Holtek HT9170D 18SOP DTMF Receiver

DTMF receiver, 2.5V to 5.5V supply voltage, 10uA standby current, 3.58MHz system frequency, 3mA operating current, 2.5mA output drive current, 100kR pull high resistance, -20 to +75°C, 18-SOP case, the HT9170B/D are dual tone multi frequency (DTMF) receivers integrated with digital decoder and band split 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, minimal external components, no external filter is required, low standby current, excellent performance, tristate data output for MCU interface.