KT3170 Datasheet, PDF (1/7 Pages) Samsung semiconductor – LOW POWER DTMF RECEIVER

KT3170
LOW POWER DTMF RECEIVER
INTRODUCTION
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
• 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
• Power down mode/input inhibit
APPLICATIONS
• PABX
• Central Office
• Paging Systems
• Remote Control
• Credit Card Systems
• Key Phone System
• Answering Phone
• Home Automation System
• Mobile Radio
• Remote Data Entry
18-DIP-300A
ORDERING INFORMATION
Device
KT3170N
Package
18-DIP-300A
Operating
- 25°C ~ + 75°C
PIN CONFIGURATION
IN+ 1
IN- 2
GS 3
4 VREF
IIN 5
PDN 6
OSC1 7
OSC2 8
GND 9
KT3170
18 VDD
17 SI/GTO
16 ESO
15 DSO
14 Q4
13 Q3
12 Q2
11 Q1
10 OE
Fig. 1