Re: LED Display driver (NOT seven segment)

From: Michael (NoSpam_at_att.net)
Date: 03/27/05 

Date: Sun, 27 Mar 2005 02:35:58 GMT

R Pradeep Chandran wrote:
>
> Hi All,
> I am looking for an LED driver IC that can drive a large number of
> LEDs. I am planning to make a digital clock with indiviudal LEDs for
> each minute/second mark. I searched the Net and all the drivers I could
> find are for seven segment displays. There are others for bar graphs but
> they need an analog control voltage. I just want an IC that will enable
> a set of outputs based on input commands. Input could be provided by
> memory mapping, SIO, I2C etc. I could probably do this with a set of
> buffers, latches and some high frequency multiplexing logic with the
> microcontroller that I am planning to use (AT90S8535). But, I would like
> some simpler solution so that I can use the micro's cycles for some
> thing more useful (programmable outputs, alarms etc.). Are there any ICs
> that meet my requirements?
> Have a nice day,
> Pradeep
> --
> R Pradeep Chandran pradeep DOT chandran AT sisl.co.in
> All opinions are mine and do not represent those of my employer.

MC14489. It can drive five 7-seg digits, AND it can address individual LEDs if
you use its "no decode" mode. Multiples of this chip can be wired in a string.