Logic level conv.

Guest
Hi i'm working on a project that requires me to interface 2 ICs FT2322C
& TMC428. the prob is that their logic levels are different
For FT2322C (1st IC, its o/p fed to TMC428)
Vol 0.3-0.5
Voh 3.2-4.9
For TMC 428
Vil 0.9-1.2
Vih 1.5-1.9
There aren't ne std chips available for this conv. Can ne1 suggest a
method for the conv.
Will simple vltg dividers work here?
Thnx for the repliens in advance
 
On 16 Dec 2004 20:39:44 -0800, gauravvr@yahoo.co.in wrote:

Hi i'm working on a project that requires me to interface 2 ICs FT2322C
& TMC428. the prob is that their logic levels are different
For FT2322C (1st IC, its o/p fed to TMC428)
Vol 0.3-0.5
Voh 3.2-4.9
For TMC 428
Vil 0.9-1.2
Vih 1.5-1.9

There aren't ne std chips available for this conv.
Respectfully disagree. TI has a plethora of parts here:
http://www.ti.com/trans
such as this one
http://focus.ti.com/docs/prod/folders/print/sn74lvc1t45.html
which will convert a logic signals between (1.65V to 5.5V) and (1.65V
to 5.5V).

Can ne1 suggest a
method for the conv.
Will simple vltg dividers work here?
Yes, depending on speed requirements.

A single series resistor may also work; this depends on the protection
diode inside the input of the 1.8V powered device to limit the
voltage.

Regards,
Allan
 
On 16 Dec 2004 20:39:44 -0800, in sci.electronics.design
gauravvr@yahoo.co.in wrote:

Hi i'm working on a project that requires me to interface 2 ICs FT2322C
& TMC428. the prob is that their logic levels are different
For FT2322C (1st IC, its o/p fed to TMC428)
Vol 0.3-0.5
Voh 3.2-4.9
For TMC 428
Vil 0.9-1.2
Vih 1.5-1.9
There aren't ne std chips available for this conv. Can ne1 suggest a
method for the conv.
Will simple vltg dividers work here?
Thnx for the repliens in advance
I think you need a new keyboard, a lot of letters are mssng in yr pst


martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.
 
Hi
Seems like the TMC is using LVDS levels where the FT is regular LVTTL.
LVDS to LVTTL convertors are quite common, try OnSemi/ MICREL/ TI and such
on
Amnon

"martin griffith" <martingriffith@yahoo.co.uk> ???
??????:tvb5s0ts4uhfit8uotnt05k0t0pi2ofafo@4ax.com...
On 16 Dec 2004 20:39:44 -0800, in sci.electronics.design
gauravvr@yahoo.co.in wrote:

Hi i'm working on a project that requires me to interface 2 ICs FT2322C
& TMC428. the prob is that their logic levels are different
For FT2322C (1st IC, its o/p fed to TMC428)
Vol 0.3-0.5
Voh 3.2-4.9
For TMC 428
Vil 0.9-1.2
Vih 1.5-1.9
There aren't ne std chips available for this conv. Can ne1 suggest a
method for the conv.
Will simple vltg dividers work here?
Thnx for the repliens in advance
I think you need a new keyboard, a lot of letters are mssng in yr pst


martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.
 

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