HT8955A

Supply Voltage ................................0.3V to 6V
Input Voltage................. V_SS0.3V to V_DD+0.3V
Storage Temperature................ 50 to 125
Operating Temperature............... 20 to 70

*Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings" may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

The HT8955A is a CMOS LSI digital audio signal delay processor. It is designed for audio system applications including echo generators, karaoke systems, sound effect generators, etc.

 The chip consists of a built-in pre-amplifier, on-chip oscillator, DRAM interface, 10-bit A/D and D/A converters as well as control logic. It provides continuously adjustable delay time up to 0.8/0.2 seconds at a sampling rate of 25kHz when combined with an external DRAM (41256/4164). The HT8955A is superior to a conventional BBD delay unit in its low distortion, high S/N ratio and long delay time. Its sophisticated low pass filter will not end in the normal applications due to the high sampling rate (25~50kHz). Hence, the HT8955A is excellent for audio delay system applications. It is offered in a 24-pin dual-in-line package.