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Part Number: UPD7759
Description: The PD7759 is an external ROM type speech synthesis LSI employing the waveform coding method. In...
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UPD7759
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DataSheet
General Description
UPD7759 General Description
The PD7759 is an external ROM type speech synthesis LSI employing the waveform coding method. In addition to the ROM capability of up to 1 Mbit, the PD7759 realizes the synthesis of speech sounds of any length by using the ADPCM data transferred from an external ROM.
As the synthesizing method, it adopts the ADPCM method and the PCM + waveform element method.The ADPCM method is suitable for synthesizing clear and natural speech sounds, and the PCM + waveform element method is for the synthesis of sound effects and melodies. And by using them together, the PD7759 realizes the long-time synthesis of high-quality sounds.
Because of the short turn-around time of speech analysis, the PD7759 can perform the quick system development using a PROM, or the evaluation of an on-chip ROM type of the PD7755 family.
UPD7759 Maximum Ratings
| Parameters | Symbol | Conditions | Ratings | Unit |
| Power supply voltage | VDD | 0.3 to + 7.0 | V | |
| Input voltage | VI | 0.3 to VDD + 0.3 | V | |
| Output voltage | Vo | 0.3 to VDD + 0.3 | V | |
| Storage temperature | Tstg | 40 to +125 | °C | |
| Operating temperature | Topt | 10 to +70 | °C |
UPD7759 Features
Synthesizing method : ADPCM, PCM + waveform element methods used together
Sampling frequency : 5, 6 or 8 kHz
Bit rate (speech) : 20 to 32 K bps
Number of Messages : 256 (MAX.)
External speech data ROM
Speech output : Current sink type analog output, 9-bit D/A converter
Host CPU interface : Compatible with a 4/8-bit CPU
Standby mode : Pop-noise preventive circuit incorporated
Supply voltage : 2.7 to 5.5 V
CMOS technology
Sampling frequency : 5, 6 or 8 kHz
Bit rate (speech) : 20 to 32 K bps
Number of Messages : 256 (MAX.)
External speech data ROM
Speech output : Current sink type analog output, 9-bit D/A converter
Host CPU interface : Compatible with a 4/8-bit CPU
Standby mode : Pop-noise preventive circuit incorporated
Supply voltage : 2.7 to 5.5 V
CMOS technology
UPD7759 Connection Diagram
UPD7759
PDF/DataSheet Download
- Datasheet: UPD7759
- File Size: 188119 KB
- Manufacturer: NEC [NEC]
- Click here to Download
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