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MFG:APLUS  Package Cooled:DIP20  

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Part Number: AP8842

 

MFG: APLUS

Package Cooled: DIP20

 

Description: aP8821 is a high quality voice synthesizer capable of varying playback duration. A proprietary ADPCM algorithm is used....


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AP8842 General Description


aP8821 is a high quality voice synthesizer capable of varying playback duration. A proprietary ADPCM algorithm is used. The audio message is stored in a 512K bits on-chip EPROM which can
store up to 21 seconds of voice data at 6 KHz sample rate.

The aP8821 eliminates the need of complicated circuitry in voice playback but still achieves high voice quality for different kind of sounds. Combinations in sections achieve longer playback duration.

A pair of PWM output pins, VOUT1 and VOUT2 provides direct drive to buzzer or speaker.

A current output pin, COUT, enables the device to drive a speaker through a low cost NPN transistor. No complex filtering or amplifier circuit is needed. An automatic ramp-down function eliminates undesired noise at the end of playback.

AP8842 Maximum Ratings

Symbol Rating Unit
VDD - VSS -0.5 ~ +5.0 V
VIN VSS - 0.3<VIN<VDD + 0.3 V
VOUT VSS <VOUT<VDD V
T (Operating) -10 ~ +60  
T (Storage) -55 ~ +125 􀐺�􀐺

AP8842 Features

21 Sec Voice Length at 6 KHz
Combination of voice building blocks extends the duration of playback
Voice data re-use saves memory space
Maximum 14 voice groups
4 trigger pins, S1 to S4 for the 4 voice groups ( group1 ~ 4 )
SBT for sequential playblack for the rest of voice groups & CPU mode trigger
CPU trigger mode for all 14 voice groups
Holdable, Unholdable, Edge, Level triggering option
Debounce time : 21ms ( Key mode ) / 85us (CPU mode ) - 6K sampling rate
IRP interrupt pin for master reset
3 programmable Outputs for STP stop pulse, BUSY and LED
Built-in oscillator with a single external resistor to determine the sampling rate
Built-in D/A converter, EPROM
ADPCM data compression provides high sound quality
Optional POP noise elimination function
COUT pin drives speaker with a transistor
VOUT1 and VOUT2 drives buzzer or speaker directly
Auto-power down
2.4V 4.8V single power supply operation
Low standby current (<5uA at 3V)
Development Tools Support

AP8842 datasheet

AP8842
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