SN74AXC8T245

ACTIVE

Product details

Technology Family AXC Applications RGMII Bits (#) 8 High input voltage (Min) (Vih) 0.455 High input voltage (Max) (Vih) 3.6 Vout (Min) (V) 0.65 Vout (Max) (V) 3.6 IOH (Max) (mA) -12 IOL (Max) (mA) 12 Rating Catalog
Technology Family AXC Applications RGMII Bits (#) 8 High input voltage (Min) (Vih) 0.455 High input voltage (Max) (Vih) 3.6 Vout (Min) (V) 0.65 Vout (Max) (V) 3.6 IOH (Max) (mA) -12 IOL (Max) (mA) 12 Rating Catalog
TSSOP (PW) 24 34 mm² 7.7 x 4.4 UQFN (RJW) 24 8 mm² 4 x 2 VQFN (RHL) 24 19 mm² 5.5 x 3.5
  • Qualified Fully Configurable Dual-Rail Design Allows Each Port to Operate With a Power Supply Range From 0.65 V to 3.6 V
  • Operating Temperature From –40°C to +125°C
  • Multiple Direction Control Pins to Allow Simultaneous Up and Down Translation
  • Up to 380 Mbps Support When Translating from 1.8 V to 3.3 V
  • VCC Isolation Feature to Effectively Isolate Both Buses in a Power-Down Scenario
  • Partial Power-Down Mode to Limit Backflow Current in a Power-Down Scenario
  • Compatible With SN74AVC8T245 and 74AVC8T245 Level Shifters
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model
    • 1000-V Charged-Device Model
  • Qualified Fully Configurable Dual-Rail Design Allows Each Port to Operate With a Power Supply Range From 0.65 V to 3.6 V
  • Operating Temperature From –40°C to +125°C
  • Multiple Direction Control Pins to Allow Simultaneous Up and Down Translation
  • Up to 380 Mbps Support When Translating from 1.8 V to 3.3 V
  • VCC Isolation Feature to Effectively Isolate Both Buses in a Power-Down Scenario
  • Partial Power-Down Mode to Limit Backflow Current in a Power-Down Scenario
  • Compatible With SN74AVC8T245 and 74AVC8T245 Level Shifters
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model
    • 1000-V Charged-Device Model

The SN74AXC8T245 device is an 8-bit non-inverting bus transceiver that resolves voltage level mismatch between devices operating at the latest voltage nodes (0.7 V, 0.8 V, and 0.9 V) and devices operating at industry standard voltage nodes (1.8 V, 2.5 V, 3.3 V) and vice versa.

The device operates by using two independent power-supply rails (VCCA and VCCB) that operate as low as 0.65 V. Data pins A1 through A8 are designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. Data pins B1 through B8 are designed to track VCCB, which accepts any supply voltage from 0.65 V to 3.6 V.

The SN74AXC8T245 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control inputs (DIR1 and DIR2). The output-enable (OE) input is used to disable the outputs so the buses are effectively isolated.

The SN74AXC8T245 device is designed so the control pins (DIR and OE) are referenced to VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs when the device is powered down. This inhibits current backflow into the device which prevents damage to the device.

The VCC isolation feature ensures that if either VCC input supply is below 100 mV, all level shifter outputs are disabled and placed into a high-impedance state.

To ensure the high-impedance state of the level shifter I/Os during power up or power down, OE should be tied to VCCA through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74AXC8T245 device is an 8-bit non-inverting bus transceiver that resolves voltage level mismatch between devices operating at the latest voltage nodes (0.7 V, 0.8 V, and 0.9 V) and devices operating at industry standard voltage nodes (1.8 V, 2.5 V, 3.3 V) and vice versa.

The device operates by using two independent power-supply rails (VCCA and VCCB) that operate as low as 0.65 V. Data pins A1 through A8 are designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. Data pins B1 through B8 are designed to track VCCB, which accepts any supply voltage from 0.65 V to 3.6 V.

The SN74AXC8T245 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control inputs (DIR1 and DIR2). The output-enable (OE) input is used to disable the outputs so the buses are effectively isolated.

The SN74AXC8T245 device is designed so the control pins (DIR and OE) are referenced to VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs when the device is powered down. This inhibits current backflow into the device which prevents damage to the device.

The VCC isolation feature ensures that if either VCC input supply is below 100 mV, all level shifter outputs are disabled and placed into a high-impedance state.

To ensure the high-impedance state of the level shifter I/Os during power up or power down, OE should be tied to VCCA through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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Technical documentation

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Type Title Date
* Data sheet SN74AXC8T245 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and Tri-State Outputs datasheet (Rev. B) 11 Jul 2018
Application note Translate Voltages for RGMII (Rev. A) 06 Aug 2021
User guide AXC Small-Package Evaluation Module User's Guide (Rev. A) 12 Jul 2021
Selection guide Voltage Translation Buying Guide (Rev. A) 15 Apr 2021
Application note Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) 29 Mar 2021
Application note Traction Inverter Motor Control Enhancement Using Logic and Translation 25 Jun 2020
Application note How to Support 1.8-V Signals Using a 3.3-V LVDS Driver/Receiver + Level-Shifter 28 Dec 2018
Application note Glitch free power sequencing with AXC level translators (Rev. A) 20 Sep 2018
Technical article Does your design have a low talker? 19 Mar 2018
User guide SN74AXC8T245 Evaluation Module 02 Aug 2017

Design & development

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

Evaluation board

14-24-LOGIC-EVM — Generic Logic EVM Supporting 14 through 24 Pin PW, DB, D, DW, NS, DYY, and DGV Packages

This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, DYY or DGV package in a 14 to 24 pin count.

In stock
Limit: 5
Evaluation board

14-24-NL-LOGIC-EVM — Generic 14 through 24 pin non-leaded package evaluation module

Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.
In stock
Limit: 10
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 (...)

In stock
Limit: 5
Evaluation board

AXC-SMALLPKG1EVM — Evaluation module for small package direction-controlled translation devices

This EVM is designed to support SN74AXC8T245 in the RJW package and SN74AXC1T45 in DEA and the DTQ packages. There is also option of populating the SN74AVC4T245 in the RSV package. It is also designed to support the bus hold and Q1 devices for the respective channel counts.

The AXC devices belong to (...)

In stock
Limit: 5
Evaluation board

SN74AXC8T245EVM — SN74AXC8T245 Evaluation Module for Direction-Controlled Bidirectional Translation Device

This EVM is designed to support SN74AXC8T245 which is an 8 channel direction-controlled translation device. There is also option of populating 1, 2, 4 channel LVC and AVC direction controlled translation device. It also supports the bus hold and Q1 devices in the same number of channels. The AXC (...)
In stock
Limit: 5
Simulation model

SN74AXC8T245 IBIS Model (Rev. C)

SCEM580C.ZIP (52 KB) - IBIS Model
Package Pins Download
TSSOP (PW) 24 View options
UQFN (RJW) 24 View options
VQFN (RHL) 24 View options

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