How to drive 5V IC through Cyclone

Status
Not open for further replies.
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
    Helpful Answer Positive Rating
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
    Helpful Answer Positive Rating
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
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…