We offer a series of Integrated Circuits including a monostable multivibrator, a digital replacement for the classic 555 timer, as well as programmable musical sound generators.

  image of the monostable multivibrator
picture of the digital 555 timer
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 The following data sheets and source codes are available for download:
 
HTC150 LED Flasher

This circuit controls four groups of LEDs and is useful for creating light effects.


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File size: 122 K   Download time(56K): 0 min  18 sec
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HTC550 Monostable Multivibrator

This flexible monostable multivibrator does not require external components for operation. It can generate output pulses on a rising or falling edge of a trigger signal. Has up to seven programmable output pulse durations ranging from 1uS to 10S, replacing the classic 555 timer in monostable multivibrator circuits.


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File size: 134 K   Download time(56K): 0 min  20 sec
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HTC555 Digital 555 Timer

Digital version of classic 555 timer, which replaces the 555 timer in frequency generator circuits. It provides a 1% accurate frequency output at room temperature. Includes 32 programmable output frequencies covering a range from 1Hz to 100KHz and does not require external components for operation.


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File size: 121 K   Download time(56K): 0 min  18 sec
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HTC750 Musical Sound Generator

Melody generator, useful in musical projects such as musical doorbells, melody generators for alarm clocks, musical toys or boxes. Has 4 programmable melodies. Melody samples for each device are available for download.


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File size: 123 K   Download time(56K): 0 min  18 sec
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HTC751 Programmable Musical Sound Generator

Programmable melody generator, useful in musical projects such as musical doorbells, melody generators for alarm clocks, musical toys or boxes. It uses an external serial EEPROM for melody storage and its melody compiler is available for free.


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File size: 127 K   Download time(56K): 0 min  19 sec
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HTC852 PWM Controller

General-purpose PWM controller with a fixed output frequency of 31250Hz, requires a minimum number of external components and provides a wide range of power control (32 possible settings). It's very easy to use and provides a general DC power control solution in a wide range of applications.


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File size: 126 K   Download time(56K): 0 min  19 sec
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HTC2500 Digital Clock

Simple digital clock driver, that requires very few external components for digital clock construction. Designed to work with common cathode seven segment LED displays. Uses the popular 32768Hz crystal as its time reference and is built using our micro RTOS.


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File size: 166 K   Download time(56K): 0 min  25 sec
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picture of power sequencer