SN74AXC1T45DEAR | TI Texas Instruments | 1-Bit Dual-Supply Bus Transceiver (Bidirectional Level Shifter)

Brand: Texas Instruments (TI) | 1-Bit Dual-Supply Bus Transceiver (Bidirectional Level Shifter)

Suffix DEAR: X2SON-6 package, 1mm×1mm, tape & reel packaging

 Specifications

- Package: X2SON-6, 1.0×1.0×0.45mm, 6 pins

- Dual supply rails VCCA / VCCB: **0.65V ~ 3.6V**, independently configurable

- Data rate: Up to 500Mbps (1.8V ↔ 3.3V application)

- Propagation delay: Typical 5ns, push-pull output

- Quiescent current: Max 10μA @85℃; 16μA @125℃

- Operating temperature: **-40℃ ~ +125℃ (Industrial grade, non-automotive)**

- Pins: VCCA, GND, A, B, DIR, VCCB

- Protection features: Ioff partial power-down protection, VCC isolation (I/O becomes high-impedance when any supply falls below 100mV); ESD 8kV HBM

Compliance: RoHS

Functions

1. Single-channel bidirectional logic level translation. Signal direction controlled by DIR pin

 - DIR = High: A → B

 - DIR = Low: B → A

2. Enables communication between different voltage domains, e.g. 3.3V main MCU ↔ 1.8V sensor

3. Push-pull output, high-speed transmission, supports single signal lines such as GPIO, I2C and SPI

4. VCC isolation: I/O turns high-impedance when one side loses power to prevent back-feeding and device damage; Ioff enables partial power-saving design

5. Integrated glitch suppression to mitigate power-sequencing risks during power-up

 Applications

- Healthcare monitoring board: GPIO/I2C level translation between 3.3V MCU and 1.8V LIS2DW12TR accelerometer

- Wearable devices: Smart bands, TWS earbuds, smart rings, for PCB space-constrained designs (ultra-small package)

- Battery-powered IoT devices: Wireless sensors, asset tracking tags

- Portable industrial instruments, consumer electronics and small modules

 Key Notes

Ultra-small 1×1mm package to save PCB footprint. Only supports single-channel level translation. For multi-channel level shifting applications, please select multi-channel devices.