Overview
The SN74LVC1T45-Q1 device, manufactured by Texas Instruments, is a single-bit, noninverting bus transceiver designed for universal low-voltage bidirectional translation. It features a fully configurable dual-rail design, allowing each port to operate over a wide power supply range of 1.65V to 5.5V. This makes it an excellent choice for applications requiring translation between different voltage nodes such as 1.8V, 2.5V, 3.3V, and 5V.
The device is AEC-Q100 qualified, ensuring its suitability for automotive applications with an ambient operating temperature range of –40°C to +125°C. It also supports partial-power-down mode operation using Ioff circuitry, which prevents damaging current backflow when the device is powered down.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-SC70 (DCK) | |
| Pins | 6 | |
| Operating Temperature Range | –40 to 125 | °C |
| Supply Voltage (VCCA, VCCB) | 1.65 to 5.5 | V |
| Input Voltage (VI) | –0.5 to 6.5 | V |
| Output Drive at 3.3V | ±24 | mA |
| Maximum Data Rates | 420 Mbps (3.3V to 5V), 210 Mbps (to 3.3V), 140 Mbps (to 2.5V), 75 Mbps (to 1.8V) | Mbps |
| Junction Temperature | 150 | °C |
| Storage Temperature | –65 to 150 | °C |
Key Features
- Qualified for automotive applications and AEC-Q100 qualified.
- Fully configurable dual-rail design allowing each port to operate over the full 1.65V to 5.5V power-supply range.
- VCC isolation feature – if either VCC input is at GND, both ports are in the high-impedance state.
- DIR input circuit referenced to VCCA.
- ±24mA output drive at 3.3V.
- Ioff supports partial-power-down mode operation.
- Device HBM ESD Classification Level H2 and Device CDM ESD Classification Level C3B.
Applications
- Head units in automotive systems.
- Advanced Driver Assistance Systems (ADAS) – cameras.
- Telematics systems.
Q & A
- What is the SN74LVC1T45-Q1 device?
The SN74LVC1T45-Q1 is a single-bit, noninverting bus transceiver designed for universal low-voltage bidirectional translation.
- What is the operating temperature range of the SN74LVC1T45-Q1?
The device operates over an ambient temperature range of –40°C to +125°C.
- What are the power supply voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can operate over the full 1.65V to 5.5V power supply range.
- What is the maximum data rate supported by the SN74LVC1T45-Q1?
The maximum data rates are 420 Mbps (3.3V to 5V), 210 Mbps (to 3.3V), 140 Mbps (to 2.5V), and 75 Mbps (to 1.8V).
- Does the SN74LVC1T45-Q1 support partial-power-down mode operation?
- What is the output drive capability of the SN74LVC1T45-Q1 at 3.3V?
The output drive is ±24mA at 3.3V.
- What are the ESD classification levels for the SN74LVC1T45-Q1?
The device has an HBM ESD Classification Level H2 and a CDM ESD Classification Level C3B.
- How does the VCC isolation feature work?
If either VCC input is at GND, both ports are in the high-impedance state.
- What is the package type and pin count of the SN74LVC1T45-Q1?
The device is packaged in a SOT-SC70 (DCK) package with 6 pins.
- What are some typical applications of the SN74LVC1T45-Q1?
Typical applications include head units, ADAS cameras, and telematics systems in automotive environments.
