Audio chip recorder IC has DTMF and FSK

Nuvoton Technology Corp has introduced a ChipCorder voice/audio IC that enables telephony functions.  The new ChipCorder® ISD61S00 provides a digital-audio interface, audio storage interface, macro-scripting ability, and streamlined programmability that allow designers to develop telephony-based systems with audio prompting, multi-language options, and fast, address-free recording and playback of up to 64 minutes. The ISD61S00 helps system designers create a wide range of non-PC communication platforms, such as personal emergency response systems (PERS), docking stations, home security systems, point-of-sale (POS) terminals, telephone answering devices (TADs) and vending machines. Operating from 2.7V to 3.6V, the IC can detect and generate both dual-tone multi-frequency (DTMF) signaling and frequency-shift keying (FSK)  for  Bell 103, Bell 202 or V.23 modem. Power dissipation is 0.5W.

The ISD61S00 audio recorder IC can generate and detect DTMF and FSK telephony signals.

Additionally, the chip features a public switched telephone network (PSTN) interface, a customer alert signal (CAS) detector, CPT (call progress tone) detection, and ring detection. You system’s audio quality is enhanced by the parts echo-cancellation feature and pulse-code modulation/inter-IC sound (PCM/I2S) digital audio interface.  You access the chip’s 16 general-purpose I/O (GPIO) pins through its serial peripheral interface (SPI) ports.  The ISD61S00 enables dial-out alerts via residential telephone lines. The part has dual CODECs, providing connections to direct access arrangements (DAAs), speakers and microphones. The CODECs have sampling frequencies up to 16kHz. The signal-to-noise ratio is 90dB.

The ISD61S00, available in a 48-pin LQFP package, is sampling now, with production scheduled for Q3 2010, at $3.00 in 10K quantities. 

A typical system using the ISD61S00 requires the addition of a data access arrangement (DAA) to provide isolation, a clock, and serial flash memory.