采用串行控制的双智能卡接口

LTC®1955 提供了用于两张智能卡、两张 S.A.M (安全验证模块) 卡或 S.A.M 卡与智能卡之组合的所有必需的监控和电源控制功能。它提供了一个面向电池供电型应用的充电泵以及全部必要的电平移位电路。 卡的电压可被独立地设定为 1.8V、3V 或 5V。两个卡接口均包括一个卡检测通道和自动防反跳电路。为了降低布线成本，LTC1955 通过一个简单的四线式串行接口连接至一个微控制器。可以采用菊链的方式把多个器件连接起来，这样，至卡座板的导线数量就与插座的数量无关。状态数据通过相同的接口送回。 大量的安全功能可确保在发生电源故障或智能卡电气故障时执行正确的去激活排序操作。智能卡引脚 • 与 ISO7816-3 和 EMV 电气规格相兼容 \n\n• 用于双智能卡的电源管理和控制 \n\n• 控制 / 状态串行端口可以采取菊链连接方式以适应多卡应用的要求 \n\n• 在发生电气故障时自动停机 \n\n• 降压 / 升压充电泵可产生 5V、3V 或 1.8V 输出 (A、B 和 C 类智能卡)\n\n• 用于两张智能卡的独立 5V / 3V / 1.8V 电平控制\n\n• 自动电平变换\n\n• 监控功能可防止发生智能卡故障\n\n• 低工作电流：250μA (典型值)\n\n• 超低停机电流\n\n• 在智能卡引脚上提供了 >10kV ESD 防护能力\n\n• 小外形 ;

Dual Smart Card Interface with Serial Control

文件：259.64 Kbytes Page：20 Pages

Dual Smart Card Interface with Serial Control

文件：372.06 Kbytes Page：22 Pages

Dual Smart Card Interface with Serial Control

文件：259.64 Kbytes Page：20 Pages

封装/外壳：32-WFQFN 裸露焊盘 包装：托盘 描述：IC INTERFACE SPECIALIZED 32QFN 集成电路（IC） 专用

封装/外壳：32-WFQFN 裸露焊盘 包装：卷带（TR） 描述：IC INTERFACE SPECIALIZED 32QFN 集成电路（IC） 专用

High Performance Multibit DAC with SACD Playback

PRODUCT OVERVIEW The AD1955 is a complete high performance single-chip stereo digital audio playback system. It is comprised of a multibit sigma-delta modulator, high performance digital interpolation filters, and continuoustime differential current output DAC section. Other features include an

High Performance Multibit DAC with SACD Playback

PRODUCT OVERVIEW The AD1955 is a complete high performance single-chip stereo digital audio playback system. It is comprised of a multibit sigma-delta modulator, high performance digital interpolation filters, and continuoustime differential current output DAC section. Other features include an

Three-Phase Brushless Motor Driver

Features • Current linear drive • FG and PG free • Single-voltage power supply • Built-in AGC circuit • Built-in thermal shutdown circuit Functions • The LB1955 is a 3-phase brushless motor driver IC that is optimal for applications such as driving the drum motor in VCRs.

Integrated Circuit Positive 3 Terminal Voltage Regulator, Low Dropout Voltage, 15V, 1A

Description: The NTE1955 positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground c