时钟/计时 - 可编程计时器和振荡器 

A timer is a specialized type of clock for measuring time intervals.[1] By function timers can be categorized to two main types. A timer which counts upwards from zero for measuring elapsed time is often called a stopwatch; a device which counts down from a specified time interval is more usually called a timer[1] or a countdown timer. A simple example for this type is an hourglass. By working method timers have two main groups: Hardware and Software timers. Clock/Timing - Programmable Timers and Oscillators are in stock at Tenco Electronics. Tenco offers inventory, pricing, & datasheets for Clock/Timing - Programmable Timers and Oscillators. To know more, please view our large section of Clock/Timing - Programmable Timers and Oscillators below.