Vintage Electronic Calculators:
CALCUSEUM Home page

Overview of Brands

Colleagues

NATIONAL SEMICONDUCTOR: 4640 (version-1)
(Page 1/1)


Product number (P/N): 4640,
Keywords/Tags: 4640
Date of intro: 1976, Origin: Malaysia (List), USA (List), Dimensions: 160x82x36mm,
Power: Rechargeable,
Display: Type = Display (LED) (List), Digits = 10+1+(2+1),
Number of keys: 36, #Key-Black: 4, #Key-Grey: 1, #Key-White: 13, #Key-Yellow: 18,
Classification: / Pocket / RPN (Reverse Polish Notation),
Featuring: Scientific functions, Procent, Square root, Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Related with: NATIONAL SEMICONDUCTOR_docu: 102035A (Instr.) 4640,
Main Components: NATIONAL SEMICONDUCTOR: DS8664N; NATIONAL SEMICONDUCTOR: MM5781DP?; NATIONAL SEMICONDUCTOR: MM5782N,
Other components: NATIONAL SEMICONDUCTOR: DS8867N,
Original Equipment Manufacturer : NATIONAL SEMICONDUCTOR: 4640 (version-1) (List of all Export-OEM-models from NATIONAL SEMICONDUCTOR), Resemblance with: HIRADASTECHNIKA SZOVETKEZET: TK1024 (version-1),
Serie-members: NATIONAL SEMICONDUCTOR: 4640 (version-1) (No Red Key); NATIONAL SEMICONDUCTOR: 4640 (version-2) (One Red Key),
Known Serial-numbers: 073757 | 122087 (List of all S/Ns from NATIONAL SEMICONDUCTOR)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Info: Version with no red keys
Internet: Link-1: LE RAYON DES CALCULATRICES

Item

Accessories

Advertisement
Calculators op weg naar de top!
ELEKTUUR / AVEN
Pag.11-16
(nov-1977)

Advertisement
Geroemd door Amerikaanse wetenschappers
ELEKTUUR / AVEN
Pag.12-81
(dec-1977)

Magazine (fragment)
Calculators, scientific and financial
WHICH?
Pag.520+521
(sep-1977)

Created: 01-jan-2014, Manual-update: 24-sep-2020, Batch-update: 24-jun-2022             

# Pageloads since 2018: 189             

5 Pic(s),

                     

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