LTC4557是Linear公司的一款SIM 接口产品，LTC4557是Dual SIM/Smart Card Power Supply and Interface，本站介绍了LTC4557的封装应用图解、特点和优点、功能等，并给出了与LTC4557相关的凌力尔特元器件型号供参考。
LTC4557 - Dual SIM/Smart Card Power Supply and Interface
LTC4557 - Dual SIM/Smart Card Power Supply and Interface - Linear Technology（凌力尔特）
The LTC4557 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 100μA and a shutdown current of less than 1μA. Board area is minimized by the low profile 3mm x 3mm x 0.75mm leadless QFN package.
*U.S. Patent No. 6,356,140
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
|---|---|---|---|---|
| LTC4557EUD | 3x3 QFN-16 | E | $2.14 | $1.50 |
| LTC4557EUD#PBF | 3x3 QFN-16 | E | $2.14 | $1.50 |
| LTC4557EUD#TR | 3x3 QFN-16 | E | $1.56 | |
| LTC4557EUD#TRPBF | 3x3 QFN-16 | E | $1.56 |
