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

TCA9406是TI德州仪器公司的一款I2C特殊功能产品，TCA9406是2 位双向 1MHz I2C 总线和 SMBus 电压电平转换器，本站介绍了TCA9406的封装应用图解、特点和优点、功能等，并给出了与TCA9406相关的TI元器件型号供参考。

TCA9406 - 2 位双向 1MHz I2C 总线和 SMBus 电压电平转换器 - I2C特殊功能 - I2C - 德州仪器

产品特性

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)

产品应用

I2C/SMBus
UART
GPIO

产品说明

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 2Mbps; 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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TCA9406	SM8 (8)	2.95 mm × 2.80 mm
	US8 (8)	2.30 mm × 2.00 mm
	DSBGA (8)	1.90 mm × 0.90 mm

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