need a 3.3V <-> 5V signal level translator in DIP package

Sep 21, 2007 2 Replies
S

I'm looking for a data level translator chip to connect a 5V mcu to a



3.3V radio modem. The ideal chip should provide full 4 way level translation for rxd,txd,rts and cts signals with no external parts (sort of a 4x MAX3370). A double 2 way arrangement using two chips would be still ok though. Speed and price are not a problem: the data rate will never exceed 38.4 kbps and I'll need only a dozen of these beasts for now; my only requirement is the DIP package: being still not skilled/equipped for SMD soldering I'm forced to go for a stone age old DIP part, which makes it harder to find. Could anyone suggest some chips with these features? Thanks!
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H

5V to 3.3V is easy. It just takes 2 resistors. Sometimes you can get away with only one if the 3.3V input has good protection diodes. 3.3V to 5V may just work. Read the fine print on the data sheets. The typical 3.3V outputs are CMOS driving very close to 3.3V. The typical old TTL input (still emulated by a lot of 5V logic) was 2.8V min to guarantee a high.
These are my opinions, not necessarily my employer's. I hate spam.
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E

Hand soldering SOIC surface mount parts is really quite easy, using normal solder and normal irons (well, normal electronics irons, not your old Weller 100-watt pistol-grip).

Cats, coffee, chocolate...vices to live by
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