SERIAL-INTERFACED 10-DIGIT LED CONTROLLER IC WITH KEYSCAN

DESCRIPTION

The UL318B 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 UL318B drives up to LEDs in 8 segment/6

digit~10 segment/4 digit configuration while functioning from a

supply voltage of 5.0V.

FEATURES

* LED driver (10 segments/6 digits~10 segments/4 digits)

* Output pins connected directly to the LEDs

* 3-wire serial bus interface (CLK, STB, DIO)

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

* Inputs with Schmitt trigger give superior noise immunity

* 5.0 V (± 10%) for V DD

* Drives common-anode LED digits

* Built-in power on reset circuits

* Built-in pull-up resistor (CLK,STB,DIO)