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RAM Mapping 28×8 Constant Current LED Driver
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HT16D35A/HT16D35B
RAM Mapping 28×8 Constant Current LED Driver
Features Applications • Operating voltage: 2.7V~5.5V • Industrial control displays • LED display: 28 rows and 8 commons • Mobile phones • LED data RAM1: 28×8×6 bits=1344 bits for Gray
mode • Traffic signboards and information displays
• Digital clocks, thermometers, counters, electronic
meters • LED data RAM2: 28×8×6 bits=1344 bits for FADE
mode • Instrumentation readouts • LED data RAM3: 28×8 bits=224 bits for Binary
mode or Matrix masking • Other consumer applications
• LED displays • LED data RAM4: 28×8 bits=224 bits for Universal
Segment function General Description • LED data RAM5: 8×8 bits=64 bits for Universal
COM function The HT16D35A/HT16D35B are high accuracy
constant current and memory mapping LED display
controller/drivers. The maximum display capacity
of the devices is 224 patterns composed of 28 rows
and 8 commons. The devices can generate a 64 step
Gray Scale (PWM data) using software controlled
PWM circuitry and 64 LED illumination levels using
software controlled PWM circuitry. The devices
provide constant current outputs control using external
resistors for each row output terminal. A serial
interface is provided to allow the devices to receive
instructions for its command mode and data mode.
Only three lines are required for device interfacing to
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