Crystal Units vs. IC Matching Search

Recommended Circuit


Manufacturer Renesas Electronics
Part Number R5F5621xx
Family RX621

Crystal Units

Part Number CX8045GA04000H0QRT02
Size (mm) 8.0x4.5x1.8
Frequency (MHz) 4
Overtone Order Fundamental
Load Capacitance (pF) 12

Recommended Circuit Constant

Rf (Ω)
Rd (Ω)
Rx (Ω)
Cx1 (pF) 18
Cx2 (pF) 18
Ccomp (pF)
Negative Resistance (Ω) -10094
Circuit Load Capacitance (pF) 13.58
Frequency Tolerance (1x10-6) -10.25
Level of Drive (µW) 75
Motional resistance of crystal units used in measurement (Ω) 79.61

*A product of representative frequency is used as image.

Circuit Diagram
Circuit Diagram

*Even though the above recommended circuit and constants are verified by KYOCERA, the optimum values may vary depending on the actual design.
*IC part numbers and company names are trademarks or registered trademarks of the respective owners.

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