In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Chris,
  Another cool LED chip is the M5451 is is a constant current sink IC that controls 35 LEDs. Shift register in parallal outputs. Limited to 15mA sink per output, but nice when you have a bunch of LEDs to control since you don't need a bunch of resistors. 
Bean.

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