Automotive 8-bit dual-supply bus transceiver w/ configurable voltage translation, 3-state output
Product details
Parameters
Package | Pins | Size
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
All trademarks are the property of their respective owners.
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.
Same functionality and pinout but is not an equivalent to the compared device:
Technical documentation
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 guide | Voltage translation buying guide | Jun. 13, 2019 | |
Application note | Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. A) | Apr. 02, 2019 | |
Application note | 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
Description
Features
- Board design allows for versatility in evaluation
- Supports a wide-range of logic devices
Description
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
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
Description
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
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 24 | View options |
VQFN (RHL) | 24 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.