MultiKey iButton

iButton DESCRIPTION The DS1991 MultiKey iButton is a rugged read/write data carrier that acts as three separate electronic keys, offering 1,152 bits of secure, nonvolatile memory. Each key is 384 bits long with distinct 64-bit password and public ID fields (Figure 1). The password field must be m

iButton多密钥

iButton®多密钥(DS1991)是坚固耐用的读/写操作数据载体，它有三个独立的电子密钥，提供1,152位安全、非易失存储器。每个密钥分区包括384位，具有独立的64位密码和公共识别区(完整数据资料中的图1)；密码区必须匹配才能访问安全存储器。数据按照1-Wire®协议传输，只需单条数据线和地回路。512位的暂存器能够保证安全存储器的数据完整性。数据首先写到能读回的暂存器；数据被校验确认后，发出复制暂存器命令，以便将数据传送到存储器。这个过程确保了在改变存储器内容时的数据完整性。每片DS1991内部都有在工厂光刻的48位序列码，为唯一的身份验证提供了保证，也确保了可绝对跟踪功能；DS199 \n• 安全可靠的1,152位的读/写、非易失存储器 \n• 若64位密码不匹配，则安全存储器不会被译解 \n• 存储器被分成3个分区，每分区包含384位 \n• 每个分区都有64位的密码和识别码 \n• 512位的暂存器确保了数据传送的完整性 \n• 工作温度范围：-40°C至+70°C \n• 数据可保持10年以上;

MultiKey iButton

iButton DESCRIPTION The DS1991 MultiKey iButton is a rugged read/write data carrier that acts as three separate electronic keys, offering 1,152 bits of secure, nonvolatile memory. Each key is 384 bits long with distinct 64-bit password and public ID fields (Figure 1). The password field must be m

Class D/1-Bit Audio Power Output Stage

GENERAL DESCRIPTION The AD1991 is a 2-channel BTL or 4-channel single-ended class D audio power output stage. The part is configured during reset to be in either 2-channel mode or 4-channel mode. FEATURES Class D/1-Bit Audio Power Output Stage 5 V Analog and Digital Supply Voltages

FM Pager/FM Multiplex Tuner

Description The CXA1991N is a tuner IC designed for use in FM pagers and FM multiplex broadcasting. A receiver system can be configured by using the digital data output, in combination with a decoder. It has a battery save function and ultra-low power consumption. Features • Ultra-low power c

FM Pager/FM Multiplex Tuner

Description The CXA1991N is a tuner IC designed for use in FM pagers and FM multiplex broadcasting. A receiver system can be configured by using the digital data output, in combination with a decoder. It has a battery save function and ultra-low power consumption. Features • Ultra-low power c

Three-Phase Brushless Motor Driver for Portable VCR Capstan Motors

Overview The LB1991V is a 3-phase brushless motor driver IC tha is optimal for driving the capstan motor in portable VCR products. Functions • 3-phase full-wave voltage drive technique (120° voltage-linear technique) • Torque ripple correction circuit (overlap correction) • Speed control tech