D flip flop with Latch Enable

[Ranjith]

Hello Everyone,

This may sound really stupid, but i have to learn it from someone. I
wanted to know how to design a D flip flop with latch enable.

regards,
ranair123
student.

 

[Ken Smith]

In article <hlsu50dnp9skc666o5duioa7d07892iftr@4ax.com>,
Jim Thompson <thegreatone@example.com> wrote:

On Mon, 22 Mar 2004 15:00:30 -0800, "Tim Wescott"
tim@wescottnospamdesign.com> wrote:


"Ranjith" <ranair123@softhome.net> wrote in message
news:72fd1051.0403221234.25fec44@posting.google.com...
Hello Everyone,

This may sound really stupid, but i have to learn it from someone. I
wanted to know how to design a D flip flop with latch enable.

Old TI logic data books are best. I keep a set so I can build logic
at the device level when I need some for my ASICs.

In this case "old" means by about 20 years. They were nice hard bound
books and showed what was inside the chip.

By 1988 TI had started to loose their minds.. They switched to a
different sized book, wwnt with a soft cover book that wont stand on its
own and started using the silly fool block symbols for logic gates instead
of the "shield" shaped symbols.

--
--
kensmith@rahul.net forging knowledge

 

[Tim Wescott]

"Ranjith" <ranair123@softhome.net> wrote in message
news:72fd1051.0403221234.25fec44@posting.google.com...

Hello Everyone,

This may sound really stupid, but i have to learn it from someone. I
wanted to know how to design a D flip flop with latch enable.

regards,
ranair123
student.

Look at 74xx series data sheets for similar parts. I know National
Semiconductor used to give logic diagrams for these that was pretty
instructive -- perhaps they still do.

 

[Jim Thompson]

On Mon, 22 Mar 2004 15:00:30 -0800, "Tim Wescott"
<tim@wescottnospamdesign.com> wrote:

"Ranjith" <ranair123@softhome.net> wrote in message
news:72fd1051.0403221234.25fec44@posting.google.com...
Hello Everyone,

This may sound really stupid, but i have to learn it from someone. I
wanted to know how to design a D flip flop with latch enable.

regards,
ranair123
student.

Look at 74xx series data sheets for similar parts. I know National
Semiconductor used to give logic diagrams for these that was pretty
instructive -- perhaps they still do.

Old TI logic data books are best. I keep a set so I can build logic
at the device level when I need some for my ASICs.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

Throughout the history of this great country there have actually
been people of only two political persuasions: fighters and yellow-
bellies. WE MUST NOT LET THE LATTER PREVAIL IN THE NEXT ELECTION!

 

[Kevin Weddle]

You should just purchase the device. There is a pulse transistion
detector in a flip flop which can be difficult to build. After that,
you can use the input nand gates as the enable.

 

[mike]

Ranjith wrote:

Hello Everyone,

This may sound really stupid, but i have to learn it from someone. I
wanted to know how to design a D flip flop with latch enable.

regards,
ranair123
student.

As always, it depends on what you're trying to accomplish.
Typically, a J-K flip-flop will toggle if both J and K
are high. Check device specs to confirm.
mike

--
Return address is VALID.
Bunch of stuff For Sale and Wanted at the link below.
Toshiba & Compaq LiIon Batteries, Test Equipment
Honda CB-125S $800 in PDX
Yaesu FTV901R Transverter, 30pS pulser
Tektronix Concept Books, spot welding head...
http://www.geocities.com/SiliconValley/Monitor/4710/