Summary
AK2347, in addition voice filter, limiter, to splatter filter, emphasis, compander, scrambler circuit,
Has a built-in programmable LPF for CTCSS, is an IC with a single chip the baseband section of the radio. HPF of the audio filter, reliable sub-audio signals, such as CTCSS shows a high attenuation rate below 250Hz To achieve the removal. Also limiter circuit, it is possible to adjust the limit level by connecting a resistance to external.

FEATUREs
□ in addition to voice filter, internal limiter, an audio signal processing circuit such as splatter filter
□ emphasis, compander, scrambler circuit built-in (3.388kHz, 3.290kHz)
□ CTCSS programmable LPF built-in
□ oscillation circuit built by the quartz oscillator (3.6864MHz, 3.579545MHz)
□ operating voltage range: 2.7V ~ 3.3V
□ operating temperature range: -40 ℃ ~ + 85 ℃
□ low consumption by CMOS process current
□ adopt a plastic small package: 24-pin VSOP