SN74LVC4245A LJ245A 八路匯流排 收發器 移位器開發板
典型的雙電源供電的雙向收發器,通過DIR管腳控制傳輸方向。
收發器:收發器是信號轉換的一種裝置,通常是指光纖收發器。 光纖收發器的出現,將雙絞線電信號和光信號進行相互轉換,確保了資料包在兩個網路間順暢傳輸,同時它將網路的傳輸距離極限從銅線的100米擴展到100公里(單模光纖)。
This 8-bit (octal) noninverting bus transceiver contains two separate supply rails; B port has VCCB, which is set at 3.3 V, and A port has VCCA, which is set at 5 V. This allows for translation from a 3.3-V to a 5-V environment, and vice versa.
The SN74LVC4245A 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 at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. The control circuitry (DIR, OE) is powered by VCCA.
The SN74LVC4245A device terminal out allows the designer to switch to a normal all-3.3-V or all-5-V 20-terminal SN74LVC4245 device without board re-layout. The designer uses the data paths for pins 2–11 and 14–23 of the SN74LVC4245A device to align with the conventional ’245 terminal out.
- Bidirectional Voltage Translator
- 5.5 V on A Port and 2.7 V to 3.6 V on B Port
- Control Inputs VIH/VIL Levels Are
Referenced to VCCA Voltage - Latch-Up Performance Exceeds 250 mA
Per JESD 17 - ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model
- 200-V Machine Model
- 1000-V Charged-Device Model
- 晶片手冊位址:
- https://www.ti.com.cn/product/cn/SN74LVC4245A/description





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