MM5451 35 output LED driver IC

These MM5451YN ICs are brand new old stock (made in 2007) from Micrel (Microchip). They have 35 current limited outputs and a brightness adjustment that changes LED current for all outputs together. Simple serial data input lets you drive them from any microcontroller - we used these in our "80 LED, two colour backlight panel and driver kit", controlling them from a Picaxe micro.

The cheapest we've seen these for recently is around $12 in one-off quantities, but we have them at half that, but have limited stock.

Datasheet is here.