32.768KHz Selection Guide 32.768 KHz OSCILLATORS Package Series ♦ FD51 ♦ ♦ ♦ ♦ RoHS 6/6 Compliant Features Exceptionally fast start-up <1mS VCXO version available Low profile 1.8V, 2.5V, or 3.3V LVCMOS AT Cut Crystal Used FD51 Part Number Builder ♦ ♦ Package Size Extreme precision and more rugged compared to watch crystal based timing devices Maintain precision throughout -40 to +85°C temp range (down to ±10ppm) 5 x 3.2 x 1.3h mm Frequency of AT Cut Crystal used in FD51 versus Temperature Response ♦ S3883 ♦ ♦ ♦ Fast start-up time of 500mS or less ♦ 1.5V to +5.0V Operating temp range: -10 to +60°C ♦ Extended temp avail (-40 to +85°C) Order as S3883E Enable/Disable function on pad 1 with low power consumption Watch Crystal (Tuning fork crystal, XY cut) used ♦ S3881 ♦ ♦ Start-up time of 3 seconds or less ♦ 1.3 to 5.5V ♦ Operating temp range: -40 to +85°C Low Profile Watch Crystal used (Tuning fork crystal, XY cut) 4 x 6.5 x 1.8h mm 2.5 x 4 x 1h mm 32.768 KHz CRYSTALS ♦ SM20S ♦ 4 pad plastic SMD ♦ Operating temp range: -40 to +85°C ♦ ♦ Watch Crystal used 12.5pF load capacitance Freq vs Temp performance below 3.8 x 8.5 x 2.5h mm ♦ SM8S ♦ 2 pad ceramic SMD ♦ Operating temp range: -40 to +85°C ♦ ♦ Watch Crystal used 12.5pF load capacitance Freq vs Temp performance below 1.5 x 3.2 x 1h mm Watch Crystal Frequency versus Temperature (Typical Performance): Pletronics, Inc. (425)-776-1880, Fax: (425) 776-2760, www.pletronics.com ©2008 Pletronics, Inc. ♦ Full spec sheets are available on the website. ♦ Additional options and package sizes are available and shown on our website. SG-008 REV B