S5T3170 Datasheet (Samsung semiconductor)

S5T3170, LOW POWER DTMF RECEIVER

Pin No 1 2 3 4 5 6 Symbol IN + IN * GS VREF IIN PDN Description Non inverting input of the internal amp.

Inverting input of the internal amp.

Gain Select.

The output used for gain adjustment of analog input signal with a feedback resistor.

Reference Voltage output (VDD/2, Typ) can be used to

LOW POWER DTMF RECEIVER S5T3170 INTRODUCTION The S5T3170 is a complete Dual Tone Multiple Frequency (DTMF) receiver that is fabricated by low power CMOS and the SwitchedCapacitor Filter technology.

This LSI consists of band split filters, which separates counting section which verifies the frequency and duration of the received tones before passing the corresponding code to the output bus.

It decodes all 16 DTMF tone pairs into a 4bits digital code.

The externally required components are minim

S5T3170 Features

* Detects all 16 standard tones. Low power consumption: 15mW (Typ) Single power supply: 5V Uses inexpensive 3.58MHz crystal Three state outputs for microprocessor interface Good quality and performance for using in exchange system P