Product Lines

20 series – Miniature Alarm Clock Module
Mini Clock and Timer Module

20D-A0N-MS

mini clock and timer module - 99M59S

Product Descriptions
This is a mini clock module with countdown timer. The countdown capacity is 99 minutes, and 59 seconds. Available in 12 hr and 24 hr versions.
The physical size of this mini clock module is 35 x 18.4 mm. A piece of LR44 button cell battery is mounted at the rear side of the clock module. However, it is possible to connect the power to external sources.

This ideal mini clock and timer module is prepared to be installed to any device, which real time and countdown timer are required. Instead of countdown feature for timer, count up feature is available too. Therefore, it can can be used as a chronometer too.

This clock timer module is equipped with 6 rubber keys. The "clock" key is used to switch into clock mode from timer. The "set" key is used to enter setting mode of hour or minute of real time. While "adjust" key is applied to change the reading of hour and minute. Another three keys are designed for countdown timer mode. As well as "minute" key, the "second" key is used to adjust second. As well as to be used to enter timer mode, the "start/stop" key is applied to activate or halt the timer to countdown or count up.

Instead of 99 minutes 59 seconds, there are two other versions of counting capacities for timer. The choice are as:

99H59M for 20D-A0N-HM
99D23H for 20D-A0N-DH
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data sheet (306 KB)
Specifications
  1. Physical Size
    • Plastic Frame - 35 x 18.4 mm
    • Module Thickness - 10.1 mm (including battery)
  2. LCD
    • Screen - 20 x 10.92 mm
    • Number of Digit - 4 Digits
    • Digit Height - 7.0 mm
  3. Button: “clock”, “set”, and “adjust” for clock mode; “start/stop”, “min”; and “sec” for timer mode
  4. Electrical Specification
    • Power Source - 1.50 volts, 1 pc of LR44, or external connection
    • Operating Voltage - +1.20 ~ + 1.70 volts
    • Current Drain - less than 3μA
    • Operation Temperature - -10 ~ +50 ℃
    • Storage Temperature - -20 ~ +60 ℃

Relevant Information