RF5C68A

The RF5C68A is a kind of sound generator IC that uses pulse code modulation (PCM). It has a digital control oscillator (DCO) and digital control amplifier (DCA) built in. You can structure a PCM sound generator system by connecting external waveform data memories (pseudo SRAM, SRAM, or mask ROM) and D/A converters, controlling them with a microcomputer. The typical applications include sound generators for personal computers, electronic instruments, TV games, and toys.

There are some features of RF5C68A as follows: (1)PCM sound generation method; (2)number of channels: 8; (3)source clock frequency: 10 MHz max; (4)sampling frequency: 19.8 kHz (source clock=7.6 MHz); (5)waveform data width: 8 bits; (6)number of waveform words: any; (7)waveform memory space: 64 K-bytes max; (8)envelope data width: 8 bits; (9)left (L) and right (R) stereo output at arbitrary orientation level; (10)pitch fine adjustment; (11)interface with 8-bit CPUs; (12)silicon gate CMOS process; (13)5 V single power supply; (14)package: 80-pin flat package.

The following is about the absolute maximum ratings of RF5C68A: (1)VCC, supply voltage: -0.3 to 7 V when GND=0 V; (2)VTE, input and output voltage: -0.3 to VCC+0.3 V when GND=0 V; (3)Pd, maximum power consumption: 200 mW; (4)Topr, operating ambient temperature: 0 to 70; (5)Tstg, storage temperature: -40 to 125. Then is about the recommended operating conditions: (1)VCC, supply voltage: 4.5 V min and 5.5 V max; (2)VIH, input high voltage: 2.2 V min and VCC+0.3 V max; (3)VIL, input low voltage: -0.3 V min and 0.8 V max; (4)Ta, ambient temperature: 0 to 70.