Crystal unit Product Number (please contact us) FC-135R : X1A000141xxxx00 FC-135 : Q1xFC1350xxxx00 FC-255 : Q1xFC2550xxxx00 kHz RANGE CRYSTAL UNIT FC - 135R FC - 135 / FC - 255 Frequency range : External dimensions : : Overtone order : Applications : 32.768 kHz (32 kHz to 100 kHz) 3.2 x 1.5 x 0.80 mm ***FC-135R/FC-135 4.9 x 1.8 x 0.80 mm ***FC-255 Fundamental Small communications devices Actual size FC-135R/FC-135 FC-255 Specifications (characteristics) Item Symbol Nominal frequency range f_nom Storage temperature T_stg Operating temperature T_use Level of drive 32.768 kHz 0.5 W (1.0 W Max.) Ti +25 C 5 C B -0.04 10-6 / C2 Max. Load capacitance CL Motional resistance (ESR) R1 50 k Max. Motional capacitance C1 3.4 fF Typ. Shunt capacitance C0 1.1 pF Typ. Frequency aging Conditions / Remarks Please contact us about available frequencies. Storage as single product. 0.5 W Max. Please contact us if you require 1.0W Max. +25 C, DL=0.1 W Please ask for tighter tolerance 7 pF, 12.5 pF Please specify 20 10-6 f_tol Parabolic coefficient Product name (Standard form) Specifications FC-135 FC-255 32 kHz to 32 kHz to 32.768 kHz 32.768 kHz 100 kHz 77.5 kHz -55 C to +125 C -40 C to +85 C DL Frequency tolerance (standard) Turnover temperature 7 pF, 9 pF, 12.5 pF f_age 70 k to 65 k Max. 45 k 3.7 fF to 3.4 fF Typ. 2.0 fF Typ. 1.6 fF 1.3 pF to 1.0 pF Typ. 1.3 pF Typ. 0.5 pF -6 3 10 / year Max. 70 k to 30 k 2.3 fF to 0.6 fF 1.7 pF to 0.9 pF 70 k Max. FC-135R 32.768000kHz 12.5 +20.0-20.0 Model Frequency Load capacitance(pF) +25 C, First year -6 Frequency tolerance(x 10 , +25 C) External dimensions (Unit:mm) 1.50.1 A501J 4.90.1 3.20.1 1.7 #1 0.80.1 C622J 1.80.1 FC-255 FC-135R / FC135 0.80.1 3.2 Internal Connection Internal Connection #1 #2 #1 #2 #2 #1 0.85 0.75 #2 Footprint (Recommended) (Unit:mm) 1.0 1.3 FC-255 2.5 Do not design any circuit patterns in the shaded area. 2.2 FC-135R / FC-135 1.8 . FC-135R 4.2 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Epson: FC-255 32.7680K-A FC-255 32.7680K-A0 FC-255 32.7680K-AG3 FC-255 32.7680K-A3