CMU 8-bit Bus Transceiver Shaper Development Board - CJMCU-245

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.

Features

• 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

Package Include

1 x CJMCU-245 SN74LVC4245A LJ245A 8-bit Bus Transceiver