Overview
The SN74LXC8T245-Q1 is an 8-bit, dual-supply noninverting bidirectional voltage level translation device produced by Texas Instruments. This component is designed for automotive applications and is AEC-Q100 qualified, ensuring it meets the stringent requirements of the automotive industry. The device allows for voltage level translation between two different voltage domains, with each port capable of operating from 1.1 V to 5.5 V. The control logic, including the direction-control signal (DIR) and output enable (OE), is referenced to the VCCA logic levels, while the Bx pins are referenced to VCCB logic levels. This flexibility makes it suitable for a wide range of applications where voltage level translation is necessary.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW), VQFN (RHL), VSSOP (DGS) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 125 | °C |
| VCCA and VCCB Voltage Range | 1.1 to 5.5 | V |
| Maximum Data Rate | Up to 420 Mbps (for 3.3 V to 5.0 V) | Mbps |
| Low-Level Output Voltage (IOL = 100 µA) | 0.1 | V |
| High Drive Strength | Up to 32 mA at 5 V | mA |
| Power Consumption (25°C) | 4 µA maximum | µA |
| ESD Protection | 4000-V Human-Body Model, 1000-V Charged-Device Model | V |
Key Features
- AEC-Q100 qualified for automotive applications.
- Fully configurable dual-rail design allowing each port to operate from 1.1 V to 5.5 V.
- Robust, glitch-free power supply sequencing.
- Schmitt-trigger inputs to handle slow or noisy inputs.
- I/Os with integrated dynamic pull-down resistors to reduce external component count.
- Control inputs with integrated static pull-down resistors for floating control inputs.
- High drive strength (up to 32 mA at 5 V).
- Low power consumption with maximum 4 µA at 25°C.
- VCC isolation and VCC disconnect (Ioff-float) feature for partial-power-down mode operation.
- Compatible with LVC family level shifters.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- Operating temperature range from –40°C to +125°C.
Applications
- Infotainment head units.
- Advanced Driver Assistance Systems (ADAS) fusion.
- Driving indicator LEDs or buzzers.
- Debouncing mechanical switches.
- Eliminating slow or noisy input signals.
Q & A
- What is the SN74LXC8T245-Q1 used for?
The SN74LXC8T245-Q1 is an 8-bit, dual-supply noninverting bidirectional voltage level translation device, primarily used in automotive applications for voltage level translation between different voltage domains.
- What are the operating voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can operate from 1.1 V to 5.5 V.
- What is the maximum data rate supported by the SN74LXC8T245-Q1?
The device supports up to 420 Mbps for 3.3 V to 5.0 V operations.
- What is the significance of the DIR and OE control signals?
The DIR signal controls the direction of data transmission (A to B or B to A), and the OE signal enables or disables the outputs, placing them in a high-impedance state when set to high.
- What kind of ESD protection does the SN74LXC8T245-Q1 offer?
The device offers ESD protection exceeding 4000-V Human-Body Model and 1000-V Charged-Device Model.
- What is the power consumption of the SN74LXC8T245-Q1 at 25°C?
The maximum power consumption at 25°C is 4 µA.
- Is the SN74LXC8T245-Q1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What are the thermal characteristics of the SN74LXC8T245-Q1?
The device operates within a temperature range of –40°C to +125°C and has specified thermal resistances for different packages.
- How does the VCC isolation and VCC disconnect feature work?
If either VCC supply is below 100 mV or disconnected, all I/Os are pulled down and then become high-impedance, supporting partial-power-down mode operation.
- What are some common applications of the SN74LXC8T245-Q1?
Common applications include infotainment head units, ADAS fusion, driving indicator LEDs or buzzers, and debouncing mechanical switches.
