Anyone recognise this device or Manufacturer Symbol? - Page 1
Forum section: electronics / projects

author: martinator
author_rank: Contributor
timestamp: May 14, 2017, 05:01:49 pm
content: Anyone recognise this device or Manufacturer Symbol?Thanks.

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 14, 2017, 05:17:17 pm
content: That's very likely an ODC

author: BrianHG
author_rank: Super Contributor
timestamp: May 14, 2017, 05:27:31 pm
content: What on earth?Now I need to know too...

author: coromonadalix
author_rank: Super Contributor
timestamp: May 15, 2017, 10:36:21 pm
content: would be nice to know what equipment it is ? model ?

author: martinator
author_rank: Contributor
timestamp: May 16, 2017, 06:50:44 am
content: It's in a programming adapter for a universal programmer.

author: bsudbrink
author_rank: Frequent Contributor
timestamp: May 16, 2017, 11:59:38 am
content: I hate to suggest this, but it's an 8 pin ic wired to a resistor and a cap... could it just be a 555?

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 12:12:22 pm
content: A chinesium IC, and very likely an ODC.

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 12:15:59 pm
content: Can't be a 555, it has pin 4 (RESET) grounded.

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 12:18:21 pm
content: Martinator, show us the other side of the pcb please.

author: bsudbrink
author_rank: Frequent Contributor
timestamp: May 16, 2017, 12:45:01 pm
content: Quote from: GeorgeOfTheJungle on May 16, 2017, 12:15:59 pmYes, you're right. Sorry, the coffee hasn't sufficiently enlivened my brain yet this morning.

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 01:06:36 pm
content: LOL, thanks!

author: bsudbrink
author_rank: Frequent Contributor
timestamp: May 16, 2017, 01:16:25 pm
content: By "ODC" do you mean on-die capacitor? I'm not familiar with their usage.

author: ElektroQuark
author_rank: Unknown
timestamp: May 16, 2017, 01:26:48 pm
content: Maybe an EEPROM for the manufacturer to test the "authenticity" of the adapter?

author: bktemp
author_rank: Super Contributor
timestamp: May 16, 2017, 01:41:46 pm
content: My guess would also be EEPROM.I see 3 wires going from the to the connector (+ 2 supply traces). SDA+SCL + ? (maybe WP for programming)Can you measure where the traces are connected to the ic? If the traces are going to pins 5-7 and pins 2+3 are connected to either pin 4 or pin 8 it is most likely an EEPROM.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: May 16, 2017, 02:40:58 pm
content: +1National Semi? SPI EEPROM. Pin 4 is GND which is connected to Pin 1 which is /CS. Pin 8 is VDD. Bypass Cap is then between VDD/VSS Pin 8 and 4.

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 02:41:09 pm
content: QuoteVCC, /CS and GND are alright

author: bktemp
author_rank: Super Contributor
timestamp: May 16, 2017, 03:21:05 pm
content: Do SPI EEPROMs work correctly with CS\ permanently connected to GND? I don't think so, because a new command gets only recognized after CS falling edge.I recently had a problem with an SPI flash not working correctly (it did not respond to the first command). After initialization of the IO pins, I forgot to set CS to high, so it was still low when sending the first command. Maybe during power up there were some glitches on SCK line. Therefore I would never design a circuit this way.

author: ElektroQuark
author_rank: Unknown
timestamp: May 16, 2017, 03:32:36 pm
content: They only have to read it once. No more communication required.

author: macboy
author_rank: Super Contributor
timestamp: May 16, 2017, 03:40:45 pm
content: More likely I2C EEPROM than SPI

author: MagicSmoker
author_rank: Super Contributor
timestamp: May 16, 2017, 03:58:27 pm
content: That logo looks really familiar but it isn't National Semiconductor. I also have no idea what ODC stands for...

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: May 16, 2017, 04:17:32 pm
content: ODC is a chinese brand: "One Day Corporation" (I know, I know...)

author: martinator
author_rank: Contributor
timestamp: May 16, 2017, 06:31:14 pm
content: That's super work guys. I can have a poke around now. It probably is an eprom to help the programmer identify which adapter it's using. Thanks everyone.