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Adaptor ESKT20QFN4A

US$ 80.53
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his adaptor is used to program Holtek 8-bit MCU with 20-pin QFN (Quad Flat No-lead) dimension 4mm x 4mm x 0.75mm package type. It must be used together with the Holtek e-WriterPro programmer. Note that 20-pin QFN package has three kinds of dimensions: 3mm x 3mm x 0.75mm, 4mm x 4mm x 0.75mm and 5mm x 5mm x 0.75mm. Please make sure the dimension before purchasing adaptor.

20-pin QFN package Adaptor
Dimension 3mm x 3mm x 0.75mm Adaptor ESKT20QFN3C
Dimension 4mm x 4mm x 0.75mm Adaptor ESKT20QFN4A
Dimension 5mm x 5mm x 0.75mm Adaptor ESKT20QFN5A

To use this adaptor, insert it into the slot on the e-WriterPro. When placing IC into this adaptor, keep the IC pin1 to align with pin1 of this adaptor (marked on the PCB).

The adapter is a consumable. The suggested programming times is 5,000 times. When the adaptor has programmed over 5,000 times, the e-WriterPro will display a warning message. It is recommended to replace a new adaptor to ensure successful programming.

The ICP pins (e-CON12A) of the adaptor are not used. The e-WriterPro is capable of performing ICP individually. Please refer to e-WriterPro user’s guide (Holtek e-Writer Series Writer User's Guide) for details.

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Product Information

  1. Dimensions: 76 x 70 x 25 (mm)
  2. Weight: 35.3g
  3. Packing List: Adaptor ESKT20QFN4A x 1


  1. Visit Holtek website e-Socket product page.
  2. Package Information (IC package diagrams and parameters)
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