Nyquest Technology Corporation Limited

LED Control & Drive IC  
Speech IC 
Multi-Channel Speech/Melody IC 
Home Appliances 
8-bit MCU with LCD Driver 
Accessory ASIC 
32-bit MCU 
Development Tool 

Nyquest provide good quality and efficiency OTP ICs that have complete and total solutions for all series of Nyquest products.


NY7 Series

The NY7 series IC is a powerful 4-bit micro-controller based sound processor. There are 8 channels that are configured as speech or MIDI, and all of these 8 channels or part of them can be played with speech or MIDI simultaneously.NY7 can precisely synthesize any tone frequency of MIDI with +/- 0.5% accurate internal oscillation and automatic Tone-Calibration. Besites, NY7 provides two kinds of audio outputs with fine resolution, one is 13-bit current-type D/A converter (DAC) and the other is 13-bit Push-Pull amplifier (PP). Therefore NY7 speech/melody quality is the best choice among all solutions.


  • Wide operating voltage range: 2.0V to 5.5V.
  • 4-bit RISC type micro-controller with 74 instructions.
  • NY7CxxxA have 19 bodies. The maximum ROM size is 1536K x 12-bit. Program and voice data share the same ROM space.
  • 448x4-bit RAM, divided into 2 pages.
  • Up to 4MHz system clock for instruction execution.
  • Slow mode to operate at low power consumption. (+/-3% accuracy)
  • Halt mode to save power, less than [email protected] standby current.
  • Built-in internal Ring oscillation is accurate with +/- 0.5% frequency deviation.
  • Low voltage reset (LVR=1.9V) and watch-dog reset (WDT) are supported to protect the system.
  • One interrupt entrance for multiple interrupt sources with an independent stack.
  • Up to 24 flexible Bi-direction I/Os. Direction of each I/O is independently controlled by individual register bit.
  • Each Bi-direction I/O pin can be optioned as different input and output function. For the input option, users can select one of three kinds of option: input with pull-high resistor, input without pull-high resistor, or input with register-controlled pull-high resistor (high-to-low wakeup only). For the output option, users can select one of three kinds of option: output with normal drive current and normal sink current, large sink current or constant sink current. (Mask option)
  • Shared pins to provide IR carrier and external reset feature: PF2/IR & PF3/Reset. (Mask option)
  • Selection of IR carrier frequency and data high/low IR output is supported.
  • Maximum of 8 channels can be played simultaneously, each channel can be arbitrarily assigned as speech or MIDI channel.
  • New high fidelity 6-bit ADPCM speech/ MIDI timbre synthesis algorithm and ADSR with 256-step envelope for MIDI synthesis.
  • Patented noise filtering algorithm with 128KHz over sampling to enhance signal-to-noise ratio and provide excellent sound quality without ROM size increase.
  • 16-step digital volume control for synthetic speech/melody.
  • Built-in hardware automatic Tone-Calibration of near-zero frequency deviation for precise tone frequency.
  • High quality 13-bit D/A converter or 13-bit push-pull amplifier audio output. (Push-Pull output power Pout=1.3W @ VDD=5V, THD+N=10%, F=1kHz, RL=4Ω.)
Nyquest Technology Co., Ltd. Address: 7F-1, No.81, Shuili Road, Hsinchu City 30059, Taiwan, R.O.C. Tel: +886-3-516 9077 Fax: +886-3-516 9076
?2010 Copyright   Nyquest Technology Co., Ltd., All Rights Reserved. Best Viewed at 1280 x 1024 Microsoft Internet Explorer 8 Last updated: 2020/03/20
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