Datenblatt-Suchmaschine für elektronische Bauteile |
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LTC4557 Datenblatt(PDF) 1 Page - Linear Technology |
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LTC4557 Datenblatt(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC4557 4557f s GSM and 3G Cellular Phones s Wireless P.O.S. Terminals s Multiple SAM Card Interface s Power Management and Signal Level Translators for Two SIM Cards or Smart Cards s Independent 1.8V/3V VCC Control for Both Cards s Automatic Level Translation s ISO7816, ETSI and EMV Compatible s Dynamic Pull-Ups Deliver Fast Signal Rise Times* s Built-In Fault Protection Circuitry s Automatic Activation/Deactivation Sequencing Circuitry s Low Operating/Shutdown Current s >10kV ESD on SIM Card Pins s Compatible with EMV Fault Tolerance Requirements s Available in 16-Lead (3mm × 3mm) QFN Package Dual SIM/Smart Card Power Supply and Interface Deactivation Sequence , LTC and LT are registered trademarks of Linear Technology Corporation. The LTC ®4557 provides power conversion and signal level translation needed for 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The part meets all requirements for 1.8V and 3V SIMs. The part contains LDO regulators to power 1.8V or 3V SIM cards from a 2.7V to 5.5V input. The output voltages can be set using the two voltage selection pins and up to 50mA of load current can be supplied. Internal level translators allow controllers operating with supplies as low as 1.2V to interface with 1.8V or 3V smart cards. Battery life is maximized by a low operating current of less than 100 µA and a shutdown current of less than 1 µA. Board area is minimized by the low profile 3mm × 3mm × 0.75mm leadless QFN package. DVCC VBATT VBATT 3V TO 6V DVCC 1.2V TO 4.4V LTC4557 µCONTROLLER VCCA I/OA DVCC RSTA CLKA C1 C1 C5 C5 C3 C2 C7 C7 C2 C3 GND VCCB CLKB RSTB I/OB CLKIN 0.1 µF 1 µF 1 µF RSTIN DATA ENABLE M0 M1 0.1 µF 4557 TA01 1.8V/3V SIM CARD 1.8V/3V SMART CARD VCC I/O RST CLK GND GND VCC CLK RST I/O *U.S. Patent No. 6,356,140 RSTX 5V/DIV CLKX 5V/DIV I/OX 5V/DIV VCCX 2V/DIV 10 µs/DIV CVCCX = 1µF 4557 G07 FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO |
Ähnliche Teilenummer - LTC4557 |
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Ähnliche Beschreibung - LTC4557 |
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