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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Below is a datasheet for my IC and I have spent many hours trying to get this to work Every digit of a phone number to be transmitted is selected by a series of inputs which consist of 5-bit data.

When the IC is operating in the serial mode, this pin becomes datasbeet.

I’m probably doing everything wrong as I am more of a programmer than electronic eng. Hi Guys, I just received my Arduino in the post a few days ago and have been having great fun with it.

X Y Pad No.

Both modes produce the same basic tone pairs for digital dialing, corresponding to the keys: 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. I’d really appreciate your help on this.

The applications mentioned herein are used solely for the purpose 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.


The oscillator function can be implemented by Connect a standard 3. Holtek reserves the right to alter its products without prior notification.

HTB datasheet, Pinout ,application circuits HTA/HTB — DTMF Generators

I have these working so on to my next problem. Actually, I think it may be a little ht99200b to use serial mode after viewing this document. I have searched the internet far and wide for the past few days and I have come up blank. Here is some code I wrote for that chip.

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 datassheet. It has a serial and a paralell interface. He recommends Holtek B. As for the control timing diagram, see Figure 2.

HT9200B Datasheet PDF

Thus, these data input pins should not float. Thanks in advance for any help. BroHogan God Member Posts: However, Holtek assumes no responsibility arising from the use of the specifications described. Would I just connect the data pin of the IC to the pin 1 of my arduino to send the serial data to it? Then the input data codes should be determined.

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. 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.

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. Additional supplementary information with regard to packaging is listed below. For the most up-to-date information, please visit our web site at http: I think what you want is an IC that takes something the arduino can talk to easily, like serial, i2c, etc.


These are stress ratings only. As for the control timing diagram, refer to Figure 1. I promise to post start a build log for my alarm as soon as I know I can do it The relationship between the digital codes and the tone output frequency is illustrated in Table 2.

I am currently building a burglar alarm with 2 PIR sensors from sparkfun. X Y 1 Thanks for any insight. Read times previous topic – next topic.

I think the serial interface would suit perfectly with the arduino but I may be wrong. Click on the relevant section to be transferred to the relevant website page. Ah, I took another look at the datasheet and you’re right.

The relationship between the digital codes and the tone output frequency is shown in Table 1. The information appearing in this Data Sheet is believed to be accurate at the time of publication. When the IC is operating in the parallel mode, these pins become floating. Dimensions in mm Min. Still no tutorials however.