• - 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

This dual bidirectional I²C buffer is operational at 2.7 V to 5.5 V.

The PCA9517 is a BiCMOS integrated circuit intended for I²C bus and SMBus systems. It can also provide bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 0.9 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I²C and similar bus systems to be extended, without degradation of performance even during level shifting.

The PCA9517 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I²C bus, thus allowing two buses of 400-pF bus capacitance to be connected in an I²C application. This device can also be used to isolate two halves of a bus for voltage and capacitance.

特性

• Two-Channel Bidirectional Buffer
• I²C Bus and SMBus Compatible
• Operating Supply Voltage Range of 0.9 V to 5.5 V on A Side
• Operating Supply Voltage Range of 2.7 V to 5.5 V on B Side
• Voltage-Level Translation From 0.9 V to 5.5 V and 2.7 V to 5.5 V
• Footprint and Function Replacement for PCA9515A
• Active-High Repeater-Enable Input
• Open-Drain I²C I/O
• 5.5-V Tolerant I²C and Enable Input Support Mixed-Mode Signal Operation
• Lockup-Free Operation
• Accommodates Standard Mode and Fast Mode I²C Devices and Multiple Masters
• Supports Arbitration and Clock Stretching Across Repeater
• Powered-Off High-Impedance I²C Pins
• 400-kHz Fast I²C Bus
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)