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HT1635B - 44 x 8 LED Driver

Download the HT1635B datasheet PDF. This datasheet also covers the HT1635A variant, as both devices belong to the same 44 x 8 led driver family and are provided as variant models within a single manufacturer datasheet.

General Description

The HT1635A/HT1635B is a memory mapping LED display controller/driver.

The maximum display capacity of the device is 352 patterns composed of 44 rows and 8 commons.

The device can generate 16 LED illumination levels using software controlled PWM circuitry.

Key Features

  • Operating voltage: 2.4V~5.5V.
  • LED display -- 44 row and 8 Columns.
  • 88×4 bit RAM display data storage.
  • 16-level PWM brightness control.
  • Integrated 256kHz RC oscillator.
  • I2C-bus or 4-wire serial interface.
  • Data mode & command mode instructions.
  • Cascade function for extend.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (HT1635A-Holtek.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Holtek Semiconductor

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HT1635 44 x 8 LED Driver
HT1635A 44 x 8 LED Driver
HT1632C 32 x 8 & 24 x 16 LED Driver
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HT12C Encoder

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
HT1635A/HT1635B 44×8 LED Driver Features • Operating voltage: 2.4V~5.5V • LED display -- 44 row and 8 Columns • 88×4 bit RAM display data storage • 16-level PWM brightness control • Integrated 256kHz RC oscillator • I2C-bus or 4-wire serial interface • Data mode & command mode instructions • Cascade function for extend applications • Selectable NMOS open drain output driver and PMOS open drain output driver for COM lines • 64-pin LQFP package Applications • Industrial control displays • Digital clocks, thermometers, counters, electronic meters • Instrumentation readouts • Other consumer applications • LED displays General Description The HT1635A/HT1635B is a memory mapping LED display controller/driver.