Author Topic: max3002 level shifter. (Read 2202 times)

insomartin · « **on:** August 17, 2009, 02:22:10 AM »

mga master anong substitution for a max 3002 level shifter. para mag usap yung pic to zilog's 3.3 volt.
maraming salamat!

Philippine Electronics Forum · « **on:** August 17, 2009, 02:22:10 AM »

insomartin · « **Reply #1 on:** August 17, 2009, 09:49:15 AM »

Philippine Electronics Forum · « **Reply #1 on:** August 17, 2009, 09:49:15 AM »

insomartin · « **Reply #2 on:** August 17, 2009, 10:13:50 AM »

guys! help naman!

Philippine Electronics Forum · « **Reply #2 on:** August 17, 2009, 10:13:50 AM »

mArKhAo · « **Reply #3 on:** August 17, 2009, 10:34:35 AM »

hnd ba po pwd max232

Philippine Electronics Forum · « **Reply #3 on:** August 17, 2009, 10:34:35 AM »

marcelino · « **Reply #4 on:** August 17, 2009, 10:34:49 AM »

max3232?

wait...

Philippine Electronics Forum · « **Reply #4 on:** August 17, 2009, 10:34:49 AM »

marcelino · « **Reply #5 on:** August 17, 2009, 10:38:42 AM »

di pala pwede!!! hehehehe...
1.2V pala yan!

substitute: max3000 or max3001 or max3003

pero na mention mo na 3.3V... so max3232 yan.

or gawa ka nalang... i wonder, pwedeng gawin yung dalawang transistor sa 1.2V? hmmm..

pwede patingin ng circuit na gagamitan mo? yung tx/rx lang ba?

mArKhAo · « **Reply #6 on:** August 17, 2009, 10:40:09 AM »

max 3232 pala.. hehe madami ako nyan

marcelino · « **Reply #7 on:** August 17, 2009, 10:47:44 AM »

ako, medyo madami-dami din... mostly, soic.

mArKhAo · « **Reply #8 on:** August 17, 2009, 10:54:24 AM »

hehe... alam ko kung bakit...

insomartin · « **Reply #9 on:** August 17, 2009, 10:57:53 AM »

medyo natagalan. eto po

insomartin · « **Reply #10 on:** August 17, 2009, 10:59:05 AM »

baka nga pwede transistor na lang... pero clueless ako paano?

marcelino · « **Reply #11 on:** August 17, 2009, 11:14:12 AM »

Quote from: Martin on August 17, 2009, 10:57:53 AM

medyo natagalan. eto po

spi yan di ba???

di pala pwede ang max3232, voltage level translator pala ang max3002. maghanap ka nalang ng substitute at mag-experiment. kung wala kang makuha,ang alam ko meron ding mga level translator yung mga sn74*something*...

marcelino · « **Reply #12 on:** August 17, 2009, 11:16:16 AM »

oh... optoisolator!!!

insomartin · « **Reply #13 on:** August 17, 2009, 11:32:15 AM »

oo nga! may optoisolators pa ako sa junkbox ko. hehehe. thanks!
try ko gumawa nang card reader mas mura na kasi sa eeprom. 1gb pa! ewan ko lang kung gagana. gulp.
then zilog na ircboard kasi yung isa na 3.3 then yung pic 16f84 low level dirty work motor controls.
thanks! hihihihi panalo.

Nat-O · « **Reply #14 on:** August 17, 2009, 12:22:27 PM »

Ano ba problema mo? ang circuit mo gumagamit ng 3.3V. Max3002 can run from 2.1V to 5.5V as per datasheet

insomartin · « **Reply #15 on:** August 17, 2009, 12:27:41 PM »

price and availability nang max3002. that's my problem. i'm making a mcu kit. if i can't make it lower than 50 pesos. ewan ko na lang.
max3002 is 300.00 php sa farnel.

rdpzycho · « **Reply #16 on:** August 17, 2009, 01:08:37 PM »

IIRC, may na-post na si sir zerowing ng 5V to 3.3V translator dito sa forum. 5V to 3.3V - resistive divider. 'yung 3.3V to 5V - common base amplifier.

sa ibang MCU, tanggap na high 'yung 3.3V kaya 'yung divider lang from 5V to 3.3V ang kailangan. kung SD 'yung card, IIRC, 'di 5V tolerant ang SD. pero meron ding devices na 5V tolerant kahit 3.3V 'yung system.

Nat-O · « **Reply #17 on:** August 17, 2009, 01:25:00 PM »

Pwede mong direct connect ang 3.3 to 5V... anyway 3.3 is considered high. Tulad ng unang post, voltage divider sa 5V to 3.3V. Kelangan mo ba ng isolation sa application mo?

insomartin · « **Reply #18 on:** August 17, 2009, 01:39:07 PM »

i'm just making sure that everything is on the 3.3v threshold. di ko mahanap yung post ni sir zerowing. grrrr

insomartin · « **Reply #19 on:** August 17, 2009, 01:43:46 PM »

for mcu's that accept's 3.3 as high it's ok. but not everyday and everything works that way po.
i can't show to everyone that this works everytime. i'll hear badwords sa mga gagamit nito. (hey! bkit 3.3v to diba dapat 5v ang high?)
yung eeprom is 3.3 tapos mcu na gamit mo is 5v? magulo sir. mabuti nang safe.
5V to 3.3V - resistive divider. 'yung 3.3V to 5V - common base amplifier is great for now it would suit my needs.
thanks mga master. Maraming Salamat.

Philippine Electronics Forum · « **Reply #19 on:** August 17, 2009, 01:43:46 PM »

Author Topic: max3002 level shifter. (Read 2202 times)

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