At 3.2 x 1.5 mm and a 0.9 mm profile, this is the smallest miniature watch crystal available. It is made for tight quarters, such as in portable or handheld devices. It has a frequency of 32,768 kHz, and the surface mount device offers a standard 12.5 pF load capacitance in the FX135A model, and an optional 9 pF capacitance in the FX135B. With a standard operating temperature of -40 to 85C (-40 to 185F), it has a frequency stability of -0.045 ppm/( C )2 and a frequency tolerance of +/-20 PPM at 25C (77 F). Turnover temperature range is 20 to 30C (68 F to 86 F) and storage temperature is -55 to 125C (-67 to 257F). It has a maximum equivalent series resistance of 50 k and insulation resistance of 500 M at 100 VDC. It has a gold-over-nickel finish, and aging is ±3 PPM per year. It is RoHS-compliant. The crystal comes standard in a 3,000-unit taps and reel.
Digital healthcare devices and wearable electronic products need to be thoroughly tested, lest they live short, ignominious lives, an expert will tell attendees at UBM’s upcoming Designers of Things conference in San Jose, Calif.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.