kHz Range Crystal Oscillators Clock Oscillators Surface Mount Type KC2520B Series(32.768kHz) CMOS/ 1.8V, 2.5V, 3.3V, 5.0V Compatible/ 2.5×2.0mm Features • Miniature ceramic package 2.5 (L) ×2.0 (W) ×0.7 (H) mm (Typ.) • Highly reliable with seam welding • CMOS output • Supply voltage 1.8/ 2.5/ 3.3/ 5.0V Wide operating voltage range 1.6 to 5.5V • Low current consumption Applications • Watches How to Order KC2520B 32K7680 C M 2 E 00 ① ② ③④⑤⑥ ⑦ ① Type (2.5×2.0mm SMD) ② Output Frequency (32.768kHz) ③ Output Type (CMOS) ④ Supply Voltage (1.8V, 2.5V, 3.3V, 5.0V Compatible) ⑤ Frequency Tolerance (See Specifications) ⑥ Symmetry/ INH Function (45/ 55%, Stand-by) ⑦ Customer Special Model Suffix (STD Specification is “00”) RoHS Compliant Packaging (Tape & Reel 2000 pcs./ reel) Specifications Item Symbol Output Frequency Range fo Frequency Tolerance Initial (25°C), Stability (−40 to 85°C), Voltage change Aging (@1year) Other (load change, shock and vibration) f_tol Storage Temperature Range Operating Temperature Range Max. Supply Voltage Supply Voltage Current Consumption (Maximum Loaded/ 1.6≤VCC≤2.0V) Current Consumption (Maximum Loaded/ 2.0<VCC≤2.8V) Current Consumption (Maximum Loaded/ 2.8≤VCC≤3.63V) Current Consumption (Maximum Loaded/ 3.63≤VCC≤5.5V) Stand-by Current Symmetry Rise/ Fall Time (10% VCC to 90% VCC Maximum Loaded) Low Level Output Voltage High Level Output Voltage Output Load Low Level Input Voltage High Level Input Voltage Disable Time Enable Time Start-up Time Specifications Min. Max. 32.768 −25 +25 −3 +3 −4 +4 −55 +125 −40 +85 −0.3 +7.0 +1.6 +5.5 Conditions T_stg T_use — VCC Units kHz ×10−6 °C °C V V — 120 — 126 — 130 — 140 — 45 10 55 μA % — 50 ns — 90% VCC — — 70% VCC — — — 10% VCC — 15 30% VCC — 100 2 5 μA ICC I_std SYM @50% VCC tr/ tf VOL VOH L_CMOS VIL VIH t_dis t_ena t_str IOL=1mA IOH=−1mA CMOS Output @Minimum operating voltage to be 0 sec. V pF V ns ms ms Note: All electrical characteristics are defined at the maximum load and operating temperature range. Dimensions (Unit: mm) Recommended Land Pattern 2.5 (Unit: mm) #2 #1 0.95 Plating: Ni+Au Tolerance: ±0.1 1.45 #4 0.6 #3 0.6 2.0 0.6 1.85 0.7 0.9 0.7 0.7 0.15 0.15 Pad Connections #1 INH #2 Case GND #3 Output #4 VCC INH Function Pad1 Pad3 (Output) Open Active "H" Level Active "L" Level High Z (No-Oscillation) 1.05 Note: A capacitor of value 0.01μF between VCC and GND is recommended.