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參數(shù)資料
| 型號： | HT9200B |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | DTMF Generators |
| 中文描述： | 雙音多頻發(fā)電機 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 282K |
| 代理商： | HT9200B |
Table 2: Digits vs. input data vs. tone output frequency (parallel mode)
Digit
1
2
3
4
5
6
7
8
D3
0
0
0
0
0
0
0
1
D2
0
0
0
1
1
1
1
0
D1
0
1
1
0
0
1
1
0
D0
1
0
1
0
1
0
1
0
Tone Output F requency (Hz)
697
+
1209
697
+
1336
697
+
1477
770
+
1209
770
+
1336
770
+
1477
852
+
1209
852
+
1336
When the system is operating in the serial mode
a pull-high resistor is attached to D0~D3 (for
parallel mode) on the input terminal.
For the HT9200B, the S/P pin has to be connected
low for serial mode operation.
Parallel mode ( HT9200B)
The HT9200B provides four data inputs D0~D3
to generate their corresponding DTMF signals.
The S/P has to be connected high to select the
parallel operation mode. Then the input data
codes should be determined. Finally, the CE is
connected low to transmit the DTMF signal
from the DTMF pin.
The T
DE
time (about 6ms) will be delayed from the
CE falling edge to the DTMF signal output.
The relationship between the digital codes and
the tone output frequency is illustrated in Table 2.
As for the control timing diagram, see Figure 2.
When the system is operating in the parallel
mode, D0~D3 are all in the floating state. Thus,
these data input pins should not float.
Figure 1
HT9200A/B
6
21st Aug ’98
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT9202A | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9202B | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9202C | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9202D | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9202F | 1-Memory/2-Memory Tone/Pulse Dialer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT9200B(14DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| HT9200B(14SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| HT9200B-14SOP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| HT9200B-14SOPLF | 制造商:Holtek Semiconductor Inc 功能描述:IC DTMF GENERATOR SMD SOP14 制造商:HOLTEK 功能描述:IC, DTMF GENERATOR, SMD, SOP14 制造商:Holtek Semiconductor Inc 功能描述:IC, DTMF GENERATOR, SOP-14; IC Function:DTMF Generator; Brief Features:Low Standby Current, Low Total Harmonic Distortion, 3.58MHz Crystal or Ceramic Resonator; Supply Voltage Min:2.5V; Supply Voltage Max:5.5V; No. of Pins:14 ;RoHS Compliant: Yes |
| HT9201A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
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