S5T3170 Datasheet, PDF (1/10 Pages) Samsung semiconductor – LOW POWER DTMF RECEIVER

LOW POWER DTMF RECEIVER
INTRODUCTION
The S5T3170 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 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 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 crystal as an external component.
18−DIP−300A
20−SOP−375
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
ORDERING INFORMATION
Device
S5T3170X01-D0B0
S5T3170X01-S0B0
Package
18−DIP−300A
20−SOP−375
Operating
− 25°C — + 75°C
APPLICATIONS
• PABX
• Central Office
• Paging Systems
• Remote Control
• Credit Card Systems
• Key Phone System
• Answering Phone
• Home Automation System
• Mobile Radio
• Remote Data Entry
S5T3170
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