Hi,
try SN75176 from Texas. Very cheap, 8-pin, well behaving, etc.

Regards,
Imre


On Thu, 6 Jan 2000, John De Villiers wrote:

> I have a need for an RS-485 Network.
>
> The network will have one master , a pc with an RS-232 -> RS485 converter.
> Most of the slaves will be minor function nodes ( one or 2 I/O lines ) and a
> few will need to be a lot bigger.
>
> I've taken a look at the spec sheets for various PIC's ( those with buit-in
> USARTS and others ) and i've also gone through just about every one of
> MAXIM's RS-485 chips.
>
> I'd like to be able to use something as small as a 12c509 for the smaller
> slaves (Cost is a major factor here), im also prepared to go for the bigger
> PIC16C63/6 types for the larger nodes.
>
> Doing this im going to end up lots of different mixes of hardware and just
> about every chip is going to need special tweaking.
>
> What ideas do you have for trying to keep the network as uniform as possible
> whilst also keeping the node cost down to a minimum?
>
> Should i look at other RS-485 drivers than the maxim ones?  I know theyre
> pricey, but where i am u gotta work with what i can source locally.
>
> John
>
>