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Home > White LED Driver
UL319B Datasheet
  

 

SERIAL-INTERFACED 14-DIGIT LED CONTROLLER IC WITH KEYSCAN

 

 

DESCRIPTION

 

The UL319B is a compact LED controller and driver that

interface microprocessors to LED displays through a serial

3-wire interface. It drives LED connected in common anode

configuration. The UL319B drives up to 112 discrete LEDs

in 14 segment/8 digit configuration while functioning from a

supply voltage of 5.0V.

 

FEATURES

 

* LED driver with 22 outputs (14 segments/8 digits)

* Output pins connected directly to the LEDs

* Key-scanning (8 x 2 matrix)

* 3-wire serial bus interface (CLK, STB, DI/O)

* 8-step dimming circuit to control the overall display brightness

* Inputs with Schmitt trigger give superior noise immunity

* 5.0 V (± 10%) for VDD

* Drives common-anode LED digits

* Built-in power on reset circuits

* Built-in pull-up resistor (CLK,STB,DI/O)

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