This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.2 V to 3.6 V. The SN74AVCH4T245 is optimized to operate with V_CCA/V_CCB set at 1.4 V to 3.6 V. It is operational with V_CCA/V_CCB as low as 1.2 V. This allows for universal low voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.

The SN74AVCH4T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess I_CC and I_CCZ.

The SN74AVCH4T245 device control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by V_CCA.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The V_CC isolation feature ensures that if either V_CC input is at GND, then both ports are in the high-impedance state. The bus-hold circuitry on the powered-up side always stays active.

Active bus-hold circuitry holds unused or undriven data inputs at a valid logic state. Use of pull-up or pull-down resistors with the bus-hold circuitry is not recommended. The bus-hold circuitry on the powered-up side always stays active.

To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• Control Inputs VIH/VIL Levels are Referenced to VCCA Voltage
• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2V to 3.6V Power- Supply Range
• I/Os Are 4.6V Tolerant
• Ioff Supports Partial Power-Down-Mode Operation
• Bus Hold on Data Inputs Eliminates the Need for External pull-up/pull-down Resistors
• Max Data Rates
  • 380 Mbps (1.8 V to 3.3 V Translation)
  • 200 Mbps (<1.8 V to 3.3 V Translation)
  • 200 Mbps (Translate to 2.5 V or 1.8 V)
  • 150 Mbps (Translate to 1.5 V)
  • 100 Mbps (Translate to 1.2 V)
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 8000 V Human Body Model (A114-A)
  • 200 V Machine Model (A115-A)
  • 1000 V Charged-Device Model (C101)

• Technology Family
• AVC
• Applications
• UART, JTAG, SPI
• Bits (#)
• 4
• High input voltage (Min) (Vih)
• 1.2
• High input voltage (Max) (Vih)
• 3.6
• Vout (Min) (V)
• 1.2
• Vout (Max) (V)
• 3.6
• IOH (Max) (mA)
• -12
• IOL (Max) (mA)
• 12
• Rating
• Catalog

SN74AVCH4T245的完整型号有：74AVCH4T245RSVR-NT、SN74AVCH4T245D、SN74AVCH4T245DGVR、SN74AVCH4T245DR、SN74AVCH4T245DT、SN74AVCH4T245PW、SN74AVCH4T245PWR、SN74AVCH4T245PWT、SN74AVCH4T245RGYR、SN74AVCH4T245RSVR，以下是这些产品的关键参数及官网采购报价：

74AVCH4T245RSVR-NT，工作温度：-40 to 85，封装：UQFN (RSV)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网74AVCH4T245RSVR-NT的批量USD价格：.581（1000+）

SN74AVCH4T245D，工作温度：-40 to 85，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245D的批量USD价格：.634（1000+）

SN74AVCH4T245DGVR，工作温度：-40 to 85，封装：TVSOP (DGV)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245DGVR的批量USD价格：.528（1000+）

SN74AVCH4T245DR，工作温度：-40 to 85，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245DR的批量USD价格：.528（1000+）

SN74AVCH4T245DT，工作温度：-40 to 85，封装：SOIC (D)-16，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245DT的批量USD价格：.634（1000+）

SN74AVCH4T245PW，工作温度：-40 to 85，封装：TSSOP (PW)-16，包装数量MPQ：90个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245PW的批量USD价格：.634（1000+）

SN74AVCH4T245PWR，工作温度：-40 to 85，封装：TSSOP (PW)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245PWR的批量USD价格：.528（1000+）

SN74AVCH4T245PWT，工作温度：-40 to 85，封装：TSSOP (PW)-16，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245PWT的批量USD价格：.634（1000+）

SN74AVCH4T245RGYR，工作温度：-40 to 85，封装：VQFN (RGY)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245RGYR的批量USD价格：.554（1000+）

SN74AVCH4T245RSVR，工作温度：-40 to 85，封装：UQFN (RSV)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVCH4T245RSVR的批量USD价格：.581（1000+）

14-24-LOGIC-EVM — 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。

14-24-NL-LOGIC-EVM — Generic 14 through 24 pin non-leaded package evaluation module

Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.

AVCLVCDIRCNTRL-EVM — 适用于方向控制双向转换器件、支持 AVC 和 LVC 的通用 EVM

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。

HSPICE MODEL OF SN74AVCH4T245

此参考设计使用电感式感应和霍尔效应感应技术来提供人机界面。电感式感应器件在无缝表面上提供八个不同的触控按钮，而霍尔效应传感器用于提供可以旋转并用作额外按钮的磁旋钮。

通过电感式感应触控按钮，可提供使用按压力来确定按钮按压的强大解决方案。这能够让触控按钮支持佩戴手套操作，同时无需顾及按钮表面的灰尘或损坏等环境因素。霍尔效应传感器旋钮提供非接触式旋转，减少了传统接触式方案（如电位器或旋转编码器）中的磨损。