HT9170D

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.com V R E . 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...