Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Can MAX232 chip samples work one week without a break?

Status
Not open for further replies.

mmrkii

Newbie level 2
Joined
Nov 12, 2004
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
21
Max 232

I order a sample MAX232 chip from MAXIM for school project and i wrote some aplication for comunication with 16f84 via COM port.The problem is that i need to recive data from pic at least a one weak without a break.Is it posible for samples to work one weak without a break down.
 

Re: Max 232

Yes, samples are not less than the devices you buy.
 

Max 232

Probably you should apply for MAX220EPE that has wider operating temperature range -40°C to +85°C. In my opinion, if an IC has wider temperature range, it should be more resistant to performance degradation. Pls correct me if I'm wrong.

Assuming that all parts in the circuit work correctly, the IC should have no problem to do the job for ONE WEEK, which is not very long.

Furthermore, I don't think MAXIM or manufacturer will send lower quality product to customer for evaluation. The design of MAX232 is very matured already, so it should be bug free. If MAX232 is a new IC, then the sample might still have bug.
 

Re: Max 232

hey which country in u r is it so expensive there a max232 ? im brom bangladesh an asian country even here it costs like 50 us cents , if u need one can pm me , of course u hav to pay the postal costs :D
 

Re: Max 232

50 cents???? thats cheap in my country (Perú) it goes for about 9 dollars.
 

Re: Max 232

ful babu said:
hey which country in u r is it so expensive there a max232 ? im brom bangladesh an asian country even here it costs like 50 us cents , if u need one can pm me , of course u hav to pay the postal costs :D
wow in Bangladesh is $0.50 a piece? great.

In US costs $1.5 for a quantity for 1000 pieces you buy from Maxim. If you want to buy one it costs $4 a piece.

There is another alternative: texas instruments max232 and is cheaper.

enter max232 at https://www.digikey.com/ for search.

My guess is that even the sample chip you get from Maxim, would last 1 week. Why you guys do not try it and see it?
 

Re: Max 232

hi
even i got max232 as less as Rs.15 ($1/3)in india.only max233 is a bit costlier
 

Re: Max 232

MAX232 is a very old design..
I personally use MAX202 which is pin-to-pin raplacement for MAX232 but instead of using 10uF capacitors (4 of them) it uses 4 x 100nF ceramic.
Also, you should use Transient Voltage Suppressors for Tx and Rx lines. This will protect the IC against all spikes...the TVS have to be approximately 30Vdc bi-directional..
 

Max 232

MAX233A from Maxim
- no external components and are recommended for applications where printed circuit board space is critical.
But Max233A is not pin-compatible to Max232.
 

Re: Max 232

Thaks.You help me solve the problem.
Ciao
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top