Article ID: 000085542 Content Type: Troubleshooting Last Reviewed: 07/09/2014

What is the rise and fall time requirement for the JTAG data (TDO) going to the USB Blaster?

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BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description The rise and fall times for the input of the 74LVC244APW driver that is used in the USB Blaster™ are min 0 ns/V to a max of 10 ns/V with a voltage range of 2.7V to 3.6V on the VCC pin. If you are using lower voltage on the VCC pin in the range of 1.2V to 2.7V then the spec will be a min of 0 ns/V to a max of 20 ns/V. For more information please refer to the Philips buffer/driver (74LVC244APW) devices datasheet.

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