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[[Category:83Plus:General_Hardware_Information|TI-83 Plus Hardware Revisions]]

Latest revision as of 02:53, 12 December 2021

The TI-83 Plus has gone through about 50 different hardware revisions, and has evolved significantly from the 5-chip original 1999 design to the 3-chip design used presently. Careful analysis of hundreds of TI-83 Pluses has led to the following conclusions.

Produced by Inventec

Inventec produced the prototypes of the TI-83 Plus and the earliest production models; serial numbers indicate production began in March 1999, which is nearly a year later than the TI-73. Hardware revisions are not comparable between factory codes I and S, but they are comparable between factory codes S and P.

Interestingly, after having switched to the 3.3-volt Inventec 6SI837 for quite some time, Inventec produced a short run of 5-chip TI REF 9815455GAII-based TI-83 Pluses as factory code I, hardware revision D.

Production expanded to Shanghai, as factory code S, in 2000. By 2002, Shanghai was Inventec's sole production of the TI-83 Plus. Only hardware revision A used the 5-chip architecture, while all later models use a 3-chip architecture around either the Inventec 6SI837 or the TI REF TI-738X ASIC. Hardware revision E changed to a LCD with poor contrast, and use of this poor-quality LCD continued at least through F. Hardware revision J synchronized hardware revision lettering with Nam Tai, as both manufacturers switched to 3.3-volt LCD drivers and eliminated the LCD daughterboard entirely. During revision K, and without bumping the hardware revision, the LCD driver was switched from the T6K04 to the NT7564H; this happened sometime during 2007.

Late in 2007, production moved from Shanghai to Pudong. The Pudong LCDs have the poorest contrast ratio of any TI-83 Plus hardware, but the hardware is otherwise identical to Shanghai-produced calculators of the same revision.

Inventec (I)

Inventec (factory code I)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
XX-X Proto Z84C00 9815455 SRM2B256SLMX Am29F400BT T6A04
A Jan 1999 May 2001 Z84C00 9815455GAII SRM2B256SLMX Am29F400BT T6A04A
B Mar 2001 Apr 2001 6SI837 MBM29LV400TC T6A04A
D May 2001 Z84C00 9815455GAII A62W5308M MBM29F400TC T6A04A

Inventec Shanghai (S)

Inventec Shanghai (factory code S)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
A May 2000 July 2001 Z84C00 9815455GAII GM76C256 HY29F400TT T6A04A
B Aug 2001 May 2002 6SI837
C Jan 2002 May 2003 6SI837 MX29LV400TTC T6A04A
D May 2002 Apr 2004 6SI837 MBM29LV400TC T6A04A
E Apr 2004 Apr 2005 6SI837 MBM29LV400TC T6K04
F Feb 2005 Jun 2005 6SI837 MBM29LV400TC T6K04
J Feb 2006
K (early) Mar 2006 TI-738X T6K04
K (late) Aug 2007 TI-738X S29AL004 NT7564H
Inventec Pudong (factory code P)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
L Dec 2007 Apr 2013 TI-738X S29AL004 NT7564H
M Jul 2013 Dec 2013 TI-738X MX29LV400CTTC NT7564H

Produced by Nam Tai

Nam Tai produced the TI-83 Plus alongside Inventec from the first year of production all the way until the end of 2010, if not later. The baby blue Target cosmetic variant was only produced by Nam Tai. Earlier Nam Tai calculators were plagued with the LCDs missing rows/columns, but the contrast of the LCD is superior to Inventec's. Hardware variants are scattered throughout date periods and are not exactly chronological.

Nam Tai (N)

Nam Tai (factory code N)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
A Oct 1999 Aug 2000 Z84C00 9815455GAII SRM2B256SLMX MX29F400TTC T6A04A
C Aug 2001
D Dec 2001
E Feb 2002 Feb 2003 Z84C00 9815455GAII W24258S MX29F400TTC T6A04A
F Feb 2003 Apr 2003
G May 2003 Dec 2005 Z84C00 9815455GAII HY62WT08081E MX29F400TTC T6A04A
H Mar 2005 Dec 2005
I Mar 2006
J May 2006 Sep 2006 TI-738X S29AL004
L Mar 2007
Q Apr 2007
S Apr 2007 May 2007
T May 2007 Jun 2007 TI-738X COB NT7564H
U May 2007 Jul 2007 TI-738X COB MX29LV400CTTC NT7564H
V Jan 2008 Jan 2009 TI-738X COB NT7564H
X May 2009 Sep 2010 TI-738X COB MX29LV400CTTC NT7564H

Produced by Kinpo

Kinpo co-produced the TI-83 Plus with Inventec Pudong for a brief period of time, but was soon the sole TI-83 Plus manufacturer. Kinpo's calculators can be quickly identified by an angled plastic bezel immediately below the LCD. While LCD contrast and durability is excellent on these calculators, the new Kinpo LCD driver used on later-production calculators (perhaps isolated solely to the Philippines factory) can cause issues with community assembly programs; earlier hardware uses the NT7564H LCD driver. Hardware revisions are comparable between Kinpo China and Kinpo Philippines.

Certain calculators produced by Kinpo Philippines, especially those sold at Walmart, began using a new serial number format, with the first letter indicating year of production (A=2019, B=2020, ...) and the next two digits indicating the week of production. Since hardware revisions do not appear to be encoded in this format, direct comparison of PCBs is necessary to determine a calculator's hardware revision.

Kinpo (K)

Kinpo China (factory code K)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
pre-A May 2011 Jul 2011
A Apr 2012 Jul 2012
B Jun 2012 Apr 2014
C Apr 2014 Aug 2014

Kinpo Philippines (L)

Kinpo Philippines (factory code L)
Revision First Seen Last Seen CPU ASIC RAM FlashROM LCD Driver
C Jan 2015 Nov 2016
D Dec 2017 Jun 2018 TI-738X COB New Kinpo
E Jul 2018 Jan 2021 TI-738X COB MX29LV400CTTC New Kinpo
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