拖鞋 ：
触发器是一种基本的数字存储器电路，它存储一位信息。触发器是大多数时序电路的基本模块。它也被称为双稳态多谐振荡器或二进制或一位存储器。触发器用作时序电路中的存储元件。
输出是从组合电路或触发器或两者的时序电路中获得的。触发器的状态在时钟脉冲处于活动状态时发生变化，而在时钟脉冲未处于活动状态时不受影响。特别地，时钟控制的触发器在同步时序电路中用作存储元件，而非时钟控制的触发器(即，锁存器)用作异步时序电路中的存储元件。
闩锁：
闩锁是一种电子设备，它根据应用的输入立即改变其输出。它用于在任何指定时间存储 1 或 0。它由两个输入即“SET”和 RESET 以及两个输出组成，它们相互补充。
触发器和锁存器的区别：
| SNO | Flip-flop | Latch |
|---|---|---|
| 1 | Flip-flop is a bistable device i.e., it has two stable states that are represented as 0 and 1. | Latch is also a bistable device whose states are also represented as 0 and 1. |
| 2 | It checks the inputs but changes the output only at times defined by the clock signal or any other control signal. | It checks the inputs continuously and responds to the changes in inputs immediately. |
| 3 | It is a edge triggered device. | It is a level triggered device. |
| 4 | Gates like NOR, NOT, AND, NAND are building blocks of flip flops. | These are also made up of gates. |
| 5 | They are classified into asynchronous or synchronous flipflops. | There is no such classification in latches. |
| 6 | It forms the building blocks of many sequential circuits like counters. | These can be used for the designing of sequential circuits but are not generally preferred. |
| 7 | a, Flip-flop always have a clock signal | latche doesn’t have a clock signal |
| 8 | Flip-flop can be build from Latches | Latches can be build from gates |
| 9 | ex:D Flip-flop, JK Flip-flop | ex:SR Latch, D Latch |