MEDER electronic MMS Series Micro Machined Sensors DESCRIPTION The MMS is a ultra-small magnetically actuated reed sensor (SPST) that requires no power. It is manufactured by using semiconductor wafer technology. Its biggest advantages are the small dimensions with 4.8 mm x 2.05 mm (0.189’’x 0.081’’). FEATURES APPLICATIONS • Medical pacemakers and insulin pumps • Telecommunications • CMOS gates and other low power signals switching • SMT reed sensors (SPST) in miniature size • requires no power • ultra-small dimensions • designed for switching low power devices (max. 3 VDC) • 109 Ohm insulation resistance across the contacts • magnetic sensitivity ranges from 1.8 to 4.0 milliTesla • preferably packaged in tape & reel according to IEC 286/part 3, waffle package possible • electrostatic sensitive device!! DIMENSIONS All dimensions in mm [inches] unspecified tolerances +/- 0.1 mm Lead design 1 Lead design 2 www.meder.com 297 MEDER electronic MMS Series Micro Machined Sensors PAD LAYOUT Lead design 1+2 PACKAGING ORDER INFORMATION Part Number Example MMS - B - 1 B is the magnetic sensitivity 1 defines the lead design www.meder.com 298 Series Sensitivity Class Lead Design MMS B 1,2 MEDER electronic MMS Series Micro Machined Sensors CONTACT DATA All Data at 20° C Contact Form --> Contact Ratings Conditions Form A / Min. Typ. Dry Max. Unit Switching Power Any DC combination of V & A not to exceed their individual max.‘s 0.3 mW Switching Voltage DC or peak AC 3.0 V Switching Current DC or peak AC 100 μA Carry Current DC or peak AC 100 μA Static Contact Resistance Measured w/ 0.5 V & 50 μA 1000 Ω Insulation Resistance across Contacts 25 Volt applied Breakdown Voltage across Contacts 50 109 Ω 50 VDC Operate Time incl. Bounce Measured w/ 40 % overdrive 0.1 0.2 ms Release Time Measured w/ no coil suppression 0.05 0.1 ms Capacitance at 10 kHz across contact 0.2 0.5 pF Life Expectancies Switching Voltage 1.5 V & 15 μA 107 Cycles Pull-In Ramped in 0.1 mT/ms steps 1.8 4.0 mT Drop-Out Ramped in 0.1 mT/ms steps 0.5 3.2 mT Magnetic Characteristics Environmental Data Shock Resistance Any direction 5000 g Vibration Resistance From 10 - 2000 Hz 30 g Ambient Temperature 10°C/ minute max. allowable -20 100 o C Stock Temperature 10°C/ minute max. allowable -55 150 o C Soldering Temperature 3.5 sec. at 260 o C Cleaning fully sealed Packaging Tape & Reel Marking On Tape & Reel Packaging 17.78 mm Reel (7 inch), 12 mm width, 4 mm ptich A: Supplier Part Number B: Supplier Lot Number / Date Code C: Quantity www.meder.com 299 MEDER electronic MMS Series Micro Machined Sensors ATTENTION These devices are especially designed for low voltage and low power switching! The following points must be respected when the device is connected in a circuit: ATTENTION OBSERVE PRECAUTIONS FOR HANDLING ELECTRONSTATIC SENSITIVE DEVICES • Voltage spikes (electrostatic or otherwise) across the terminals in the open mode are limited to 10 dv/dt • Switched voltages and current are limited to the maximum ratings • The parallel capacitance added across the switch is less than 100 pF • Minimize stray capacitance to less than 100 pF in any lead circuit • The mounting and test equipment are properly grounded, as they may induce voltage spikes across the terminals • All handling is performed on a conductive mat, and the operator is also grounded through a wrist contact bracelet • Permanent sticking or damage of the contacts may result whenever any of the above warnings is not respected. www.meder.com 300