74AVCH1T45DBVR Texas Instruments Integrated Circuit (SOT23 (6-Pin)) In Stock
74AVCH1T45DBVR is a single-bit bidirectional voltage-translating bus transceiver from Texas Instruments supporting 1.2 V to 3.6 V on port A and 1.2 V to 3.6 V on port B for mixed-voltage systems. It features non-inverting CMOS logic translation in a tiny 6-pin SOT-23 package. Suitable for I2C, SPI, and GPIO level-shifting between microcontrollers and peripherals.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- 74AVCH1T45DBVR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74AVCH1T45DBVR?
- Bidirectional 1-bit voltage translation between 1.2 V to 3.6 V supply domains without external pull-up resistors
- Non-inverting CMOS output with tri-state control for flexible bus direction switching in mixed-voltage designs
- Ultra-compact 6-pin SOT-23 package occupying under 10 mm² for space-critical multi-rail IoT and wearable PCBs
What is 74AVCH1T45DBVR used for?
74AVCH1T45DBVR is used to bridge logic-level differences between 1.8 V microcontrollers and 3.3 V peripherals such as sensors, EEPROMs, and display drivers in IoT nodes and wearables. Its bidirectional capability with direction-control pin simplifies I2C and SPI line adaptation without additional discrete components. The device also serves mixed-supply FPGA I/O interfaces and camera module signal conditioning where 1.2 V to 3.6 V translation on individual data lines is required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the 74AVCH1T45DBVR datasheet?
74AVCH1T45DBVR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74AVCH1T45DBVR?
Compatible alternatives and drop-in replacements for 74AVCH1T45DBVR:
Bus Transceiver, AVC Series, 1-Func, 1-Bit, True Output, CMOS, PDSO6
Bus Transceiver, AVC Series, 1-Func, 1-Bit, True Output, CMOS, PDSO6
Bus Transceiver, AVC Series, 1-Func, 1-Bit, True Output, CMOS, PDSO6
Bus Transceiver, AVC Series, 1-Func, 1-Bit, True Output, CMOS, PDSO6
Frequently Asked Questions
What voltage domains does 74AVCH1T45DBVR support and how does it handle 1.8 V to 3.3 V translation?
74AVCH1T45DBVR supports independent supply voltages of 1.2 V to 3.6 V on each port, covering 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V rails in a single device. For a 1.8 V microcontroller communicating with a 3.3 V sensor, only 2 signal wires and no external resistors are needed beyond the device's 6 pins — simplifying BOM and reducing total current consumption by approximately 2 mA versus discrete resistor dividers.
For an IoT sensor PCB, how does the 74AVCH1T45DBVR SOT-23 package compare to larger 8-pin SOIC level translators?
The 6-pin SOT-23 package measures 1.6 mm x 2.9 mm, consuming under 5 mm² of board area — roughly 5x smaller than the 8-pin SOIC footprint of 19 mm². For designs translating a single SPI chip-select or I2C SDA line, using 74AVCH1T45DBVR avoids the 7 unused pins and extra routing lanes that an 8-channel translating IC would impose on a compact 10 mm x 10 mm sensor module.
When should 74AVCH1T45DBVR be chosen over a resistor-divider for GPIO level shifting between 1.8 V and 3.3 V logic?
A resistor divider can shift 3.3 V to 1.8 V on a unidirectional signal but cannot drive signals back from 1.8 V to 3.3 V, and its RC time constant limits signal rise times above 1 MHz. 74AVCH1T45DBVR provides bidirectional CMOS drive with propagation delay under 5 ns, making it correct for SPI CLK lines at 10 MHz and bidirectional I2C open-drain buses where the divider's high impedance causes voltage sag below logic-high thresholds.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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