Prevod 3V3 <-> 5V

[Ivo Strasil]

Mozna to je to, co potrebujete:

 www.semiconductors.philips.com/ acrobat/applicationnotes/AN97055.pdf

With a single MOS-FET a bi-directional level shifter circuit can be realised
to connect devices with different
supply voltages of e.g. 5 Volt and 3.3 Volt to one I2C-bus system. The level
shifter can also isolate a bus
section of powered-down devices from the I2C-bus, allowing the powered part
of the I2C-bus to operate in a
normal way.
The level shifter can also be used in other bus systems or point to point
connections for level shifting and/or
isolation.

Ahoj
Ivos
----- Original Message -----
From: "Michal HW" <michalgregor@centrum.cz>
To: "HW-News" <Hw-list@mailman.nethouse.cz>
Sent: Wednesday, September 08, 2004 4:48 PM
Subject: Prevod 3V3 <-> 5V


Uz to tu jednou bylo, ale zeptam se znovu:
Potrebuji prevest logicke urovne 3 linky 3V3->5V a 3 linky 5V->3V3. Neni
nejaky hotovy a bezne dostupny obvod?
Smer 3V3->5V neni nutne prevadet, ale budu tam mit jeste analogovy multiplex
a ten by mohl snizit napetove urovne.

Michal



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