EM MICROELECTRONIC - MARIN SA EM7604-C7 Low Power Crystal Oscillator 32.768 kHz Description Features The EM7604-C7 is a very low power crystal oscillator, which consists of a 32.768 kHz tuning fork crystal and an advanced CMOS oscillator circuit assembled in the same ultra small, cost-effective SMD ceramic package C7. No external components are required. It combines excellent oscillator stability with a very low power consumption of typ. 300nA, guaranteed over a very wide supply voltage and temperature range. The output frequency is synchronized with signal on input Clock Enable CLKEN. The frequency output CLKOUT is enabled by connecting Clock Enable pin CLKEN to VDD. Connecting CLKEN to Vss, disables the frequency and the output CLKOUT is at Low State. Very low power consumption typ. 300nA Wide supply voltage range: 1.2V to 5.5V Operating temperature range: -10°C to +85°C. Very tight frequency tolerances: ± 20ppm Excellent oscillator stability: 0.2 ppm/V Synchronised output after Enable/Disable Low aging High shock and vibration resistant All-in-one-package solution Miniature ceramic package for SMD mounting, package height 1.0mm 100% lead free, RoHS - compliant Typical 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 Block Diagram VDD 4 REGULATION OSCILLATOR CLKEN 3 OUTPUT CONTROL 1 CLKOUT 2 VSS Pin Connection Top View Copyright 2014, EM Microelectronic-Marin SA 7604-C7-DS.doc, Version 2.1, 13-Oct-14 Pin Connection 1 CLKOUT 2 VSS 3 CLKEN Output Enable 4 VDD Positive Supply Voltage 1 Frequency Output Negative Supply Voltage www.emmicroelectronic.com 420005-A01, 2.0 EM7604-C7 Absolute Maximum Ratings Parameter Voltage at VDD to VSS Minimum voltage Maximum 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 VDD TA Min 1.2 -10 Max 5.5 +85 Unit V °C Min Typ Max Unit 1.2 3.0 300 250 750 5.5 550 500 1000 V nA nA nA 650 900 nA Electrical Characteristics VDD = 3.0 V; VSS = 0 V; TA = 25 °C; unless otherwise specified. Parameter Symbol Conditions Supply Supply voltage range Mean current consumption (Note 1) Oscillator + Quartz Output frequency Frequency tolerance (Note 2) Starting voltage Start-up time Voltage coefficient Aging first year @ 25°C Temperature coefficient VDD IDD VDD = 5.0V, CLKEN at VSS VDD = 3.0V, CLKEN at VSS VDD = 5.0V, CLKEN at VSS, TA = -10 to +85 °C VDD = 3.0V, CLKEN at VSS TA = -10 to +85 °C fO 32.768 -0.035 0.8 ±2 ±3 -0.031 kHz ppm V sec ppm/V ppm 2 ppm/°C 70 70 50 VSS + 0.4 100 100 60 V V ns ns % 0.2 x VDD VDD V V ±20 VST TST f/fO* VDD f/fO 1.5 V ≤ VDD ≤ 5.5 V VOH VOL tr tf IOH = -1.0 mA IOL = 1.0 mA CL = 15 pF, 10% to 90% VDD CL = 15 pF, 10% to 90% VDD Output driver CLKOUT Output voltage high Output voltage low Output rise time Output fall time Duty cycle Within 3 seconds 1.2 0.4 ± 0.2 -0.039 VDD - 0.4 40 Output Enable CLKEN Input voltage low Input voltage high VIL VIH VSS 0.8 x VDD Note 1: The current consumption when the output clock is enabled (CLKEN pin at VDD) is a function of the load capacitance on the CLKOUT pin, the output frequency fOUT = 32768Hz and the supply voltage VDD. The additional consumption for a given load can be calculated from: ΔI DD = CLOAD x VDD x fOUT Note 2: Tighter tolerance on request. Environmental Characteristics Parameter Shock resistance Vibration resistance Symbol f/fO f/fO Copyright 2014, EM Microelectronic-Marin SA 7604-C7-DS.doc, Version 2.1, 13-Oct-14 Conditions 5000 g, 0.3 ms, ½ sine 20 g / 10 – 2000Hz 2 Maximum Deviation ±5 ±5 Unit ppm ppm www.emmicroelectronic.com 420005-A01, 2.0 EM7604-C7 Timing Waveforms 32768Hz CLKEN CLKOUT tCKH tCKL 32768Hz CLKEN CLKOUT tCKH tCKL = 0 VIH CLKEN VIL CLKOUT tCKL tCKH Application Note Using EM7604 with disturbed Supply Voltage on VDD If the power supply of the EM7604 (VDD) is disturbed, the circuit must be protected against VDD fast transients. As the oscillator has a very low power consumption, the clock generation is sensitive to fast supply changes and clock pulses could be lost. If in the application, positive or negative VDD fast slopes may occur, an RC low pass filter in the VDD supply connection of the EM7604 must be used, according to the following figure: Typical Application Schematic R + C VDD_EXT VDD XI Crystal VDD EM7604-C7 µC XO (Application) CLKOUT CLKEN GPIO VSS VSS VSS = 0V The RC filter is composed of a capacitor (C) and resistor (R) implemented per example by a 1k resistor and a 10µF capacitor. The resistor and the capacitor can be adapted if needed. Copyright 2014, EM Microelectronic-Marin SA 7604-C7-DS.doc, Version 2.1, 13-Oct-14 3 www.emmicroelectronic.com 420005-A01, 2.0 EM7604-C7 Frequency Temperature Characteristics Package Information: The termination is with Au flashed pads for SMD mounting. Ordering Information Please make sure to quote the exact Part Number when ordering. Part Number EM7604V20SCP4B+ Version Frequency Tolerance Package Type Marking V20 ± 20 ppm SCP – 4 pin OV-7604-C7 Delivery Form 12mm tape, 7” reel with 3’000 packages EM Microelectronic-Marin SA (“EM”) makes no warranties for the use of EM products, other than those expressly contained in EM's applicable General Terms of Sale, located at http://www.emmicroelectronic.com. EM assumes no responsibility for any errors which may have crept into 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 rights of EM are granted in connection with the sale of EM products, neither expressly nor implicitly. In respect of the intended use of EM products by customer, customer is solely responsible for observing existing patents and other intellectual property rights of third parties and for obtaining, as the case may be, the necessary licenses. Important note: The use of EM products as components in medical devices and/or medical applications, including but not limited to, safety and life supporting systems, where malfunction of such EM products might result in damage to and/or injury or death of persons is expressly prohibited, as EM products are neither destined nor qualified for use as components in such medical devices and/or medical applications. The prohibited use of EM products in such medical devices and/or medical applications is exclusively at the risk of the customer Copyright 2014, EM Microelectronic-Marin SA 7604-C7-DS.doc, Version 2.1, 13-Oct-14 4 www.emmicroelectronic.com 420005-A01, 2.0