EURO QUARTZ EME83 SERIES TCXO Low Power (nA Current Consumption) 32.768kHz FEATURES EME83x is a 32.768kHz CMOS output TCXO with a maximum frequency stability of ±5ppm (±2.62 minutes / year) over the operating temperature range -40° to +85°C. This time-keeping accuracy is outstanding in the industry. A proprietary temperature compensation technique is applied to the built-in X-Cut 32.768kHz tuning fork crystal and temperature sensor. A 400nA current compensation (average fOUT ≤128Hz, 4 min TMP.) makes it ideal for battery operated devices. The TCXO is packaged in a 7 x 5 x 1.8mm package, ideal for miniaturized applications. Designed for long-term frequency reference applications. APPLICATIONS · · · · · · Frequency Reference for real time clocks (RTC). Portable instrumentation. Timing synchronization for networks, servers, hubs, routers and switches. Timing Reference input for various energy metering ICs. Smart metering, data loggers. GPS receivers, telematics. RELATED EUROQUARTZ PRODUCTS · · If temperature compensation is not required please consider using Euroquartz HA series 32.768kHz (AT-CUT crystal, µA current consumption, ±25/±50/±200ppm over commercial or industrial temperature ranges). If tighter than ±5ppm frequency stability is required, i.e. ±1~±2.5ppm over -40° to +85°C, please consider use of EM572T 32.768kHz TCXO or VEM572T 32.768kHz VCTCO series. (All use AT-Cut crystals, mA current consumption.) FREQUENCY-TEMPERATURE CHARACTERISTICS EME83x, Temperature Compensated. ∆f/f = ±5ppm max. Not Temperature Compensated. ∆f/f = -0.035(To-25)2 Page 1 of 5 EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ EME83 SERIES TCXO 32.768kHz Low Power (nA Current Consumption) GENERAL SPECIFICATIONS (at 25°C and specified input voltage) Product Series EME831, EME832, EME833 and EME834 Temperature Measurement Period (TMP), Also known as Compensation Interval. EME831 EME832 EME833 EME834 Every 1 minute Every 2 minutes Every 30 seconds Every 4 minutes (standard series) Overall power consumption increases for more frequent measurement periods. For lowest power consumption the 4 minute measurement period (model EME834) is recommended. For peak current during temperature measurement see IDD data below Standard frequency: 32.768kHz Frequency Also available in 4.096kHz, 1.024kHz, 128Hz, 32Hz, 1Hz, 1/10Hz, 1/60Hz. Supply Voltage (VDD) Range 1.7V minimum, 5.5V maximum 1.8V ±5% 2.5V ±5% 3.0V ±5% 3.3V ±5% 5.0V ±5% 1.71V ~ 1.89V 2.37V ~ 2.62V 2.85V ~ 3.15V 2.97V ~ 3.63V 4.75V ~ 5.25V 18 25 3 33 5 Supply Current (IDD1) Typical Conditions: No load, 25°C, fOUT = 32.768kHz 0.79µA 1.05µA 1.25µA 1.37µA 2.05µA Peak Current during Temperature Measurement (IDD2) Typical. Conditions: No load, 25°C, fOUT = 32.768kHz 1.95µA 2.0µA 2.03µA 2.05µA 2.14µA Supply Current (IDD3) when Pad 1 is disabled. Typical Conditions: No load, 25°C, fOUT = 32.768kHz 0.39µA 0.47µA 0.53µA 0.56µA 0.80µA Supply Current (IDD4) Typical Conditions: No load, 25°C, fOUT = 32Hz 327nA 408nA 460nA 470nA 700nA Supply Voltages (VDD) (VDD) Tolerance Voltage Code Initial Calibration Tolerance ±1.5ppm maximum over -40° to +85°C w.r.t. fO at +25°C ±5ppm maximum over -40° to +85°C w.r.t. fO at +25°C Frequency Stability (ppm) over temperature Timing Error over Time Per day ±0.432 s/day max. Per month ±12.960 s/month max. Per year ±2.628 minutes/year max. Frequency Stability vs. Ageing ±3ppm/year maximum first year at 25°C vs. Load Change ±0.2ppm max. for a 10% load condition change vs. Reflow ±1ppm max. 1 reflow and measured 24 hours afterwards vs. All range of VDD (∆f/V) ±1ppm/Volt max. VDD = 1.7V to 5.5V. Supply Voltage Variation (∆VDD) 0.25 V max. Supply voltage stability at specified VDD. Condition ∆V / ∆t = 1 V/µs Output Wave Form CMOS Square Wave Output Load 15pF Page 2 of 5 EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ EME83 SERIES TCXO Low Power (nA Current Consumption) Output Voltage Levels VOH VDD - 0.4V min. IOH = -0.1mA, all VDD range VOL 0.4V max., IOL = 0.1mA, all VDD range Rise Time (tR) and Fall Time (tF) 100 ns max., at 20% to 80% of waveform. 15pF load. Start-up Time (TS) 1ms max., at +25°C; 3ms max. over -40° to +85°C 32768Hz, 4096Hz & 1024Hz: 50%±10% max. Duty Cycle (Symmetry) 128Hz, 32Hz, 1Hz, 1/10Hz, 1/60Hz: 50% ±5% max. 32.768kHz Measured at 50% of VDD over -40° to +85°C Vih = 0.8 *VDD Pin 1 OE Thresholds Vil = 0.2*VDD ENVIRONMENTAL PERFORMANCE and SPECIFICATIONS Green Compliance RoHS Compliant, Pb (lead) free in accordance with EU Directive 2002/95/EC Moisture Sensitivity Level MSL = 1. According to IPC/JEDEC J-STD-020D.1 Humidity 85% RH, 85°C for 48 hours Hermeticity Leak rate 2 x 10-8 ATM-cm3/s maximum. Solderability MIL-STD-202F method 208E Vibration MIL-STD-202F method 204, 35G, 50 to 2000Hz Shock MIL-STD-202F method 213B, test condition E, 1000g ½ sinewave Electrostatic Sensitivity 2kV minimum, Human Body Model (HBM) according to IEC 610000-4-2 Contact Pad Surface Finish 0.3 ~ 1.2µm gold over 1.27 ~ 8.89µm nickel Solder Reflow 20s masx at peak temperature of 260°C. Two reflows maximum Weight of the device 0.196 grams typical ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD) -0.5V minimum, 6.5V maximum VSS = 0V Ambient Temperature Range -40° to +85°C Storage Temperature Range -40° to +85°C for temperature compensated units TYPICAL FREQUENCY STABILITY OVER TEMPERATURE Page 3 of 5 EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ EME83 SERIES TCXO Low Power (nA Current Consumption) 32.768kHz PEAK CURRENT DURING MEASUREMENT PERIOD Example shown: 18EME833 Series (VDD = 1.8V, temperature measurement period = 30 seconds.) BLOCK DIAGRAM PACKAGE DIMENSIONS and SUGGEST SOLDER LAYOUT Page 4 of 5 EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ EME83 SERIES TCXO 32.768kHz Low Power (nA Current Consumption) PART NUMBER SCHEDULE Example: 18EME83 4-32768 18 EME83 4 - 32768 Orderable Part Output Numbers Frequency Supply Voltage 18 = 1.8 VDC 25 = 2.5 VDC 3 = 3.0 VDC 33 = 3.3 VDC 5 = 5.0 VDC Product Series EME83 Measurement Period 1 = Every minute 2 = Every 2 minutes 3 = Every 30 seconds 4 = Every 4 minutes (standard) Frequency in Hz RECOMMENDED SOLDER REFLOW PROFILE xxME83y-1/60 1/60Hz xxME83y-1/10 1/10Hz xxME83y-1 1Hz xxME83y-32 32Hz xxME83y-128 128Hz xxME83y-1024 1024Hz xxME83y-4096 4096Hz xxME83y-32768 32768Hz (per IPC/JEDEC J-STD-020D.1) Profile Feature Sn-Pb Eutectic Assembly Pb-free Assembly Temperature min. (Ts min.) 100°C 150°C Temperature max. (Ts max.) 150°C 200°C Time (ts) (ts min. to ts max.) 60 to 120 seconds 60 to 180 seconds Ramp-up Rate (T to T ) 3°C/second maximum 3°C/second maximum Liquidous Temperature 183°C 217°C Time (tL) maintained above TL 60 to 150 seconds 60 to 150 seconds Peak package body temperature (Tp) 235°C 260°C Time (Tp) within 5°C of the classification temperature Tc 10 to 30 seconds 20 to 40 seconds Ramp-down rate (Tp to TL) 6°C/second maximum 6°C/second maximum Time 25°C to peak temperature 6 minutes maximum 8 minutes maximum Preheat/Soak L P All temperature refer to topside of the package, measured on the package body surface. Page 5 of 5 EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk