Overview
The SN74AXC4T774BQBR 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 supports a wide range of voltage levels, making it versatile for various applications. It features a fully configurable dual-rail design, allowing each port to operate with power supply ranges from 0.65 V to 3.6 V. The device is ideal for level-translation applications, particularly where different voltage nodes need to be interfaced.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Min) | 0.65 | V |
| Supply Voltage (Max) | 3.6 | V |
| Propagation Delay Time | 5 | ns |
| Package / Case | WQFN-16 | |
| Operating Temperature Range | -40 to 125 | °C |
| Data Rate (Max) | 310 | Mbps |
Key Features
- Fully configurable dual-rail design allowing each port to operate with a power supply range from 0.65 V to 3.6 V.
- Supports partial-power-down mode operation with Ioff current protection to prevent excessive current draw.
- VCC isolation feature: inputs and outputs enter high-impedance state if either supply is less than 100 mV.
- Glitch-free power supply sequencing: either supply rail can be powered on or off in any order without producing glitches on the I/Os.
- Integrated static pull-down resistors (71 kΩ typical) on all data I/Os to avoid floating inputs.
- High-speed translation capability: supports data rates up to 310 Mbps when translating signals from 1.8 V to 3.3 V.
- Over-voltage tolerant inputs: input signals can be driven above the supply voltage as long as they remain below the maximum input voltage.
- Balanced high-drive CMOS push-pull outputs capable of sinking and sourcing similar currents.
Applications
The SN74AXC4T774BQBR is ideal for level-translation applications in various systems, including:
- Interfacing devices or systems operating at different voltage levels (e.g., translating signals from 3.3 V to 1.8 V or vice versa).
- Applications where a push-pull driver is connected to the data I/Os, such as in SPI interfaces between SoCs and FPGAs.
- Systems requiring glitch-free power supply sequencing to prevent unintended device resets or configurations.
Q & A
- What is the voltage range for the power supplies of the SN74AXC4T774BQBR?
The device can operate with power supply ranges from 0.65 V to 3.6 V for both VCCA and VCCB supplies.
- What is the maximum data rate supported by the SN74AXC4T774BQBR?
The device can support data rates up to 310 Mbps when translating signals from 1.8 V to 3.3 V).
- How does the SN74AXC4T774BQBR handle power supply 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).
- What is the purpose of the integrated static pull-down resistors on the SN74AXC4T774BQBR?
The integrated static pull-down resistors (71 kΩ typical) help avoid floating inputs on the I/Os, reducing external component count and preventing unstable outputs or increased current consumption).
- Can the SN74AXC4T774BQBR operate in partial-power-down mode?
- What is the operating temperature range of the SN74AXC4T774BQBR?
The device operates over a temperature range of -40°C to 125°C).
- What package options are available for the SN74AXC4T774BQBR?
The device is available in WQFN-16, TSSOP-16, and UQFN-16 packages).
- How do the control pins (DIRx and OE) function in the SN74AXC4T774BQBR?
The control pins (DIRx and OE) are referenced to VCCA and control the direction of data transmission and output enable/disable states).
- What is the propagation delay time of the SN74AXC4T774BQBR?
The propagation delay time is 5 ns).
- Are the outputs of the SN74AXC4T774BQBR over-voltage tolerant?
