lingxingic HT9170D(LX)

HT9170 is a complete DTMF receiver circuit featuring band-split filtering and digital decoding. The filter section employs switched-capacitor technology to separate dial tone signals into high-group and low-group signals. Digital counting techniques are used in the decoder to detect all 16 DTMF tone pairs and encode them into 4-bit codes. A differential input amplifier, clock oscillator, and tri-state latched bus interface are integrated on-chip, minimizing the number of external components. This circuit is a mixed-signal CMOS design, implemented with 1.2μm double-layer polysilicon single-layer aluminum design rules, with a die area (excluding scribe lines) of 2.966×1.697mm².

• 3.57954MHz crystal or clock input
• Superior performance
• CMOS single 5V supply operation
• Minimal PCB footprint
• Low power consumption
• Power-saving mode
• Inhibit mode
• Built-in switched-capacitor filter
• Package: DIP18 / SOP18