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EM4350A5WS7E Datasheet(PDF) 3 Page - EM Microelectronic - MARIN SA |
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EM4350A5WS7E Datasheet(HTML) 3 Page - EM Microelectronic - MARIN SA |
3 / 14 page R EM4150 EM4350 Copyright © 2004, EM Microelectronic-Marin SA 3 www.emmicroelectronic.com Electrical Characteristics VDD = 2.5V, VSS = 0V, fcoil = 125 kHz Sine wave, Vcoil = 1Vpp, Top = 25°C unless otherwise stated Parameter Symbol Test Conditions Min Typ Max Units Supply voltage VDD 2.0 5.5 V Minimum EEPROM write voltage VDDee 2.6 V Power Check EEPROM write IPWcheck VDD = 3V 80 µA Supply current / read Ird Read Mode 3.0 5.0 µA Suppy current / write Iwr Write mode (VDD = 3V) 40 70 µA Modulator ON voltage drop VON V(COIL1–Vss) and V(COIL2-Vss) Icoil = 100µA V(COIL1–Vss) and V(COIL2-Vss) Icoil = 5mA 0.50 2.50 V V Resonance Capacitor Cr 166.5 170 173.5 pF Power On Reset level high Vprh Rising Supply 2.0 2.6 V Clock extractor input min. Vclkmin Minimum voltage for Clock Extraction 1.0 Vpp Clock extractor input max. Vclkmax Maximum voltage to detect modulation stop 50 mVpp EEPROM data endurance Ncy Erase all / Write all at VDD = 5V 100'000 cycles EEPROM retention Tret Top = 55°C after 100'000 cycles (Note 1) 10 years Note 1: Based on 1000 hours at 150°C Timing Characteristics VDD = 2.5V, VSS = 0V, fcoil = 125 kHz Sine wave, Vcoil = 1Vpp, Top = 25°C unless otherwise stated All timings are derived from the field frequency and are specified as a number of RF periods. Parameters Symbol Test conditions Value Units Option : 64 clocks per bit Opt64 Read Bit Period LIW/ACK/NACK pattern Duration Read 1 Word Duration Processing Pause Time Write Access Time Initialization Time EEPROM write time trdb tpatt trdw tpp twa tinit twee including LIW VDD = 3 V 64 320 3200 64 64 2112 3200 RF periods RF periods RF periods RF periods RF periods RF periods RF periods Option : 32 clocks per bit Opt32 Read Bit Period LIW/ACK/NACK pattern Duration Read 1 Word Duration Processing Pause Time Write Access Time Initialization Time EEPROM write time trdb tpatt trdw tpp twa tinit twee including LIW VDD = 3 V 32 160 1600 32 32 1056 2624 RF periods RF periods RF periods RF periods RF periods RF periods RF periods RF periods represent periods of the carrier frequency emitted by the transciever unit. For example, if 125 kHz is used : The Read bit period (Opt64) would be : 1/125'000*64 = 512 µs, and the time to read 1 word : 1/125'000*3200 = 25.6 ms. The Read bit period (Opt32) would be : 1/125'000*32 = 256 µs, and the time to read 1 word : 1/125'000*1600 = 12.8 ms. ATTENTION Due to amplitude modulation of the coil-signal, the clock-extractor may miss clocks or add spurious clocks close to the edges of the RF-envelope. This desynchronisation will not be larger than ±3 clocks per bit and must be taken into account when developing reader software. |
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