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.

Register Log in

Using a 74HC595 serial/parallel register with a single clock

Status
Not open for further replies.
Q

quintosardo

Newbie level 3
Joined
Jul 3, 2006
Messages
4
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,283
Activity points
1,315
Hi,
did anybody try to use a 74HC595 connecting together the shift and the latch clock to use only two wires (data and clocks)?
I'm trying to do this but I have strange results until the chip gets locked (the output doesn't change).

Any suggestion?

Thanks

Quinto
 

Hi
To run 74HC595 you must have at least 3 wires that includes serial data input,latch and shift.Unfortunately 74HC595 doesnt run properly with two wires.My advise that;dont forget to add third wire(serial data input) good luck;-)
 

Re: Using a 74HC595 serial/parallel register with a single c

Beacause of above reasons, you should use 4094, that meet your demand.
Good luck,
 

Re: Using a 74HC595 serial/parallel register with a single c

I've solved the problem.
There was a bug in communication code.

Now I can drive the 595 with those 2 wires:

- serial data input
- shift and latch clocks tied together

I had to add one more clock up/dw because, as the datasheet says, latch clock is one step behind the shift clock, when tied together
 
if you do like you say,595 as 74ls164
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top