HT9200A-8SOPLF HOLTEK, HT9200A-8SOPLF Datasheet - Page 5

• Manufacturer Part Number: HT9200A-8SOPLF
• Description: IC, DTMF GENERATOR, SOP-8
• Manufacturer: HOLTEK

Specifications of HT9200A-8SOPLF

• Supply Voltage Range: 2.5V To 5.5V
• Operating Temperature Range: -20°C To +75°C
• Digital Ic Case Style: SOP
• No. Of Pins: 8
• Termination Type: SMD
• Operating Temperature Min: -20°C
• Package / Case: 8-SOP
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Operating Temperature Max: 75°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Description
The HT9200A/B are DTMF generators for MCU inter-
faces. They are controlled by a MCU in the serial mode
or the parallel mode (for the HT9200B only).
Serial Mode (HT9200A/B)
The HT9200A/B employ a data input, a 5-bit code, and a
synchronous clock to transmit a DTMF signal. Every
digit of a phone number to be transmitted is selected by
a series of inputs which consist of 5-bit data. Of the 5
Table 1: Digits vs. Input Data vs. Tone Output Frequency (Serial Mode)
Note: The codes not listed in Table 1 are not used D4 is MSB
Rev. 1.40
DTMF OFF
Digit
A
B
C
D
1
2
3
4
5
6
7
8
9
0
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
1
5
bits, the D0(LSB) is the first received bit. The
HT9200A/B will latch data on the falling edge of the
clock (CLK pin). The relationship between the digital
codes and the tone output frequency is shown in Table
1. As for the control timing diagram, refer to Figure 1.
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.
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
1
HT9200A/HT9200B
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
1
Frequency (Hz)
Tone Output
August 30, 2004
697 1209
697 1336
697 1477
770 1209
770 1336
770 1477
852 1209
852 1336
852 1477
941 1336
941 1209
941 1477
697 1633
770 1633
852 1633
941 1633
1209
1336
1477
1633
697
770
852
941