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Direction-controlled voltage translators

SN74AVC1T45

ACTIVE

Single-Bit Dual-Supply Bus Transceiver with Configurable Voltage-Level Shifting and 3-State Outputs

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Data sheet

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SN74AXC1T45 ACTIVE Single-bit dual-supply bus transceiver Pin-to-pin upgrade with a wider voltage range and improved performance

SN74AVC1T45

ACTIVE
Data sheet Order now

Product details

Technology family AVC Applications GPIO Bits (#) 1 High input voltage (min) (V) 0.78 High input voltage (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Data rate (max) (Mbps) 500 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 20 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Catalog Operating temperature range (°C) -40 to 85
Technology family AVC Applications GPIO Bits (#) 1 High input voltage (min) (V) 0.78 High input voltage (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Data rate (max) (Mbps) 500 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 20 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YZP) 6 2.1875 mm² 1.75 x 1.25 SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8 SOT-5X3 (DRL) 6 2.56 mm² 1.6 x 1.6 SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1
  • Available in the Texas Instruments NanoFree™ package
  • Fully configurable dual-rail design allows each port to operate over the full 1.08V to 3.6V power-supply range
  • VCC isolation feature – if either VCC input is at GND, then both ports are in the high-impedance state
  • DIR input circuit referenced to VCCA
  • ±12mA output drive at 3.3V
  • I/Os are 4.6V tolerant
  • Ioff supports partial-power-down mode operation
  • Typical maximum data rates
    • 500Mbps (1.08V to 3.3V translation)
    • 320Mbps (<1.8V to 3.3V translation)
    • 320Mbps (translate to 2.5V or 1.8V)
    • 280Mbps (translate to 1.5V)
    • 240Mbps (translate to 1.2V)
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • ±2000V Human Body Model (A114-A)
    • 200V Machine Model (A115-A)
    • ±1000V Charged-Device Model (C101)
  • Available in the Texas Instruments NanoFree™ package
  • Fully configurable dual-rail design allows each port to operate over the full 1.08V to 3.6V power-supply range
  • VCC isolation feature – if either VCC input is at GND, then both ports are in the high-impedance state
  • DIR input circuit referenced to VCCA
  • ±12mA output drive at 3.3V
  • I/Os are 4.6V tolerant
  • Ioff supports partial-power-down mode operation
  • Typical maximum data rates
    • 500Mbps (1.08V to 3.3V translation)
    • 320Mbps (<1.8V to 3.3V translation)
    • 320Mbps (translate to 2.5V or 1.8V)
    • 280Mbps (translate to 1.5V)
    • 240Mbps (translate to 1.2V)
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • ±2000V Human Body Model (A114-A)
    • 200V Machine Model (A115-A)
    • ±1000V Charged-Device Model (C101)

This single-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC1T45 is operational with VCCA/VCCB as low as 1.08V.

The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.08V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.08V to 3.6V. This allows for universal low-voltage, bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.

The SN74AVC1T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74AVC1T45 is designed so that the DIR input is powered by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The VCC isolation feature is designed so that if either VCC input is at GND, then both ports are in the high-impedance state.

NanoFree package technology is a major breakthrough in IC packaging concepts, using the die as the package.

This single-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC1T45 is operational with VCCA/VCCB as low as 1.08V.

The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.08V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.08V to 3.6V. This allows for universal low-voltage, bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.

The SN74AVC1T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74AVC1T45 is designed so that the DIR input is powered by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The VCC isolation feature is designed so that if either VCC input is at GND, then both ports are in the high-impedance state.

NanoFree package technology is a major breakthrough in IC packaging concepts, using the die as the package.
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Technical documentation

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Type Title Date
* Data sheet SN74AVC1T45 Single-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and 3-State Outputs datasheet (Rev. J) PDF | HTML 24 Aug 2024
Application note Schematic Checklist - A Guide to Designing With Fixed or Direction Control Translators PDF | HTML 02 Oct 2024
Application note Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators PDF | HTML 12 Jul 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
EVM User's guide Generic AVC and LVC Direction Controlled Translation EVM (Rev. B) 30 Jul 2021
Selection guide Voltage Translation Buying Guide (Rev. A) 15 Apr 2021
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
Application note Voltage Translation Between 3.3-V, 2.5-V, 1.8-V, and 1.5-V Logic Standards (Rev. B) 30 Apr 2015
Test report TI Power Reference Design for Xilinx® Artix®-7 (AC701) 12 May 2014
User guide PMP7977 User's Guide 11 Sep 2013
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note Selecting the Right Level Translation Solution (Rev. A) 22 Jun 2004
More literature LCD Module Interface Application Clip 09 May 2003
User guide AVC Advanced Very-Low-Voltage CMOS Logic Data Book, March 2000 (Rev. C) 20 Aug 2002
More literature Standard Linear & Logic for PCs, Servers & Motherboards 13 Jun 2002
Application note 16-Bit Widebus Logic Families in 56-Ball, 0.65-mm Pitch Very Thin Fine-Pitch BGA (Rev. B) 22 May 2002
Application note Dynamic Output Control (DOC) Circuitry Technology And Applications (Rev. B) 07 Jul 1999
Application note AVC Logic Family Technology and Applications (Rev. A) 26 Aug 1998

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

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User guide: PDF
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Evaluation board

AVCLVCDIRCNTRL-EVM — Generic EVM for Direction-Controlled Bidirectional Translation Device Supporting AVC and LVC

The generic EVM is designed to support one, two, four and eight channel LVC and AVC direction-controlled translation devices. It also supports the bus hold and automotive -Q1 devices in the same number of channels. The AVC are low voltage translation devices with lower drive strength of 12mA. LVC (...)

User guide: PDF
Not available on TI.com
Evaluation board

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The TMP114EVM allows users to evaluate the performance of the TMP114 digital temperature sensor. The evaluation module (EVM) comes in a USB-stick form factor, with an onboard MSP430F5528 microcontroller that interfaces with both the host computer and the TMP114 device using an I2C interface.

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Development kit

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The EVMK2GX (also known as "K2G") 1GHz evaluation module (EVM) enables developers to immediately start evaluating the 66AK2Gx processor family, and to accelerate the development of audio, industrial motor control, smart grid protection and other high reliability, real-time compute intensive (...)

User guide: PDF
Not available on TI.com
Simulation model

SN74AVC1T45 IBIS Model (Rev. B)

SCEM436B.ZIP (118 KB) - IBIS Model
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PCB layout

PMP7977 PCB

TIDU151.PDF (6781 KB)
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Many TI reference designs include the SN74AVC1T45

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Package Pins CAD symbols, footprints & 3D models
DSBGA (YZP) 6 Ultra Librarian
SOT-23 (DBV) 6 Ultra Librarian
SOT-5X3 (DRL) 6 Ultra Librarian
SOT-SC70 (DCK) 6 Ultra Librarian
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