|
Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
|
Thread Tools |
18th Apr 2021, 4:30 pm | #1 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
|
Resistor array markings
I am currently working on a modern-ish PCB, I guess about 30 years old. It contains several of those single-in-line resistor arrays.
Now I am, of course, familiar with the value being given as 3 digits in the part number, which you read like a resistor colour code. So that 472 would be 4k7, 105 would be 1M, etc One of the devices on this board uses a 4 digit code -- 1002. And yes it is 10k (100*10^2). I checked it with my meter. Not seen that one before. |
18th Apr 2021, 5:53 pm | #2 |
Guest
Posts: n/a
|
Re: Resistor array markings
Used a lot for more precise indication, xxy will only get to 10% xxxy to 1%.
|
18th Apr 2021, 10:26 pm | #3 |
Nonode
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 2,085
|
Re: Resistor array markings
8 resistors with a common connection makes good sense for BCD lines, but the odd one out here is marked 8X-1-104. Unless I've missed something it is 7 × 100k with a common connection (that's what it measures)
__________________
- Julian It's good here |
18th Apr 2021, 10:31 pm | #4 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,483
|
Re: Resistor array markings
They were available in various resistor counts although as you say the most obviously useful would be 8-resistor. I have seen them in everything from 4 through to 8 in a package.
|
19th Apr 2021, 12:27 am | #5 |
Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,324
|
Re: Resistor array markings
Just checked my regular supplier - available in every number of pins from 4 - 10.
I have seen bigger ones, but they weren't a resistor to one common pin, rather one resistor between two adjacent pins. |
19th Apr 2021, 2:16 am | #6 |
Heptode
Join Date: Oct 2009
Location: Melbourne Australia
Posts: 898
|
Re: Resistor array markings
Sometimes required the last pin to be cut off when the parts bin was empty for a particular package.
|
19th Apr 2021, 2:35 am | #7 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,549
|
Re: Resistor array markings
They also appear in DIL packages too.
|