Vintage Electronic Calculators:

Overview of Brands


MOS TECHNOLOGY_parts(E): MCS2521 (CalcChip)
(Page 1/1)

Product number (P/N): MCS2521,
Keywords/Tags: MCS2521
Date of intro-: ~1973, TimeKeeper IC's (sorted by Year): (Link), Case: Type = Dual In Line (DIL) 28,
Classification: / Part / Calculator-Chip,
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Used in: COMMODORE: MM3 Metric (version-2), COMMODORE_parts(E): 300148 (PCB), FABER-CASTELL: TR1, MELCOR: 380 (version-2), MELCOR: 380 (version-3), MELCOR: 500 (version-1), MELCOR_parts(E): 2262-26C (PCB), VENTRON: VT800M


IC (Member)
7344 (A002 4473)
Host: NORMAN: 600 (version-2)
S/N: 012180

IC (Member)
7413 (A006 0174)
Host: COMMODORE: MM3 Metric (version-1)
S/N: 020086

Created: 04-dec-2014, Manual-update: 02-sep-2020, Batch-update: 02-dec-2021             

# Pageloads since 2018: 52             

3 Pic(s),


If you have a (better) personal picture and/or missing info about any model not listed: Please do send a Mail