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'Looking for a 2003 type but with 8 drivers'
1996\10\21@135054 by David Schmidt

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Hello,
 I'm looking for a darlington driver chip like the
ULN2003 but with 8 internal driver channels instead of
7.  Anyone have a part number for such a part?  Thanks
Dave

BTW, why does SIP pullup resistor networks come with 9 or 5
resistors instead of 4 or 8?  Why is the ULN2003 7 channels
instead of 8?  With 4/8/16/32/64 bit computers you'd think
they would make parts along those numbers instead.

1996\10\21@150212 by vador Eduardo Tropea (SET)

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Hi Dave:

>BTW, why does SIP pullup resistor networks come with 9 or 5
>resistors instead of 4 or 8?  Why is the ULN2003 7 channels
>instead of 8?  With 4/8/16/32/64 bit computers you'd think
>they would make parts along those numbers instead.

The problem with ULN2003 may be a packaging problem in the original chip
(isn't a new one, in fact is very old).

SET

********************************************************************************
Salvador Eduardo Tropea (SET) - spam_OUTsalvadorTakeThisOuTspaminti.edu.ar
Work: INTI (National Institute of Industrial Technology) Sector: ICE
(Electronic Control & Instrumentation)
Post (Home): Curapaligue 2124 - Caseros (1678)- Buenos Aires - Argentina

1996\10\21@153843 by dontronics

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David Schmidt wrote:
>
> Hello,
>   I'm looking for a darlington driver chip like the
> ULN2003 but with 8 internal driver channels instead of
> 7.  Anyone have a part number for such a part?  Thanks
> Dave

Yes, ULN2803. Pinout is at:
http://www.labyrinth.net.au/~donmck/prices.html#hvdrv

Don McKenzie .....donmckKILLspamspam@spam@labyrinth.net.au
DonTronics Tullamarine, Australia
http://www.labyrinth.net.au/~donmck

EASY PIC'n Beginners Guide to using PIC 16/17 MicroChip products.
Picosaurus(tm) 40 pin FED Basic with 8 channels of A-D, and real Uart.
MEL PicBasic Compiler. Programmers from 15 USD.  Pic-Axe(tm) A New Tool.

1996\10\21@155350 by Michael Yano

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ULN2803,2804 ETC

At 10:46 10/21/96 -0700, you wrote:
>Hello,
>  I'm looking for a darlington driver chip like the
>ULN2003 but with 8 internal driver channels instead of
>7.  Anyone have a part number for such a part?  Thanks
>Dave
>
>BTW, why does SIP pullup resistor networks come with 9 or 5
>resistors instead of 4 or 8?  Why is the ULN2003 7 channels
>instead of 8?  With 4/8/16/32/64 bit computers you'd think
>they would make parts along those numbers instead.
>
>
Thanks.
    __           Micheal Yano
   ----          Internet:     miyspamKILLspamcimtek.on.ca
 -CIMTEK-        IBMMAIL:      .....i1320285KILLspamspam.....IBMMAIL.COM
------------      Voice:        (905)847-8811 x22
                   FAX:        (905)847-8822 x22

1996\10\21@162423 by rrasa

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>   I'm looking for a darlington driver chip like the
> ULN2003 but with 8 internal driver channels instead of
> 7.  Anyone have a part number for such a part?  Thanks

Allegro ULS2800 thru 2825 ...


Randy Rasa
EraseMErrasaspam_OUTspamTakeThisOuTsky.net
http://www.sky.net/~rrasa

1996\10\21@165546 by Customized Controller Solutions

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Try the ULN2803.  It has the 8 drivers.

At 10:46 AM 10/21/96 -0700, you wrote:
>Hello,
>  I'm looking for a darlington driver chip like the
>ULN2003 but with 8 internal driver channels instead of
>7.  Anyone have a part number for such a part?  Thanks
>Dave
>

1996\10\21@174555 by Bob Fehrenbach

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David Schmidt <dschmidtspamspam_OUTRAIN.ORG> wrote:

>  I'm looking for a darlington driver chip like the
>ULN2003 but with 8 internal driver channels instead of
>7.

  ULN2803


--
Bob Fehrenbach    Wauwatosa, WI     @spam@bfehrenbKILLspamspamexecpc.com

1996\10\21@192717 by Peter Grey

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At 10:46 AM 21/10/96 -0700, you wrote:

Dave,
the part you are looking for is ULN2803 which has 8 drivers.

Good luck,

{Quote hidden}

Peter Grey
Australia

1996\10\21@202604 by Steve Hardy

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> From: David Schmidt <KILLspamdschmidtKILLspamspamRAIN.ORG>
>
> BTW, why does SIP pullup resistor networks come with 9 or 5
> resistors instead of 4 or 8?  Why is the ULN2003 7 channels
> instead of 8?  With 4/8/16/32/64 bit computers you'd think
> they would make parts along those numbers instead.
>

They do.  A quick look in the RS Components catalogue shows 7, 8 and 9
resistors in a SIL.  You can also get 4 independent R's.  Having that
'extra' 9th resistor always comes in handy anyway.

Regards,
SJH
Canberra, Australia

1996\10\21@232522 by dfr

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David Schmidt wrote:

>   I'm looking for a darlington driver chip like the
> ULN2003 but with 8 internal driver channels instead of
> 7.  Anyone have a part number for such a part?

Yes, there is such a beast (8 or 9 channel peripheral driver).
Unfortunately, I'm not near my IC master right now so cannot look it up.
ULN28XX seems to ring a bell though...

> BTW, why does SIP pullup resistor networks come with 9 or 5
> resistors instead of 4 or 8?

Because almost all packages come with an even number of pins. The same
10 pin SIP can hold 5 isolated resistors, 9 single common bus (pull-up
or down) resistors, or 8 termination network (pull-up and down)
resistors.

You CAN get 9 pin pull-up or down SIP resistor packs, but they are hard
to get, and consequently expensive. I usually lay out a board with a
larger SIP size, with the end resistor(s) unused. That way the board can
take a larger SIP when a smaller one may be temporarily unavailable on
short notice.

> Why is the ULN2003 7 channels instead of 8?  With 4/8/16/32/64 bit computers
you'd think
> they would make parts along those numbers instead.

Well, the ULN200X series was never designed to drive data or address
busses, so there is no relation seen. The series are PERIPHERAL drivers
(relays, lamps, high voltage loads, etc). Thats the reason for the catch
diode connection, for inductive loads like relay or printer hammer
coils. The 18 PDIP package was introduced many years after the ULN200X
series was introduced (8, 14, 16, 24, 26, 28, & 40 PDIPs were common). A
16 PDIP can accomodate 7 drivers, a GND, and a catch diode common.

Today, we are spoiled with the selection of package styles, mounting
options, and densities available. 15 years ago it was a PDIP, CDIP, and
TO-10 type can package world!

--
Regards, Dana Frank Raymond

1996\10\22@121017 by Jimmie Curry

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Dave Wrote:
>  I'm looking for a darlington driver chip like the
>ULN2003 but with 8 internal driver channels instead of
>7.  Anyone have a part number for such a part?  Thanks
>Dave
>
Check the 2803 part, comes from many vendors.

>BTW, why does SIP pullup resistor networks come with 9 or 5
>resistors instead of 4 or 8?  Why is the ULN2003 7 channels
>instead of 8?  With 4/8/16/32/64 bit computers you'd think
>they would make parts along those numbers instead.

For some reason total pin count is always even!

Jimmie
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