74AVCH1T45FU
CMOS Digital Integrated Circuits Silicon Monolithic 74AVCH1T45FU
1. Functional Description
• 1-Bit Dual-Supply Bus Transceiver with Bushold and Configurable Power Supply 2. General
The 74AVCH1T45FU is a dual-supply, high-speed CMOS 1-bit bus transceiver with bus hold circuitry that allows
interfacing 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. The bus hold function holds the voltage at the bus terminal input.
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. By setting one or both power
supplies to GND, the internal buffer is placed in a high-impedance mode, and the bus terminals supplied with
power are placed in bus hold mode.
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. Start of commercial production 2025-08
©2026 Toshiba Electronic Devices & Storage Corporation 1 2026-04-21
Rev.2.0.A 74AVCH1T45FU
4. Packaging US6 5. Pin Assignment 6. Marking ©2026 Toshiba Electronic Devices & Storage Corporation 2 2026-04-21
Rev.2.0.A 74AVCH1T45FU …
