74AVC1T45FU
CMOS Digital Integrated Circuits Silicon Monolithic 74AVC1T45FU
1. Functional Description
• 1-Bit Dual-Supply Bus Transceiver with Configurable Power Supply 2. General
The 74AVC1T45FU is a dual-supply, high-speed CMOS 1-bit bus transceiver that can interface between two
systems with supply voltages from 0.8 V to 3.6 V. The two supply voltages can be user-configurable within the
operating range and the sequence of supply voltage ON/OFF can be freely set.
When the transmission direction switching input DIR is set to "H", bus A becomes an input and bus B becomes
an output, and when set to "L", bus A becomes an output and bus B becomes an input.The input (DIR) has a
tolerant function that allows input of up to 3.6 V regardless of the supply voltage. When either power supply is
at the GND level, the bus terminals are placed in a high impedance mode and a voltage of up to 3.6 V is allowed
to be applied. This feature allows for partial power-down interface applications.
All inputs are equipped with protection circuits to protect the devices from electrostatic discharge damage. 3. Features
(1) Wide operating temperature range: Topr = -40 to 125 � (2) Wide supply voltage value: VCCA = 0.8 to 3.6 V, VCCB = 0.8 to 3.6 V (3) Bidirectional interface (4) High-speed operation: tpd = 4.1 ns (max) (VCCA = 3.3 ± 0.3 V, VCCB = 3.3 ± 0.3 V) (5) Output current: |IOH|/IOL = ± 12 mA (min) (VCC = 3.0 V)
|IOH|/IOL = ± 9 mA (min) (VCC = 2.3 V)
|IOH|/IOL = ± 6 mA (min) (VCC = 1.65 V)
|IOH|/IOL = ± 4 mA (min) (VCC = 1.4 V)
|IOH|/IOL = ± 2 mA (min) (VCC = 1.1 V) (6) Small package: US6 (Package code: SOT-363) (7) Low power dissipation: Suitable for battery-driven applications such as PDAs and cellular phones. (8) 3.6 V tolerance and power-down protection are provided to all inputs and outputs. 4. Packaging US6 Start of commercial production 2025-08
©2026 Toshiba Electronic Devices & Storage Corporation 1 2026-04-21
Rev.2.0.A 74AVC1T45FU
5. Pin Assignment 6. Marking 7. Block Diagram ©2026 Toshiba Electronic Devices & Storage Corporation 2 2026-04-21
Rev.2.0.A 74AVC1T45FU
8. Truth Table …
