Overview
The SN74AXC4T774RSVR is a 4-bit dual-supply bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between data buses and features a fully configurable dual-rail design. It operates with two individually configurable power-supply rails, allowing each port to function with supply voltages ranging from 0.65 V to 3.6 V. The device is suitable for level translation applications, enabling communication between devices or systems operating at different voltage levels.
Key Specifications
| Parameter | Value |
|---|---|
| Package | UQFN (RSV), 16 pins |
| Operating Temperature Range | -40°C to 125°C |
| Power Supply Range | 0.65 V to 3.6 V (VCCA and VCCB) |
| Data Rate | Up to 310 Mbps (1.8 V to 3.3 V translation) |
| ESD Protection | 8000-V human-body model, 1000-V charged-device model |
| Latch-up Performance | Exceeds 100 mA per JESD 78, Class II |
| Package Size | 2.6mm × 1.8mm |
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.
- Independent direction control pins for configurable up and down translation.
- Glitch-free power supply sequencing.
- VCC isolation feature: if either VCCA or VCCB is below 100 mV, all I/O outputs are disabled and become high-impedance.
- Ioff supports partial-power-down mode operation.
- Compatible with AVC family level shifters.
- Integrated static pull-down resistors (71kΩ typical) on all data I/Os.
- Supports high-speed translation up to 310 Mbps.
Applications
The SN74AXC4T774RSVR is ideal for level-translation applications in various systems, including:
- Interfacing devices or systems operating at different voltage levels.
- Translating low voltage signals from an SoC to higher voltage signals and vice versa.
- Serial Peripheral Interface (SPI) and Joint Test Action Group (JTAG) interface applications.
- Partial-power-down applications where Ioff current is crucial.
Q & A
- What is the operating temperature range of the SN74AXC4T774RSVR?
The operating temperature range is from -40°C to 125°C.
- What is the power supply range for the SN74AXC4T774RSVR?
The device operates with supply voltages ranging from 0.65 V to 3.6 V for both VCCA and VCCB.
- What is the maximum data rate supported by the SN74AXC4T774RSVR?
The device supports up to 310 Mbps data rate when translating from 1.8 V to 3.3 V.
- Does the SN74AXC4T774RSVR have built-in ESD protection?
- How does the VCC isolation feature work?
If either VCCA or VCCB is below 100 mV, all I/O outputs are disabled and become high-impedance.
- What is the purpose of the Ioff current in the SN74AXC4T774RSVR?
The Ioff current supports partial-power-down mode operation, preventing excessive current draw when the device is powered down.
- Can the SN74AXC4T774RSVR be used in single-supply systems?
- How do the direction control pins (DIRx) function?
The direction control pins (DIRx) allow configurable up and down translation between the A and B buses.
- What is the purpose of the output-enable input (OE)?
The output-enable input (OE) is used to disable the outputs, putting the buses in a high-impedance state.
- Does the SN74AXC4T774RSVR have integrated pull-down resistors?
