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74LVC8T245BQ

74LVC8T245BQ

MPN: 74LVC8T245BQ,118
Nexperia USA Inc.
Translation Transceiver 1 Element 8 Bit per Element 3-State Output 24-DHVQFN (5.5x3.5)
Active41,995 in stock
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Overview

The 74LVC8T245BQ is an 8-bit, dual-supply translating transceiver designed for bidirectional voltage level translation between 1.2V and 5.5V rails. It features two separate supply pins (VCC(A) and VCC(B)) that allow independent voltage levels on each side, making it ideal for interfacing legacy 5V logic with modern low-voltage microcontrollers.

Why Choose This Part

This transceiver supports a very wide supply range from 1.2V to 5.5V and provides high-drive 32mA outputs. The DHVQFN24 package includes an exposed thermal pad and offers a compact 3.5mm x 5.5mm footprint, while the Suspend Mode feature ensures high-impedance outputs if either VCC input is at ground.

Applications

I2C/SPI Level Shifting
Translating clock and data signals between 1.8V sensors and 3.3V or 5V host processors.
Mixed-Voltage Bus Interfacing
Connecting 8-bit parallel data buses between systems operating at different supply voltages.
GPIO Voltage Adaptation
Adapting general purpose I/O lines to meet the logic threshold requirements of peripheral ICs.
Isolation During Power-Down
Using the IOFF circuitry to prevent backflow current when one of the power rails is disabled.

Key Specifications

Logic Type Translation Transceiver
Output Type 3-State
Mounting Type Surface Mount
Package / Case 24-VFQFN Exposed Pad
Voltage - Supply 1.2V ~ 5.5V
Number of Elements 1
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 24-DHVQFN (5.5x3.5)
Current - Output High, Low 32mA, 32mA
Number of Bits per Element 8

Getting Started

To implement this device, connect the VCC(A) and VCC(B) pins to their respective logic supply rails and ensure the DIR pin is driven to set data flow direction. Use the OE pin to tri-state the outputs during system initialization to prevent bus contention. For prototyping, ensure the DHVQFN thermal pad is soldered to a ground plane for mechanical stability and heat dissipation.

Also Consider

TXB0108RGYR TITexas Instruments - Offers automatic direction sensing which eliminates the need for a DIR control pin, though with lower drive strength.
74AVCH8T245BQ Nexperia - Includes bus-hold circuitry to prevent floating inputs when the bus is not actively driven.