Texas Instruments SN74AXC4T774PWR

The SN74AXC4T774 is a 4-bit, dual-supply non-inverting bidirectional voltage level translation device produced by Texas Instruments. This device is designed for asynchronous communication between data buses and features a fully configurable dual-rail design. Each port can operate with a power supply range from 0.65 V to 3.6 V, making it versatile for various voltage nodes such as 0.7 V, 0.8 V, 0.9 V, 1.2 V, 1.8 V, 2.5 V, and 3.3 V.

• Fully Configurable Dual-Rail Design: Each port can operate with a power supply range from 0.65 V to 3.6 V, allowing for translation between various voltage nodes.
• High-Speed Translation: Supports data rates up to 310 Mbps, making it suitable for high-speed applications.
• Partial Power Down (I_off): Inputs and outputs enter a high-impedance state when the device is powered down, preventing current backflow.
• V_CC Isolation: Inputs and outputs enter a high-impedance state if either supply is less than 100 mV.
• Glitch-Free Power Supply Sequencing: Allows either supply rail to be powered on or off in any order without producing glitches on the I/Os.
• Integrated Static Pull-Down Resistors: 71kΩ typical integrated weak pull-downs on all data I/Os to avoid floating inputs.
• Over-Voltage Tolerant Inputs: Input signals can be driven above the supply voltage, provided they remain below the maximum input voltage.

The SN74AXC4T774 is ideal for level-translation applications in various systems, including:

• Interfacing Devices at Different Voltage Nodes: Translates signals between devices operating at different voltage levels.
• Asynchronous Communication Between Data Buses: Enables data transmission between buses with different voltage requirements.
• High-Speed Data Transfer: Suitable for applications requiring high data rates, such as translating SPI signals between an SoC and other peripherals.

1. What is the operating voltage range for the SN74AXC4T774?

   The device operates with a supply voltage range from 0.65 V to 3.6 V for both V_CCA and V_CCB ports.

2. What is the maximum data rate supported by the SN74AXC4T774?

   The device can support data rates up to 310 Mbps, for example, when translating a signal from 1.8 V to 3.3 V.

3. What are the available package options for the SN74AXC4T774?

   The device is available in TSSOP (16-pin), WQFN (16-pin), and UQFN (16-pin) packages.

4. How does the SN74AXC4T774 handle power sequencing?

   The device allows glitch-free power supply sequencing, enabling either supply rail to be powered on or off in any order without producing glitches on the I/Os.

5. What is the purpose of the integrated static pull-down resistors?

   The 71kΩ typical integrated weak pull-downs on all data I/Os help avoid floating inputs and reduce external component count.

6. Can the input signals be driven above the supply voltage?

   Yes, input signals can be driven above the supply voltage, provided they remain below the maximum input voltage specified.

7. How does the device handle partial power down?

   During partial power down, the inputs and outputs enter a high-impedance state, preventing current backflow into the device.

8. What is the ESD rating for the SN74AXC4T774?

   The device has an ESD rating of ±8000 V (HBM) and ±1000 V (CDM).

9. What is the operating temperature range for the SN74AXC4T774?

   The device operates over a temperature range of -40°C to 125°C.

10. How do the control pins (DIRx and OE) function?

    The control pins (DIRx and OE) are referenced to V_CCA and control the direction of data transmission and the output enable state.