Final answer:
An SR-type Latch has two inputs (Set and Reset) and can become undefined if both are activated simultaneously, while a D-type Latch has a single data input, ensuring stability through a clocking signal.
Step-by-step explanation:
The difference between an SR-type Latch and a D-type Latch lies in their input requirements and the stability of the output. An SR-type Latch, which stands for Set-Reset, is a simple memory device that has two inputs, labeled S (Set) and R (Reset). When the S input is activated (logic high), the latch output becomes set (logic high), and when the R input is activated, the output becomes reset (logic low). However, the SR-type latch can encounter an invalid condition when both S and R are activated simultaneously, leading to an undefined output state.
On the other hand, a D-type Latch, or Data Latch, simplifies this by having a single data input, labeled D. The D-type latch captures the value of the D input at a specific moment determined by a clock or enable signal. This ensures a stable output that avoids the undefined state possible with an SR-type latch. The D input is sampled during the active clock edge, and the output holds that value until the next sampling event.
Therefore, the main differences are the number of inputs and how the stable state is ensured. The SR-type latch requires careful manipulation to avoid invalid states, whereas the D-type latch operates more reliably under a clocked environment.