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Altera_Forum
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11 years ago

Beginner needs help with ISP of MAX7000

Hi, I am trying to rescue an old Fluke DSP-4000 network tester setup. The seller said everything was operational but you can guess that was wrong. It consists of a main unit and a remote unit which...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hi,

referring to the Power Down Pin3... If this is used in the current design to minimize power consumption, the Pin is connected to GND to shut the device down. If you replace the 7032V by a 7032AE having a "normal" VCC Pin at this Location, the might end in a short circuit condition on VCC if the device has internal interconnect of all VCC Pins or at least the part of the 7032AE being powered by this pin will be unpowered, the I/O unconnected. For the 7032V the Pins would remain in the latched state, this is different behaviour.

Thus you should - IMHO - not solder the 7032AE Pin3 to the board but with a hardwire to next VCC pin to ensure the power being routed correctly. This should normally just increase the power consumption by eliminating the power down Option to save power...