KT3170
LOW POWER DTMF RECEIVER
INTRODUCTION
18-DIP-300A
The KT3170 is a complete Dual Tone Multiple Frequency
(DTMF) receiver that is fabricated by low power CMOS
and the Switched-Capacitor Filter technology.
This LSI consists of band split filters, which seperates
counting section which verifies the frequency and
duration of the received tones before passing the cor-
responding code to the output bus. It decodes all 16
DTMF tone pairs into a 4bits digital code.
The externally required components are minimized by
on chip provision of a differential input AMP, clock
oscillator and latched three state interface. The on chip
clock generator requires only a low cost TV cystal as
an external component.
FEATURES
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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
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Power down mode/input inhibit
ORDERING INFORMATION
Device
KT3170N
Package
18-DIP-300A
Operating
- 25°C ~ + 75°C
APPLICATIONS
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PABX
Central Office
Paging Systems
Remote Control
Credit Card Systems
Key Phone System
Answering Phone
Home Automation System
Mobile Radio
Remote Data Entry
PIN CONFIGURATION
IN+
1
2
3
4
5
6
7
8
9
KT3170
18
17
16
15
14
13
12
11
10
V
DD
IN-
SI/GTO
GS
ESO
V
REF
DSO
I
IN
Q4
PDN
Q3
OSC1
Q2
OSC2
Q1
GND
OE
Fig. 1
SAMSUNG [ SAMSUNG SEMICONDUCTOR ]
