spec sheet for a 8308

[Dwight K. Elvey]

>From: "Pete Turnbull" <pete at dunnington.u-net.com>
>
>On Oct 1 2004, 11:06, Dwight K. Elvey wrote:
>> Hi
>>  I'm looking for a spec sheet on a 8308. I think it
>> is part of the older National Semi series DM8308.
>> It might be a 8303 ( the schematic is not to clear ).
>> I think it is an inverting 8 channel bus tranceiver.
>> I need information on which way the drivers go with
>> the direction control and is the enable true or false.
>
>I think you mean DP8303 / DP8308?  Both of these are 20-pin DIL 8-bit
>bidirectional transceivers; the DP8303 is inverting and the DP8308 is
>non-inverting.  In both cases, the A port is pins 1-8, and the
>corresponding B port pins are 19-12.
>
>On the DP8303 (and DP8304, which is the non-invering equivalent) Chip
>Disable (active high to disable) is pin 9; pin 11 is Transmit/-Receive;
>"transmit" (pin 11 high) means A is input and B is output.
>
>On the DP8308 (and DP8307, the inverting equivalent), pin 9 is
>-Transmit and 11 is -Receive (both active low).
>
>On all of them, port A can sink up to 16mA and port B can sink up to
>48mA.
>
>The DP7303/4/7/8 devices are extended-temperature range versions of
>DP8303/4/7/8.

Hi Pete
 It looks like you are correct, they should be DP8303's. Does anyone
have any of these or know where I can get any?
Thanks
Dwight