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Automotive 8-bit dual-supply bus transceiver w/ configurable voltage translation, 3-state output

SN74AXC8T245-Q1

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Product details

Parameters

Technology Family AXC Applications RGMII Bits (#) 8 High input voltage (Min) (Vih) 0.455 High input voltage (Max) (Vih) 3.6 Output voltage (Min) (V) 0.65 Output voltage (Max) (V) 3.6 IOH (Max) (mA) -12 IOL (Max) (mA) 12 Rating Automotive open-in-new Find other Direction-controlled voltage translators

Package | Pins | Size

TSSOP (PW) 24 34 mm² 7.7 x 4.4 VQFN (RHL) 24 19 mm² 5.5 x 3.5 open-in-new Find other Direction-controlled voltage translators

Features

  • AEC-Q100 Qualified for automotive applications
  • 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 bses in a power-down scenario
  • Partial power-down mode to limit backflow current in a power-Down scenario
  • Compatible with SN74AVC8T245-Q1 level shifter
  • Latch-up performance exceeds 100 mA per JESD 78, Class II

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Description

The SN74AXC8T245-Q1 AEC-Q100 qualified 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-Q1 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-Q1 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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet SN74AXC8T245-Q1 Automotive 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and Tri-State Outputs datasheet (Rev. A) Jul. 15, 2019
Selection guides Voltage translation buying guide Jun. 13, 2019
Application notes Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. A) Apr. 02, 2019
Application notes Glitch free power sequencing with AXC level translators (Rev. A) Sep. 20, 2018

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
10
Description
This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, P, N, or DGV package in a 14 to 24 pin count.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic devices
EVALUATION BOARDS Download
document-generic User guide
20
Description
Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic and translation devices with included dual supply support
  • Board has 9 sections that can be broken apart for a smaller form factor
EVALUATION BOARDS Download
document-generic User guide
20
Description

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 is (...)

Features
  • SMB connector available for high speed operation
  • Ground port available on each header pin to maintain signal integrity
  • DIR and OE have 10K ohm pull up /pull down resistor options
  • Designed to support up to 20 different devices
EVALUATION BOARDS Download
document-generic User guide
20
Description
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 (...)
Features
  • High speed SMB connector available
  • Gnd port for each header pin supports high speed measurement
  • DIR and OE pin have 10K ohm pulldown built in
  • Layout optimized for high speed connectivity
  • Device supports 2 DIR pins each controlling  4 channel bank

Design tools & simulation

SIMULATION MODELS Download
SCEM580C.ZIP (52 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 24 View options
VQFN (RHL) 24 View options

Ordering & quality

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