TCA9406 2 位双向 1MHz I2C 总线和 SMBus 电压电平转换器 | 德州仪器 TI.com.cn

TCA9406 (正在供货)

2 位双向 1MHz I2C 总线和 SMBus 电压电平转换器

2 位双向 1MHz I2C 总线和 SMBus 电压电平转换器 - TCA9406
 

描述

The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A-side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and 5-V supply rails.

The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption.

Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps.

The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges.

特性

  • 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
  • Provides Bidirectional Voltage Translation With No Direction Pin
  • High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC = 0 V
  • Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
  • 1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA  ≤ VCCB)
  • VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
  • No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
  • Low Ioff of 2 µA When Either VCCA or VCCB = 0 V
  • OE Input Can Be Tied Directly to VCCA Or Controlled By GPIO
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • A Port
      • 2500-V Human-Body Model (A114-B)
      • 250-V Machine Model (A115-A)
      • 1500-V Charged-Device Model (C101)
    • B Port
      • 8-kV Human-Body Model (A114-B)
      • 250-V Machine Model (A115-A)
      • 1500-V Charged-Device Model (C101)

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参数 与其它产品相比 I2C 电平转换器、缓冲器和集线器

 
Number of Outputs
fSCLK (Max) (MHz)
VCC (Max) (V)
VCC (Min) (V)
Frequency (Max) (kHz)
Channel Width
Master Side I2C Bus Capacitance Supported (pF)
Slave Side I2C Bus Capacitance Supported (pF)
Features
Operating Temperature Range (C)
Package Group
Pin/Package
TCA9406 PCA9306 PCA9306-Q1
2     2     2    
1     0.4     0.4    
5.5     5.5     5.5    
1.65     1.2     1.2    
1000     400     400    
2     2     2    
400     400     400    
400     400     400    
5V Tolerant I/O
Enable Pin
Open-Drain I/O Type    
5V Tolerant I/O
Enable Pin
Low Voltage
Open-Drain I/O Type    
5V Tolerant I/O
Enable Pin
Low Voltage
Open-Drain I/O Type    
-40 to 85     -40 to 85     -40 to 105
-40 to 85    
DSBGA
SM8
VSSOP    
DSBGA
SM8
VSSOP
X2SON    
VSSOP    
8DSBGA
8SM8
8VSSOP    
8DSBGA
8SM8
8VSSOP
8X2SON    
8VSSOP