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参数

Applications UART, JTAG Bits (#) 2 Output voltage (Min) (V) 0.65 Output voltage (Max) (V) 3.6 IOH (Max) (mA) -12 IOL (Max) (mA) 12 Rating Catalog open-in-new 查找其它 方向控制型电压转换器

封装|引脚|尺寸

VSSOP (DCU) 8 6 mm² 2 x 3.1 X2SON (DTM) 8 1 mm² 0.8 x 1.35 open-in-new 查找其它 方向控制型电压转换器

特性

  • Fully configurable dual-rail design allows each port to operate with a power supply range from 0.65 V to 3.6 V
  • Operating temperature from –40°C to +125°C
  • Glitch-free power supply sequencing
  • Up to 380 Mbps support when translating from 1.8 V to 3.3 V
  • VCC isolation feature
    • If either VCC input is below 100 mV, all I/O outputs are disabled and become high impedance
  • Ioff supports partial-power-down mode operation
  • Compatible with AVC family level shifters
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 8000-V human-body model (HBM)
    • 1000-V charged-device model (CDM)

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open-in-new 查找其它 方向控制型电压转换器

描述

The SN74AXCH2T45 is a two-bit non-inverting bus transceiver that uses two individually configurable power-supply rails. The device is operational with both VCCA and VCCB supplies as low as 0.65 V. The A port is designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. The B port is designed to track VCCB, which also accepts any supply voltage from 0.65 V to 3.6 V. Additionally the SN74AXCH2T45 is compatible with a single-supply system.

The SN74AXCH2T45 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control input (DIR). The SN74AXCH2T45 device is designed so the control pin (DIR) is referenced to VCCA.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. If a supply is present for VCCA or VCCB, the bus-hold circuitry always remains active on the A or B inputs respectively, independent of the state of the direction control pin.

This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down.

The VCC isolation feature ensures that if either VCCA or VCCB is less than 100 mV, both I/O ports enter a high-impedance state by disabling their outputs.

Glitch-free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.

open-in-new 查找其它 方向控制型电压转换器
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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 SN74AXCH2T45 2-Bit Bus Transceiver with Configurable Level-Shifting and Bus-Hold Inputs 数据表 2016年 11月 16日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
10
说明
灵活的 EVM 设计用于支持具有 5 至 8 引脚数且采用 DCK、DCT、DCU、DRL 或 DBV 封装的任何器件。
特性
  • 电路板设计允许进行多功能性评估
  • 支持多种逻辑器件
评估板 下载
document-generic 用户指南
20
说明

该通用 EVM 旨在支持 1、2、4 和 8 通道 LVC 和 AVC 方向控制转换器件。它还以相同数量的通道支持总线保持和汽车 Q1 器件。AVC 是低电压转换器件,具有 12mA 的较低驱动强度。LVC 是 1.65 至 5.5V 的较高电压转换器件,具有 32mA 的较高驱动强度。

特性
  • 可用于高速操作的 SMB 连接器
  • 每个插头引脚上均配备接地端口,可保持信号完整性
  • DIR 和 OE 具有 10KΩ 上拉/下拉电阻器选项
  • 可支持多达 20 个不同器件
评估板 下载
AXC2T-SMALLPKGEVM
AXC2T-SMALLPKGEVM
document-generic 用户指南
20
说明
This EVM is designed to support DTM and RSW packages for the AXC and LVC family of DIR controlled bidirectional devices. The AXC and AVC devices belong to the low voltage direction controlled translation family with operating voltage from 0.65V to 3.6V (AXC) and 1.2 to 3.6 (AVC) with 12mA of drive (...)
特性
  • Pre-populated with the SN74AXC2T45DTM package
  • Demonstrates the small package technology of TI 
  • Ground port for each header pin supports high speed measurement
  • DIR pin; have the option of 10K ohm resistor pullup or pulldown

CAD/CAE 符号

封装 引脚 下载
VSSOP (DCU) 8 了解详情
X2SON (DTM) 8 了解详情

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