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74AVCH8T245BQ,118

74AVCH8T245BQ,118

Nexperia USA Inc.
Translation Transceiver 1 Element 8 Bit per Element 3-State Output 24-DHVQFN (5.5x3.5)
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Overview

The 74AVCH8T245BQ is an 8-bit, dual-supply translating transceiver featuring 3-state outputs and bus-hold circuitry. It is designed to interface between components operating at different voltage nodes ranging from 0.8V to 3.6V, making it suitable for low-voltage logic environments.

Why Choose This Part

The integrated bus-hold feature eliminates the need for external pull-up or pull-down resistors on active inputs, saving board space and reducing component count. It features IOFF circuitry for partial power-down protection and high ESD resistance, with HBM protection exceeding 8000V.

Applications

Mixed-Voltage SPI/I2C Bridging
Translating 1.8V microcontroller signals to 3.3V peripheral logic or vice versa across 8 parallel bits.
Legacy System Integration
Interfacing modern sub-1V processors with standard 2.5V or 3.3V industrial I/O subsystems.
Data Bus Isolation
Utilizing the 3-state output and suspend mode to isolate bus segments during power-down or sleep cycles.
High-Speed Signal Buffering
Providing 12mA drive strength for signals across backplanes or long PCB traces in multi-voltage systems.

Key Specifications

Logic Type Translation Transceiver
Output Type 3-State
Mounting Type Surface Mount
Package / Case 24-VFQFN Exposed Pad
Voltage - Supply 0.8V ~ 3.6V
Number of Elements 1
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 24-DHVQFN (5.5x3.5)
Current - Output High, Low 12mA, 12mA
Number of Bits per Element 8

Getting Started

When designing with this part, ensure VCC(A) and VCC(B) are properly decoupled with 0.1uF capacitors and that the direction control (DIR) and output enable (OE) pins are tied to the appropriate supply rail. The DHVQFN24 package includes an exposed thermal pad that should be soldered to the PCB ground plane for improved thermal and mechanical performance.