ben123
Junior Member level 3
i bought 24256 eeproms.
they are only responding i2c device code A0, other codes A2,A4,A6,A8 .. etc not work. i have pcb with six 24lc256 (device code from A0 to AA. )
i put one 24256 to A0 socket eveything is ok.
then i move same part to A2 it still responds as A0. A4,A6,A8,AA still same. it still responds to A0.
24lc256 eeproms have tree pins to select device address. all of them connected to +5V, every of them responds to A0 device code.
today i buy four part to test from another shop. nothing changed.
i removed an older 24256 produced by Microchip from one of my circuits, and test with that one everything ok.
these problematic parts are marked as:
PHIL N
24256 8
LP6135 //not 8135
and bottom side
24256NC
M112854
i looked to philips web site, no information. i searched for datasheet, no chance.
do you know anything about this?
they are only responding i2c device code A0, other codes A2,A4,A6,A8 .. etc not work. i have pcb with six 24lc256 (device code from A0 to AA. )
i put one 24256 to A0 socket eveything is ok.
then i move same part to A2 it still responds as A0. A4,A6,A8,AA still same. it still responds to A0.
24lc256 eeproms have tree pins to select device address. all of them connected to +5V, every of them responds to A0 device code.
today i buy four part to test from another shop. nothing changed.
i removed an older 24256 produced by Microchip from one of my circuits, and test with that one everything ok.
these problematic parts are marked as:
PHIL N
24256 8
LP6135 //not 8135
and bottom side
24256NC
M112854
i looked to philips web site, no information. i searched for datasheet, no chance.
do you know anything about this?