Author Topic: DigiKey MA1026 clock module  (Read 1248 times)

0 Members and 1 Guest are viewing this topic.

Offline muephonicTopic starter

  • Newbie
  • Posts: 1
  • Country: us
DigiKey MA1026 clock module
« on: March 28, 2020, 01:34:26 pm »
I am looking for schematics and instructions for a vintage 1980s DigiKey digital clock module - MA1026. Anyone out there have this one?
 

Offline rvalente

  • Frequent Contributor
  • **
  • Posts: 736
  • Country: br
Re: DigiKey MA1026 clock module
« Reply #1 on: March 28, 2020, 05:13:53 pm »
Found on google....
 
The following users thanked this post: floobydust

Offline floobydust

  • Super Contributor
  • ***
  • Posts: 7681
  • Country: ca
Re: DigiKey MA1026 clock module
« Reply #2 on: March 29, 2020, 03:38:28 am »
Did you know the early National Semiconductor COB clock modules literally made Digikey:
"Digi-Key Corporation founder and Chairman Ron Stordahl officially began purchasing components from National Semiconductor for his new distribution business in 1973. Although many of National's parts sold well, it was the sale of thousands of National Semiconductor clock modules that played the most significant role in terms of both sales and profits that fueled Digi-Key's growth during its early, critical years of business."

MA1002 4-digit, 0.5" LED (main LSI MM5385/12hr or MM5386/24hr)
MA1003 VFD automotive clock module (LSI is MM5377)
MA1010 4-digit, 0.84" LED (main LSI MM4391/12hr or MM4392/24hr)
MA1012 4-digit, 0.5" LED (main LSI MM4391/12hr or MM4392/24hr)
MA1013 4-digit, 0.7" LED (upgrade from MA1012)

I ran a MA1010 for many years, it's PMOS and sensitive to ESD and one winter it died from a zap on the buttons.
The modules need a dual winding power transformer (one for LEDS and one for IC).

I'm not sure why they were not a commercial success.
First job I used to repair clock radios in a repair shop in the 1980's, we got $5 for every unit fixed flat rate. They were all 40-pin DIP clock IC's and Taiwan builds, pretty cheap inside.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf