What is this IC?

[Demon]

I labelled the drawer as 4021528 OP-AMP, but apparently it's not that (it's not 402152-E either).



A search for SN0536 is empty, and google image search throws up every SMD IC known to man.



It has the same marking style as this Microchip op-amp:



A google search for SN0722 brings up MCP601.


I have no idea where I got these.

[Jerson]

Could it be this one?
https://www.microchip.com/en-us/prod...#Documentation (Low-Cost NVM Digital POT with WiperLock™)

[Demon]

I think it's the old markings for a MCP614x op-amp. I "had" labeled the drawer as an op-amp.

I know it's 8-lead, pretty sure it's msop, but it can be any of MCP6141, MCP6142 or MCP6143.




I checked my order history at Digikey, Mouser, Newark, MicrochipDirect, even eBay, Amazon and AliExpress. No clue where I got these. I'm guessing a "lot purchase" on ebay a long time ago.

[Demon]

Here's another one for you.

I have it labeled as 1680FP-3 sensor actuator; no datasheet on hand either. I think they were samples cause they're in a Dallas/Maxim plastic box (now Analog). I vaguely remember going on these sites and ordering whatever free samples I could get.




Nowhere to be seen on google, except from what appears as warehouses in Asia:

- https://cn.exshinetech.com/products/1680FP-3.html
- https://www.abc-semi.com/products/C3A/1680FP-3.html

They have it labeled as QFP by Dallas, but their datasheet links are dead.

[Jerson]

https://www.alldatasheet.com/datashe...S1680FP-3.html

DS1680FP-3 Product details
DESCRIPTION
The DS1680 incorporates many functions necessary for low-power portable products, providing an RTC, NV RAM controller, microprocessor monitor, power-fail warning, 10-bit ADC, and a touch-screen controller in one chip.

FEATURES
■ Real-time clock (RTC)
- Counts seconds, minutes, hours, date, month, day of the week, and year with leap-year compensation valid up to 2100
- Power control circuitry supports system power-on from day/time alarm
■ Microprocessor monitor
- Halts microprocessor during power-fail
- Automatically restarts microprocessor after power failure
- Monitors pushbutton for external override
- Halts and resets an out of control microprocessor
■ NV RAM control
- Automatic battery backup and write protection to external SRAM
■ 1.25V threshold detector for power-fail warning
■ 10-bit analog-to-digital converter (ADC)
- Monotonic with no missing codes
■ Four-wire analog resistive touch-screen interface

[Demon]

Woot! Thanks!

And yet I screwed up cause I never use 3.3V, I should have taken the DS1680FP-5.

[Demon]

Could it be this one?
MCP4021 (Low-Cost NVM Digital POT with WiperLock™)
- Jerson

(quote wouldn't work, I had to write it manually)


Yup, you were right. The tray had 4 plastic tracks of ICs with these 4 markings (I had assumed wrong that they were all the same, D'uh):

402122E - MCP4021 2.1K
402152E - MCP4021 5.0K
402113E - MCP4021 10.0K
402153E - MCP4021 50.0K

They matched with another tray that had 2 of those ICs along with the DigiKey labels, and they correspond with the 4 package codes for SOIC/MSOP at the bottom of page 51 of the datasheet.

[Demon]

How about this one?

Looks like a diode. Tried to take pics all around by bending lead, not sure if I got them all.









I used 3x zoom, then cropped as much as possible.

I don't see anything...

[Jerson]

Possibly older version of the 1N4148 or 1N914 signal diode. If the body is bulkier, could be ancient germanium diode

[rsocor01]

Is that glass or clear plastic? It looks like a fuse or a diode.