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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The relationship between the digital codes and the tone output frequency is shown in Table 1. I’d really appreciate your help on this. Every digit of a phone number to be transmitted is selected by a series of inputs which consist of 5-bit data.

HT9200B Datasheet

As for the control timing diagram, refer to Figure 1. Both modes produce the same basic tone pairs for digital dialing, corresponding to the keys: Below is a datasheet for my IC and I have spent many hours trying to get this to work Then the input data codes should be determined.

Would I just connect the data pin of the IC to the pin 1 of my arduino to send the serial data to it? Here is some code I wrote for that chip. Ah, I took another look at the datasheet and you’re right. I think the serial interface would suit perfectly with the arduino but I may be wrong. I think what you want is an IC that takes something the arduino can talk to easily, like serial, i2c, etc.


I have these working so on to my next problem. Read times previous topic – next topic. The applications mentioned herein are used datashee 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 ht9200bb human life due to malfunction or otherwise. I am currently building a burglar alarm with 2 PIR sensors from sparkfun.

The relationship between the digital codes and the tone output frequency is illustrated in Table 2. These are stress ratings only. Thanks in advance for any help.

HT9200A/HT9200B — DTMF Generators

Additional supplementary information with regard to packaging is listed below. When the IC is operating in the parallel mode, these pins become floating.

Click datasheer the relevant section to be transferred to the relevant website page. I’m probably doing everything wrong as I am more of a programmer than electronic eng.

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I don’t think this is dataasheet ideal IC for your purpose, because it’s set up to receive inputs from a key numeric pad. 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. X Y 1 For the ht2900b up-to-date information, please visit our web site at http: I know I’ve seen threads from other people trying to interface Arduino to DTMF, maybe there’s a solution out datasheef that you could adapt.


He recommends Holtek B. Thanks for any insight. Actually, I think it may be a little complex to use serial mode after viewing this document. Thus, these data input pins should not float. The information appearing in this Data Sheet is believed to be accurate at the time of publication.

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.

As for the control timing diagram, see Figure 2. Holtek reserves the right to alter its products without prior notification.