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HT9170B

Holtek Semiconductor Inc
Part Number HT9170B
Manufacturer Holtek Semiconductor Inc
Description DTMF Receiver
Published Mar 26, 2005
Detailed Description www.DataSheet4U.com HT9170B/HT9170D DTMF Receiver Features · Operating voltage: 2.5V~5.5V · Minimal external components...
Datasheet PDF File HT9170B PDF File

HT9170B
HT9170B

Overview
www.
DataSheet4U.
com HT9170B/HT9170D DTMF Receiver Features · Operating voltage: 2.
5V~5.
5V · Minimal external components · No external filter is required · Low standby current (on power down mode) · Excellent performance · Tristate data output for MCU interface · 3.
58MHz crystal or ceramic resonator · 1633Hz can be inhibited by the INH pin · HT9170B: 18-pin DIP package HT9170D: 18-pin SOP package General Description The HT9170B/D are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions as well as power-down mode and inhibit mode operations.
Such devices use digital counting techniques to detect and decode all the 16 DTMF tone pairs into a 4-bit code output.
Highly accurate switched capacitor filters are implemented to divide tone signals into low and high group signals.
A built-in dial tone rejection circuit is provided to eliminate the need for pre-filtering.
Selection Table Function Part No.
HT9170B HT9170D Operating Voltage 2.
5V~5.
5V 2.
5V~5.
5V OSC Frequency 3.
58MHz 3.
58MHz Tristate Data Output Ö Ö Power Down Ö Ö 1633Hz Inhibit Ö Ö DV Ö Ö DVB ¾ ¾ Package 18 DIP 18 SOP DataShee Block Diagram P W D N X 2 X 1 3 .
5 8 M H z C ry s ta l O s c illa to r B ia s C ir c u it DataSheet4U.
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R T /G T E S T D V D V B V re f G e n e ra to r S te e r in g C o n tr o l C ir c u it L o w V P V N G S O P A P r e - .
ilte r G ro u p .
ilte r .
re q u e n c y D e te c to r C o d e D e te c to r H ig h G r o u p .
ilte r L a tc h & O u tp u t B u ffe r D 0 D 1 D 2 D 3 IN H O E Rev.
1.
10 1 September 24, 2002 DataSheet4U.
com DataSheet 4 U .
com www.
DataSheet4U.
com HT9170B/HT9170D Pin Assignment V P 1 2 3 4 5 6 7 8 9 V N G S V R E .
IN H P W D N X 1 X 2 V S S 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 V D D R T /G T E S T D V D 3 D 2 D 1 D 0 O E V P 1 2 3 4 5 6 7 8 9 V N G S V R E .
IN H P W D N X 1 X 2 V S S 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 V D D R T /G T E S T D V D 3 D 2 D 1 D 0 O E H T 9 1 7 0 B 1 8 D I...


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