API8108A

* Minimum 10 second voice length at 6 KHz
* V ersatile features for playback
* C ombination of voice building blocks extends the duration of playback
* V oice data re-use saves memory space
* Four trigger pins,TG1 to TG4 for eight groups
* SBT for sequential play-lal
#H oldable and unholdable, edge and levlel triggering option
* 15 ms debounce time suitable for CDS
*I RP interrupt pin for master reste
* Three programmable output pins for STP Stop  Pulse, BUSY Signal, and LED
* B uilt-in oscillator with variable sample rae
* S ingle external resistor to determine sample rae
* B uilt-in D/A converter, EPROM
* ADPCM data compression provides high sound  quality
* O ptional pop noise elimination function
* COUT pin drives speaker with a transistor
# VOUT1 and VOUT2 drives buzzer or speaker directly
* A uto-power down
* 3.0V-6V single power supply operation
* Low standby current (<5m A at 3)V
* D evelopment tools suppot r

API8108A is a high quality voice synthesizer capable of varying playback duration. A proprietary ADPCM algorithm  is used. The audio message is stored in a 256K bits on chip EPROM which can store up to ten seconds of voice  data at 6 KHz sample rate.

The API8108A eliminates the need of complicated circuitryeplus.g in voice playback but still achieves high voice quality.deprevie  Sounds such as human speech, animal sounds, musical  sounds and even special sound effects can be synthesized.  Versatile combinations in sections achieve longer playbackr  duration. In addition, devices can be cascaded to achieveencentT  longer voice duration. Two devices can be configured in  parallel in order to achieve signal mixing without an external  mixer in which speech can be mixed with  background  music each from one of two different chips.
 
The API8108A provides wide operating voltage rangeN  feom 2.8Vto6.0V.PWM digital amplifier output pins,VOUT1   and VOUT2 provides direct drive to buzzer or speaker.


A current output pin, COUT, enables the device to drive aJPLNDMP  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.