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: -40°C to +125°C Small SOT23-6 package 100% lead free, RoHS – compliant Block Diagram 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 VDD REGULATION OSCILLATOR OUTPUT CONTROL OE OUT Pin Assignment VSS Pin Connection Assignment 1 OSCOUT Oscillator Output 2 VSS Negative Supply Voltage 3 OSCIN Oscillator Input 4 OE Output Enable 5 VDD Positive Supply Voltage 6 OUT Frequency Output Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.A SOT23 1 OSCOUT 1 VSS 2 OSCIN 3 EM7604 6 OUT 5 VDD 4 OE www.emmicroelectronic.com R EM7604 Absolute Maximum Ratings Parameter Voltage at VDD to VSS Minimun voltage Maximun voltage Storage Temperature Range Maximum soldering 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. Symbol Conditions VDD -0.3V to +6V VMIN VSS – 0.3V VMAX VDD + 0.3V TSTG -55°C to +150°C TSmax 260°C x 20s 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=25°C and RS= 60kΩ 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 +85°C VDD= 3.0V, OE at VSS Top=-40 to +85°C VDD= 2.0V, OE at VSS Top=-40 to +85°C Oscillator 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 Min 1.2 CIN COUT VSTARTUP tSTARTUP Δf/f *ΔV Max 5.5 550 500 500 1000 Unit V nA nA nA nA 650 900 nA 650 900 nA 16 16 tSTART < 3s pF pF 1.2 0.4 0.2 1.5 ≤ VDD ≤ 5.5V VIL VIH VOH VOL tRF Typ 3.0 300 250 250 750 VSS 0.8 x VDD IOH = -1.0 mA, VDD= 5.0V IOL = 1.0 mA, VDD= 5.0V CL = 15pF 10% - 90% 40 VDD-0.4 0.8 2 s ppm/V 0.2 x VDD VDD V V 60 50 VDD-0.1 0.14 0.4 % V V 70 100 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: ΔIDD = CLOAD x VDD x fO Copyright © 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 VIH OE VIL OUT tCKL tCKH Frequency Temperature Characteristics with Standard 32.768 kHz Crystal Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.A 3 www.emmicroelectronic.com R EM7604 Package Information: Ordering Information Part Number EM7604V1SP6B+ Package Type SOT23 Top Marking Delivery Form 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 © 2006, EM Microelectronic-Marin SA 03/06 – rev.A 4 www.emmicroelectronic.com