Серия DTMF контроллеров HT9170

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	Раздел	DTMF контроллеры
	Тип по назначению

Документация на серию HT9170

HT9170B/HT9170D DTMF Receiver Features · Operating voltage: 2.5V~5.5V · Tristate data output for MCU interface · Minimal external components · 3.58MHz crystal or ceramic resonator · No external filter is required · 1633Hz can be inhibited by the INH pin · Low standby current (on power down mode) · HT9170B: 18-pin DIP package HT9170D: 18-pin SOP package · Excellent performance 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 Operating Voltage OSC Frequency Tristate Data Output Power Down 1633Hz Inhibit DV DVB Part No. HT9170B 2.5V~5.5V 3.58MHz Ö Ö Ö Ö ¾ 18 DIP HT9170D 2.5V~5.5V 3.58MHz Ö Ö Ö Ö ¾ 18 SOP Package Block Diagram P W D N V R E F B ia s C ir c u it V re f G e n e ra to r R T /G T E S T D V D V B X 2 X 1 V P V N G S 3 .5 8 M H z C ry s ta l O s c illa to r S te e r in g C o n tr o l C ir c u it L o w G ro u p F ilte r O P A F re q u e n c y P r e - F ilte r D e te c to r H ig h G r o u p F ilte r C o d e D e te c to r D 0 D 1 D 2 D 3 IN H Rev. 1.11 L a tc h & O u tp u t B u ffe r 1 O E February 23, 2009  PDF

Документация на серию HT9170 

HT9170B/HT9170D - DTMF Receiver

Дата модификации: 24.12.2011

Размер: 130.4 Кб

14 стр.

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Товары серии HT9170