2. Latches Chapter 14 Subject: Digital System Year: 2009

3. 3 Overview Using logic gates to construct basic latches Explain the different between an S-R Latch and D Latch

4. Latches The latch is a type of temporary storage device that has two stable states (bistable) and is normally placed in a category separate from that of flip-flops. Latches are similar to flip-flops because they are bistable devices that can reside in either of two states using a feedback arrangement, in which the outputs are connected back to the opposite inputs. The main difference between latches and flip-flops is in the method used for changing their state. Bina Nusantara University 4

5. S-R (Set-Reset) Latches Bina Nusantara University 5

6. S-R (Set-Reset) Latches Bina Nusantara University 6

7. S-R (Set-Reset) Latches Bina Nusantara University 7

8. 74LS279 Bina Nusantara University 8

9. Application Bina Nusantara University 9

10. The Gated S-R Latch Bina Nusantara University 10

11. The Gated D Latch Bina Nusantara University 11