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| R EM MICROELECTRONIC - MARIN SA EM7604 Low Power Crystal Oscillator 32.768 kHz Description The EM7604 is an advanced low power CMOS circuit intended to be used together with a 32.768 kHz tuning fork crystal as a low frequency clock oscillator. Except the crystal, no other external components are required. In order to achieve a high frequency accuracy, the matched crystals should have a 20ppm tolerance or tighter. Very low power consumption, as low as 250nA, is guaranteed over a very wide supply voltage and temperature ranges. Offered in a small SOT23-6 package, the EM7604 is a completely lead free product. Features Very low power consumption: typ. 250nA On chip integrated oscillation capacitor: CL=8pF Matched low cost SMD quartz available from Micro Crystal Compatibility with crystals having high series resistance Very tight frequency tolerance Excellent oscillator stability: 0.2ppm/V Wide supply voltage range: 1.2V to 5.5V Operating temperature range: -40C to +125C Small SOT23-6 package 100% lead free, RoHS - compliant Applications General purpose clock generator for digital systems Clock drivers for Real Time Clocks Timekeeping in network servers and computers Electricity, gas and water metering Portable field communication Mobile phone Solution for problems with embedded quartz oscillators Block Diagram VDD REGULATION OSCILLATOR OE OUTPUT CONTROL OUT Pin Assignment VSS Pin 1 2 3 4 5 6 Connection OSCOUT VSS OSCIN OE VDD OUT Assignment Oscillator Output Negative Supply Voltage Oscillator Input Output Enable Positive Supply Voltage Frequency Output SOT23 OSCOUT VSS OSCIN 1 2 3 6 OUT VDD OE EM7604 5 4 Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.A 1 www.emmicroelectronic.com R EM7604 Absolute Maximum Ratings Parameter Voltage at VDD to VSS Minimun voltage Maximun voltage Storage Temperature Range Maximum soldering Symbol Conditions VDD -0.3V to +6V VMIN VSS - 0.3V VMAX VDD + 0.3V TSTG -55C to +150C TSmax 260C x 20s Handling Procedures This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level. Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Operating Conditions Parameter Supply voltage Operating Temperature Symbol Min VDD 1.2 TA -40 Max 5.5 +125 Unit V C Electrical Characteristics Unless otherwise specified: VDD= 3.0V, VSS= 0V, TA=25C and RS= 60k Parameter Symbol Conditions Supply voltage range VDD Current consumption IDD1 VDD= 5.0V, OE at VSS (Note1) VDD= 3.0V, OE at VSS VDD= 2.0V, OE at VSS VDD= 5.0V, OE at VSS Top=-40 to +85C VDD= 3.0V, OE at VSS Top=-40 to +85C VDD= 2.0V, OE at VSS Top=-40 to +85C Oscillator Min 1.2 Typ 3.0 300 250 250 750 650 650 Max 5.5 550 500 500 1000 900 900 Unit V nA nA nA nA nA nA Input Capacitance Output Capacitance Start Up Voltage Start Up Time Frequency Stability against Supply Voltage Variations Input Input Voltage Output Duty Cycle Output Voltage Output Rise and Fall Time CIN COUT VSTARTUP tSTARTUP f/f *V VIL VIH VOH VOL tRF IOH = -1.0 mA, VDD= 5.0V IOL = 1.0 mA, VDD= 5.0V CL = 15pF 10% - 90% tSTART < 3s 1.5 VDD 5.5V VSS 0.8 x VDD 40 VDD-0.4 1.2 16 16 0.4 0.2 0.8 2 0.2 x VDD VDD 50 VDD-0.1 0.14 70 60 0.4 100 pF pF s ppm/V V V % V V ns Note1: The current consumption when the output clock is enabled (OE pin at VDD) is a function of the load capacitance on the OUT pin, the output frequency fOUT = 32768Hz and the supply voltage VDD. The additional consumption for a given load can be calculated from: IDD = CLOAD x VDD x fO Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.A 2 www.emmicroelectronic.com R EM7604 Timing Waveforms 32768Hz OE OUT tCKH tCKL 32768Hz OE OUT tCKH tCKL OE VIH VIL OUT tCKH tCKL Frequency Temperature Characteristics with Standard 32.768 kHz Crystal Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.A 3 www.emmicroelectronic.com R EM7604 Package Information: Ordering Information Part Number Package Type Top Marking Delivery Form EM7604V1SP6B+ SOT23 OVXY Tape & Reel Contact EM Microelectronic for availability in chip form or in other packages. XY characters of the Top Marking are used for the lot traceability. EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for use as components in life support devices or systems. Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.A 4 www.emmicroelectronic.com |
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