The SN74AVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track V_CCA, which accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V_CCB, which also accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVCH8T245 is designed for asynchronous communication between data buses. The device transmits data from either the A bus to the B bus, or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are effectively isolated.

The SN74AVCH8T245 is designed so that the control pins (DIR and OE) are referenced to V_CCA.

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.

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.

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

The SN74AVCH8T245 solution is compatible with a single-supply system and can be replaced later with a ’245 function, with minimal printed circuit board redesign.

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

• Control Inputs (DIR and OE) VIH and VIL Levels Are Referenced to VCCA Voltage
• Bus Hold on Data Inputs Eliminates the Need for External Pullup or Pulldown Resistors
• VCC Isolation Feature
• Fully Configurable Dual-Rail Design
• I/Os Are 4.6-V Tolerant
• Ioff Supports Partial-Power-Down Mode Operation
• Max Data Rates:
  • 320 Mbps (VCCA ≥ 1.8 V and VCCB ≥ 1.8 V)
  • 170 Mbps (VCCA ≤ 1.8 V or VCCB ≤ 1.8 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
• Bits (#)
• 8
• 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

SN74AVCH8T245的完整型号有：SN74AVCH8T245DGVR、SN74AVCH8T245PW、SN74AVCH8T245PWR、SN74AVCH8T245RHLR，以下是这些产品的关键参数及官网采购报价：

SN74AVCH8T245DGVR，工作温度：-40 to 85，封装：TVSOP (DGV)-24，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SN74AVCH8T245DGVR的批量USD价格：.497（1000+）

SN74AVCH8T245PW，工作温度：-40 to 85，封装：TSSOP (PW)-24，包装数量MPQ：60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SN74AVCH8T245PW的批量USD价格：.596（1000+）

SN74AVCH8T245PWR，工作温度：-40 to 85，封装：TSSOP (PW)-24，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SN74AVCH8T245PWR的批量USD价格：.497（1000+）

SN74AVCH8T245RHLR，工作温度：-40 to 85，封装：VQFN (RHL)-24，包装数量MPQ：1000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SN74AVCH8T245RHLR的批量USD价格：.522（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。