The SN74LVC4245APW is a non-inverting Octal Bus Transceiver and 3.3 to 5V Shifter with 3-state outputs. 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 input can be used to disable the device so the buses are effectively isolated. The control circuitry is powered by VCCA. The SN74LVC4245A device terminal out allows the designer to switch to a normal all 3.3 or all 5V 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.
Description 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. 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 Applications • ATCA Solutions • CPAP Machines • Cameras: Surveillance Analog • Chemical or Gas Sensors • CT Scanners • DLP 3D Machine Vision and Optical Networking • Digital Signage • ECGs: Electrocardiograms • Field Transmitters: Pressure Sensors and Temperature Sensors • High-Speed Data Acquisition and Generation • HMI (Human Machine Interface) • RF4CE Remote Controls • Server Motherboards • Software Defined Radios (SDR) • Wireless LAN Cards and Data Access Cards • X-ray: Medical, Dental, and Baggage Scanners
The 74LVX4245MTC is a 8-bit dual-supply Translating Transceiver with 3-state outputs. It is designed to interface between a 5V bus and a 3V bus in a mixed 3/5V supply environment. The transmit/receive (T/R) input determines the direction of data flow. Transmit (active-HIGH) enables data from A ports to B ports, receive (active-LOW) enables data from B ports to A ports. The output enables input, when HIGH disables both A and B ports by placing them in a high impedance condition. The A port interfaces with the 5V bus, the B port interfaces with the 3V bus. The LVX4245 is suitable for mixed voltage applications such as laptop computers using 3.3V CPUs and 5V LCD displays.