Difference in series 14031FV /1343KAK / 1412KR2

[koolguy]

Hello,
The pic16f72 i/sp under it there is printed format of this series, what does it mean??

 

[ronsimpson]

?

 

[koolguy]

Hi again,
what this mean in PIC
1. pic16f72 i/sp
14031FV

2. pic16f72 i/sp
1343KAK

1. pic16f72 i/sp
1412KR2

 

[Ian Rogers]

Batch No. probably... I never concern myself with it!!

 

[koolguy]

Actually i have 10-12 Pic16f72 with these code.
There are not working as per codes some times free work after re-programming it get work, so i just look on them for knowing it in deep!
Here is the code...
with 6V powers supply, 20Mhz and 22pF Cap at osc.

#include <htc.h>

__CONFIG( BOREN_OFF & PWRTE_ON & WDTE_OFF & FOSC_HS);

#define _XTAL_FREQ 20000000

main(){
 
TRISB=0x00;
PORTB=0x00;
__delay_ms(400);
    while(1){
        PORTB=0x00;
__delay_ms(400);

        PORTB=0xff;
__delay_ms(400);


     





}

 

[Tony Stewart]

1343KAK 2013 week 43 Factory batch KAK
1412KR2 2014 week 12 Factory batch KR2

This is for quality trace-ability

 

[koolguy]

Hello,
what is this factory batch??

 

[koolguy]

Hello,
The PIC are fine working in Programmer.
In my circuit there is 4 PIC16f72, in of this 1st and 3rd are working.
the 2nd and 4th is not working at all.
I have checked connection all are fine but i don't understand, what is the hiding problem in it??

 

[Tony Stewart]

A company may have a Letter assigned to each factory and machine and batch code of the epitaxial wafers.

 

[koolguy]

Hello,
Ok, this are manufactured in other factory too??