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How to drive 5V IC through Cyclone

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Re: Cyclone doubt

as per cyclone handbook

"A Cyclone device may not correctly interoperate with a 5.0-V device if the
output of the Cyclone device is connected directly to the input of the 5.0-V
device. If VOUT of the Cyclone device is greater than VCCIO, the PMOS
pull-up transistor still conducts if the pin is driving high, preventing an
external pull-up resistor from pulling the signal to 5.0-V.

Cyclone device can drive a 5.0-V LVTTL device by connecting the
VCCIO pins of the Cyclone device to 3.3 V. This is because the output high
voltage (VOH) of a 3.3-V interface meets the minimum high-level voltage
of 2.4-V of a 5.0-V LVTTL device. (A Cyclone device cannot drive a 5.0-V
LVCMOS device.)"
 

    Y

    yamaha

    Points: 2
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Re: Cyclone doubt

that means i can interface 5V i\Ps without any problem
 

Re: Cyclone doubt

U can also go through the document
 

    Y

    yamaha

    Points: 2
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Re: Cyclone doubt

thanks for the info, what shud i do when i have to drive a 5V IC with cyclone
 

Re: Cyclone doubt

use level translator 3.3 to 5
 

    Y

    yamaha

    Points: 2
    Helpful Answer Positive Rating
Re: Cyclone doubt

SN74LVC4245A FROM TI
IDT74FCT164245 FROM IDT

U CAN LOOK FOR 164245 SEIES IN PERICON TOO
 

    Y

    yamaha

    Points: 2
    Helpful Answer Positive Rating
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