HT1635A

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. 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. A serial interface is provided to allow the device to receive instructions for its command mode and data mode. Only two or four lines are required to interface the device to a host controller. The display capacity can be easily extended by cascading the devices thus expanding its application possibilities. The device is compatible with most microcontrollers offering easy interfacing via its two serial interfaces, an I2C bus or a 4-wire serial bus. Selection Table Part Number HT1635A HT1635B Interface 4-wire serial bus I2C serial bus Block Diagram CSB/A0 RDB/A1 WRB/SCL DATA...