32.768 KHz CLOCK OSCILLATORS “LPO57 Series” Logic: CMOS 5x7 mm Wave Form: Square wave MERCURY Since 1973 LPO57 (5x7x1.4 mm) is a 32.768 KHz clock oscillator designed specifically for battery operated portable or hand-held consumer electronic devices where real time clock timing is required and board space is at a premium. Low current consumption (6 uA at 3.3 V), wide operating voltage (from 1.5 V to 6 V), space saving and cost-effective make LPO57 an ideal choice of precise timing. General Specifications TA=+25°C, VDD at specified voltage, CL=15 pF Product Series Frequency Input Voltage (VDD) Output Logic Frequency Calibration Tolerance Frequency Stability LPO57 32.768 KHz +1.5 V D.C. to +6.0 V D.C. Voltage code “15”: VDD = +1.5 V D.C. ±10 % Voltage code “18”: VDD = +1.8 V D.C. ±10 % Voltage code “2”: VDD = +2.0 V D.C. ±10 % Voltage code “27”: VDD = +2.7 V D.C. ±10 % Voltage code “3” VDD = +3.3 V D.C. ±10 % Voltage code “5”: VDD =+5 V D.C.±10 % CMOS Tolerance code “P”: ±10 ppm at +25°C Tolerance code “A”: ±25 ppm at +25°C (standard) Tolerance code “B”: ±50 ppm at +25°C Tolerance code “C”: ±100 ppm at +25°C Please refer to the parabolic curve shown below -60 ppm max. when operating at 0°C to +70°C -200 ppm max. when operating at -40°C to +85°C. For higher stability requirement, please see note below. Output Voltage HIGH “1”; VOH Output Voltage LOW “0”; VOL Rise Time / Fall Time Duty Cycle (Symmetry) Start-up Time (Ts) Load Current Consumption Pad 1 Options Aging Packaging PRELIMINARY (1) +0.9*VDD min. +0.1*VDD max. 200 n sec. max. when measured from (10% VDD ↔ 90% VDD) 45% min; 55% max. measured at 50% VDD 500 m sec. typical at +3.3 V 15 pF See current consumption vs VDD chart below Output is high impedance if pad 1 is connected to ground. 32.768 KHz output if pad is connected to VDD or not connected. ±5 ppm per year max. 16 mm tape; 8 mm pitch; 1000 pcs per reel. (1) Negative frequency drifting is due to the X-cut tuning fork crystal 32.768 KHz. If tighter frequency stability (±10 ppm or ±25 ppm over 0°C to +70°C or wider) is required please consider using H57-32.768K series, where AT-cut crystal is used and the current consumption is in the mA range. For ±1 ppm to ±5 ppm frequency stability please consider using VM57T-32.768K (VCTCXO) or M57T-32.768K (TCXO) series products. MERCURY www.mercury-crystal.com Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: [email protected] U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: [email protected] MERCURY Page 1 of 3 Date: Jan. 23, 2005 Rev. 0 32.768 KHz CLOCK OSCILLATORS “LPO57 Series” Logic: CMOS 5x7 mm Wave Form: Square wave FREQUENCY TEMPERATURE CHARACTERISTIC CURVE (Parabolic Curve) MERCURY Since 1973 CURRENT CONSUMPTION vs VDD CHART Typical Max. LPO57 Current Consumption Current (uA) 20 15 10 5 0 1.5 Environmental Performance Specifications RoHS Compliance Storage temp. range Humidity Hermetic seal Solderability Reflow Vibration Shock 2 2.5 3 3.5 4 4.5 Supply Voltage VDD Pb (lead) free -55 to +125°C 85% RH, 85°C, 48 hours Leak rate 2x10-8 ATM-cm3/sec max. MIL-STD-202F method 208E 260°C for 10 sec. MIL-STD-202F method 204, 35G, 50 to 2000 Hz MIL-STD-202F method 213B, test condi. E, 1000GG ½ sine wave Part Number Format and Example: Example: 18LPO57-AT-32.768K Explanation: LPO57 clock oscillator, +1.8 V supply voltage, ±25 ppm frequency tolerance (at+25°C), Tri-state option on pad 1, 32.768 KHz. " 18 LPO57 — " " A T — 32.768K n o p q r n: Voltage codes: “18” for +1.8 V; “2” for +2.0 V; “3” for +3.3 V. See more voltage codes above. o: Product series p: Frequency Calibration Tolerance code: “P”,“A”,”B” or “C”. See tolerance codes above. q: “T”: Tri-state option on pad 1 (Tri-state is standard if not specified), leave blank if tri-state is not required. r 32.768 KHz. MERCURY Page 2 of 3 Date: Jan. 23, 2005 Rev. 0 5 32.768 KHz CLOCK OSCILLATORS “LPO57 Series” Logic: CMOS 5x7 mm Wave Form: Square wave LPO57 OUTPUT WAVEFORM: MERCURY Since 1973 LPO57 Test Circuit: Tf Tr VOH 90% Vcc i VOL 10% Vcc max. TH T Duty Cycle = (TH / T)x100% LPO57 Package Dimensions and Recommended Pad Layout: [0.024] 0.6 3 Pad 2 Pad 3 Pad 4 Tri-State or No Connection Ground Output Supply voltage 3 2 R0 .7 4 1 5.08 [0.200] typical bottom view 2.2[0.086] 1.8[0.071] 0.55 [0.022] Pad 1 [0.004] 0.1 2 1.8±0.2 [0.071±0.008] 1 [0.049] 1.25 _ LPO57_ 32.768 KHz MEC [0.055] 1.4 2.0[0.079] [0.197±0.006] 5.00±0.15 4 [0.275±0.006] 7.00±0.15 unit mm[inches] 5.08 [0.200] Chamfered pad is pad No. 1. Count counter-clockwise when looking at top view. Count clockwise when looking at bottom view. MERCURY Page 3 of 3 Date: Jan. 23, 2005 Rev. 0