The eST Series is a 3 to 340 seconds single chip high quality voice synthesizer IC which contains one 4-bit Input port (available with eST005 and above); two or three 4-bit I/O ports; and a tiny controller. eST Series provides strong features and uses improved algorithm to achieve pure speech. By programming through the tiny controller, user's applications, such as section combination, trigger mode, control outputs, keyboard matrix, and other logic functions, can be easily implemented.

Features

• Single Power Supply
• Crystal/Ring oscillator option
• 3 ~ 340 seconds voice capacity
• Power down mode for power saving
• Reset pin available
• Single ROM for voice program. 32K maximum program address size
• Readable ROM data
• One 6 bit timer overflow control is provided
• Two stacks for subroutine call
• 5 bits ASPCM + synthesis
• 38KHz modulation for IR transmission
• 15 steps volume control
• Direct Drive/traditional DAC
• 8 bits resolution D/A
• GREEN Voice™