ltc4558eud-trpbf Linear Technology Corporation, ltc4558eud-trpbf Datasheet
ltc4558eud-trpbf
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ltc4558eud-trpbf Summary of contents
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... Board area is minimized by the low profi le 3mm × 3mm Cellular Phones × 0.75mm leadless QFN package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents, including 6356140. 0.1μF ...
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... UD PACKAGE 20-LEAD (3mm × 3mm) PLASTIC QFN T = 125°C, θ = 68°C/W, θ = 4.2°C/W JMAX JA JC EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB UD PART MARKING LTC4558EUD LCSH http://www.linear.com/leadfree/ = 1.8V 1μF, unless otherwise specifi ed MIN TYP MAX ● ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER CONDITIONS CLKA,B Low Level Output Voltage (V ) Sink Current = – 200μA (Note 2) OL High Level Output Voltage (V ) Source Current = 200μA (Note 2) OH ...
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LTC4558 TYPICAL PERFORMANCE CHARACTERISTICS No Load Supply Current vs V BATT 100 T = 25° 0μA CCA CCB 90 85 DROPOUT CCX 1.8V CCX 60 ...
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TYPICAL PERFORMANCE CHARACTERISTICS T A Data – I/O Channel 40pF L I/0X 1V/DIV DATA 1V/DIV 4557 G06 200ns/DIV Deactivation Sequence 1μF VCCX RSTX 5V/DIV CLKX 5V/DIV I/OX 5V/DIV V CCX 2V/DIV 4557 G07 20μs/DIV LTC4558 = ...
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LTC4558 PIN FUNCTIONS DV (Pin 2): Power. Reference voltage for the control CC logic. V (Pin 3): Power. Supply voltage for the analog sec- BATT tions of the LTC4558 (Pins 4, 1): Card Socket. The V CCA CCB ...
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BLOCK DIAGRAM V 4 CCA I/OA 7 RSTA 6 CLKA 5 CLKRUNA 14 DATA 8 RSTIN 9 CLKIN BATT 2 3 LDOA LDOB DV CC CONTROL GND CSEL VSELA ENABLEA VSELB LTC4558 ...
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LTC4558 OPERATION The LTC4558 features two independent SIM/Smart Card channels. Only one of these channels may be open for communication at a time however both channels can be enabled and made ready for communication using the ENABLEA and ENABLEB pins. ...
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OPERATION Activation/Deactivation Activation and deactivation sequencing is handled by built- in circuitry. Each channel may be activated or deactivated independently of the other. The activation sequence for each channel is initiated by bringing the ENABLEA,B pin HIGH. The activation sequence ...
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LTC4558 APPLICATIONS INFORMATION 10kV ESD Protection All Smart Card pins (CLKA,B, RSTA,B, I/OA,B, V GND) can withstand over 10kV of human body model ESD in-situ. In order to ensure proper ESD protection, careful board layout is required. The GND pin ...
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... ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. UD Package 20-Lead Plastic QFN (3mm × ...
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... SIM Cards LTC4556 Smart Card Interface with Serial Control LTC4557 Dual SIM/Smart Card Power Supply and Level Translator for 1.8V/3V Cards ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...