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DESCRIPTION

The M66503A is a constant current LED driver IC, whose output current is variable. The IC’s functions include 16-bit serial input/parallel output shift register with output latch. The product uses Bi-CMOS process for highly accurate constant current driving, permitting high-efficiency LED driving without using a resistor that limits LED current. Settings for the LED drive current are made by an external resister, thereby ensuring a maximum output current of 30 mA, enough for anode-common LED driving. Furthermore, the pin configuration of the IC permits easier wiring on a printed board.

FEATURES

? Anode-common LED driving

? Constant current output: Set to a value within a range between 0 and 30mA with an external resistor only. Simultaneous lighting available.

? Pins (OEA, OEB) provided for forced ON/OFF of LED drive current.

? Greater noise margin: Total-input Schmitt circuit is employed to deal with longer wire lengths.

? Input/output CMOS compatible

? Serial data output provided (SQ15)

? 5V single power supply

? Pin configuration for easier wiring on printed board

APPLICATION

LED array drivers for display panel and printer. Other various

LED modules.