Date of introduction:  1985 Display technology:  LCD
New price:  CAD 19.99 (SRP Oct. 1985) Display size:  8
Size:  4.3" x 2.4" x 0.30"
 110 x 60 x 8 mm3
Weight:  1.6 ounces, 45 grams Serial No:  
Batteries:  2*LR54 Date of manufacture:  mth 08 year 1986
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8  Integrated circuits:  NEC uPD1834G
Memories:  1 + 1    
Program steps:   Courtesy of:  Joerg Woerner

Aurora entered the market of Checkbook Calculators with the CB-900 in 1983 and introduced in 1985 with the AC-22 PASSPORT a compact and unique combination of:

Account Balancing Memory with dedicated [CHK] [DEP] [BAL] keys
30 built-in conversion constants between US/UK Imperial and Metric Units
Free programmable rate conversion between US$ and foreign currency
Percentage and square root function

Dismantling the featured AC-22 PASSPORT manufactured in August 19861983 in Taiwan reveals a clean design centered around a NEC uPD1834G single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by two small LR54 (LR1130) batteries.

Inspecting the PCB of this Autora AC-22 PASSPORT calculator brought our attention to a small mark reading 0151 1834G  01322, most likely a reference to Model 0151 and the NEC uPDNS1834G calculator chip used with the PCB. We compiled a list of the PCB-Marks we discovered on similar Account Manager calculators.

Learn more about single-chip calculator circuits used in Account Manager Calculators.

Don't miss the Corvus CheckMaster introduced by Mostek already in 1975. This rare product retains the balance of your memory even when shut off but uses power-hungry electronics.

If you have additions to the above article please email:

Joerg Woerner, March 17, 2020. No reprints without written permission.