Voice/audio IC enables telephony-based systems

Voice/audio IC enables telephony-based systems

The ChipCorder ISD61S00 voice/audio IC provides a digital-audio interface, audio storage interface, powerful macro-scripting ability, and streamlined programmability that allow designers to develop telephony-based systems with audio prompting, multilanguage options, and fast, address-free recording and playback of up to 64 min. Operating from 2.7 to 3.6 V, the part can perform a range of telephony-based communications functions, such as the detection and generation of both dual-tone multifrequency signaling and frequency-shift keying (FSK) for Bell 103, Bell 202, or V.23 modem.

Additionally, the chip features a public switched telephone network interface, a customer-alert-signal detector, call-progress-tone detection, and ring detection. A system’s audio quality is enhanced by the ISD61S00’s echo-cancellation feature and pulse-code modulation/inter-IC sound digital audio interface. Housed in a 48-pin LQFP package, the part also features dual codecs, sampling frequencies up to 16 kHz, an SNR of 90 dB typ, a power dissipation of 0.5 W max, and record and playback compression. ($3 ea/10,000 — samples available now; prod qty, 3rd qtr.)

Nuvoton Technology , San Jose , CA
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