PLAnkton EV - PLA Replacement (Exact Voltage)

SKU: HW0807
Category: Commodore 64/128
Manufacturers: pxlmod

PLAnkton EV is the well known and popular substitute for the C64 PLA U17 part no. 906114-01 or 251064-01 - but with an exact voltage of 4.3 volts.

Compatible with C64 mainboards:

Assy. 326298
Assy. 250407
Assy. 250425
Assy. 250466
KU-14194
C64 Reloaded MK1
SX-64

NOT compatible with C64 mainboard:

Assy. 250469

25,00 €

incl. 19% VAT , plus

Low stock level
Delivery time: 3 - 10 Workdays (DE - int. shipments may differ)

A genuine Commodore PLA signals at a voltage between 3.7 and 4.5 volts. Usually hovering around 4.3 volts. PLAnkton feeds the XC9536XL core CPLD at 3.7-3.8 volts and while this is within the requirements to be representative of a good PLA, it is beyond the recommended operating voltage defined by the manufacturer. At the same time, it is somewhat too low when compared to a genuine Commodore PLA.
Also, even when using the low power mode of the XC9536XL and slew rate limiters built into this type of IC, PLAnkton's slew rate signaling remains much higher than a genuine old PLA.
PLAnkton EV resolves these issues by adding a CMOS buffer which will be powered at 4.3V while the CPLD is now powered at 3.3V. The buffer uses legacy CMOS technology which has a low slew rate nearly identical to that of vintage technology PLAs and is powered at a voltage which also allows it to signal a higher voltage, now also nearly identical to that of vintage technology PLAs.

Full compatibility with all versions of the C64s carrying a 28 pin PLA and ALL C64 motherboards using this type of PLA as well as all C64 cartridges and peripherals including PLA sensitive carts such as: FastLoad, Super Zaxxon, 1541 Ultimate I/II/II+ and consumes only 20 mA - one fifth the power of an original Commodore PLA which means it will run very cool. It's equipped with slim gold plated pins that doesn't damage your original socket to ensure the highest reliability and longevity.

Features and characteristics:

Draws only 20 mA - 1/5 the power of an original Commodore PLA, the same as a small green LED
Produces no discernable heat
Designed by qualified professionals using actual electrical engineering practices to produce electrical signals of EXACTLY the same voltages as a genuine Commodore PLA and speed within +/-2 ns of accuracy
Made using industry standard circuit boards, new parts and professional soldering and assembly methods - no basement tinkering techniques, prototype grade boards or surplus parts
100 % compatible (actually tested) with ALL PAL & NTSC C64 mainboards 326298, KU-14194, 250407, 250425, SX-64, 250466 (NOT compatible with board 250469 - this board doesn't use a 28 pin PLA)
100 % compatible with ALL C64 cartridges including Epyx FastLoad, 1541 Ultimate I, II & II+, Super Zaxxon, Easy Flash 1 and 3 (tested with these cartridges and many others)
Made only using new, currently available, genuine Xilinx circuits purchased from an authorized distributor - no 'fast' counterfeit ICs or surplus parts that were storaged for years
Gold plated pins for best reliability and longevity
Each individual units fully tested