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74ls14 instead of 74hc14 for data cable? Plz help!

M

Mike

Jan 1, 1970
0
I'm not too good with electronic components. That is I don't
understand much about them, but I can follow instructions well and I
got excellent soldering skills ;). I'm trying to make a data cable
for my cell phone but I have a slight problem that only you guys can
help me with. The schematic calls for a 74hc14 IC, but all I can get
my hands on locally is a 74ls14. I am unsure of the difference, so
could someone tell me if they work the same and if there are any
differences. Thanks.
 
S

Spehro Pefhany

Jan 1, 1970
0
I'm not too good with electronic components. That is I don't
understand much about them, but I can follow instructions well and I
got excellent soldering skills ;). I'm trying to make a data cable
for my cell phone but I have a slight problem that only you guys can
help me with. The schematic calls for a 74hc14 IC, but all I can get
my hands on locally is a 74ls14. I am unsure of the difference, so
could someone tell me if they work the same and if there are any
differences. Thanks.

Get an HC14, even if you have to mail-order it.

Best regards,
Spehro Pefhany
 
L

Leon Heller

Jan 1, 1970
0
Byron A Jeff said:
-On 16 Jul 2003 09:58:33 -0700, the renowned [email protected]
-(Mike) wrote:
-
->I'm not too good with electronic components. That is I don't
->understand much about them, but I can follow instructions well and I
->got excellent soldering skills ;). I'm trying to make a data cable
->for my cell phone but I have a slight problem that only you guys can
->help me with. The schematic calls for a 74hc14 IC, but all I can get
->my hands on locally is a 74ls14. I am unsure of the difference, so
->could someone tell me if they work the same and if there are any
->differences. Thanks.
-
-Get an HC14, even if you have to mail-order it.

Agreed. The HC14 will output a 5V signal while the ls14 only guarantees
2.4V

A pull-up resistor would solve that problem.

Leon
 
S

Spehro Pefhany

Jan 1, 1970
0
2.4V

A pull-up resistor would solve that problem.

Sure, then we have to worry about loading (is there an RC on the
input?), supply voltage range (2-6V for HCMOS), different input
thresholds etc. etc.

Best regards,
Spehro Pefhany
 
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