contains a selectable serial/parallel mode interface for various applications such as security systems. HTA/HTB DTMF Generator With Serial Interface Features. Operating voltage: V~V Serial mode for the HTA Serial/parallel mode for the.

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I have searched the internet far and wide for the past few days and I have come up blank.

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Holtek reserves the right to alter its products without prior notification. It has a serial and a paralell interface. As for the control timing diagram, see Figure 2.

Thus, these data input pins should not float. Additional supplementary information with regard to packaging is listed below. The relationship between the digital codes and the tone output frequency is illustrated in Table 2. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package information.

Actually, I think it may be a little complex to use serial mode after viewing this document. Read times previous topic – next topic. Would I just connect the data pin of the IC to the pin 1 of my arduino to send the serial data to it? I’d really appreciate your help on this.

I have these working so on to my next problem. I think the serial interface would suit perfectly with the arduino but I may be wrong. Dimensions in mm Min.


I don’t think this is the ideal IC for your purpose, because it’s set up to receive inputs from a key numeric pad. To get it to work, you’ll have to get the arduino to mimic the electrical behavior caused by the capacitance change that happens when you press one of those buttons.

Below is a datasheet for my IC and I have spent many hours trying to get this to work I promise to post start a build log for my alarm as soon as I know I can do it These are stress ratings only. Thanks for any insight. I know I’ve seen threads from other people trying to interface Arduino to DTMF, maybe there’s a solution out there that you could adapt.

When the IC is operating in the serial mode, this pin becomes floating. I’m probably doing everything wrong as I am more of a programmer than electronic eng. Here is some code I wrote for that chip. Both modes produce the same basic tone pairs for digital dialing, corresponding to the keys: As for the control timing diagram, refer to Figure 1.

Then the input data codes should be determined. However, Holtek assumes no responsibility arising from the use of the specifications described. Click on the relevant section to be transferred to the relevant website page.

HT9200B Datasheet PDF

When the IC is operating in the parallel mode, these pins become floating. The information appearing in this Data Sheet is believed to be accurate at the time of publication. X Y Pad No. X Y 1 The applications mentioned herein are used solely for the datasheey of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise.


I am currently building a burglar alarm with 2 PIR sensors from sparkfun. He recommends Holtek B. Every digit of a phone number to be transmitted is selected by a series of inputs which consist of 5-bit data. I think what you want is an Adtasheet that takes something the arduino can talk to easily, like serial, i2c, etc.

The oscillator function can be implemented by Connect a standard 3.

Still no tutorials however. BroHogan God Member Posts: Thanks in advance for any help. For the most up-to-date information, please visit our web site at http: Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Ah, I took another look at the datasheet and you’re right.

Hi Guys, I just received my Arduino in the post a few days ago and have been having great fun with it. The relationship between the digital codes and the tone output frequency is shown in Table 1.