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Glossary  
Timing Devices , Sensing Devices Optical Devices Crystal Chip Package Specification/Characteristic
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
RD This is the symbol for drain resistance. See "crystal oscillation circuit".

Reference : Crystal oscillation circuit

RMS jitter A type of jitter defined in specification. See "jitter".

Reference : Jitter

RTC Abbreviation for "Real Time Clock". See "Real time clock".

Reference : Real-time clock

Random jitter A type of jitter defined in specification. See "jitter".

Reference :  Jitter

Real time clock A real time clock is a circuit or IC that generates digital data for times and dates, etc. from a reference clock. Usually, the reference clock is a 32.768 kHz crystal unit.

Reference : Real time clock module

Real time clock module A real time clock module is a crystal device incorporating into a single package a 32.768 kHz crystal unit and a real time clock IC. This module is used in computers and fax machines and other electronic equipment that requires time management functions. Not only do these modules to eliminate the need to design an oscillation circuit and the need to adjust a timepiece function, they also conserve space on the circuit board.


Reference : Real time clock

Recommended operating condition Each recommended operating condition is a parameter with a specified range for ensuring stable product characteristics over time.

Reflection wave front aberration Wave front aberration in a reflection path.

Reflow Reflow soldering is one method used to solder electronic devices to circuit boards. This method exposes devices to temperatures over +200 °C, so reflow soldering must be performed carefully, according to the reflow profile.

Reference : Reflow profile

Reflow profile The reflow profile specifies the temperatures and time periods to be set when using the reflow soldering method to mount electronic devices on circuit boards. Failure to follow these specifications can damage the electronic devices, such as by degrading their characteristics.

Reflow profile soldered product Pb free soldered product
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Reference : Reflow profile

Refractive Index It is the ratio of the speed of light in a vacuum to the speed of light in a medium. Snell's law is a generally known law applied to the refraction of light when light passes through one medium to the other.

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Rf This is the symbol for feedback resistance. See "crystal oscillation circuit".

Reference : Crystal oscillation circuit

Rp Amount of P-type polarized light on the reflection path after being reflected
from an optical component.

Rs Amount of S-type polarized light on the reflection path after being
reflected from an optical component.
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