• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The ISO7420, ISO7420M and ISO7421 provide galvanic isolation up to 2.5 kVrms for 1 minute per UL. These digital isolators have two isolated channels. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. The suffix M indicates wide temperature range (–40°C to 125°C).

The devices have TTL input thresholds and require two supply voltages, 3.3V or 5V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3V supply.

特性

• Highest Signaling Rate: 1 Mbps
• Low Power Consumption, Typical I_CC per Channel (3.3V operation):
  • ISO7420: 1.1 mA, ISO7421: 1.5 mA
• Low Propagation Delay – 9 ns Typ. and Low Skew – 300 ps Typ.
• Wide T_A Range Specified: –40°C to 125°C
• UL 1577 Approved with 2.5 kVrms Rating
• 4-kVpeak Maximum Isolation, IEC/VDE and CSA Approvals, IEC 60950-1,
  IEC 61010-1 End Equipment Standards Approvals. All Approvals Pending.
• 50 kV/µs Transient Immunity, Typical
• Over 25-Year Isolation Integrity at Rated Voltage
• Operates From 3.3V and 5V Supply and Logic Levels
• APPLICATIONS
  • Optocoupler Replacement in:
    • Industrial Fieldbus
      • Profibus
      • Modbus
      • DeviceNet™ Data Buses
    • Servo Control Interface
    • Motor Control
    • Power Supplies
    • Battery Packs