The SN74AXC4T245-Q1 AEC-Q100 qualified device is a four-bit non-inverting bus transceiver that uses two individually configurable power-supply rails. The device is operational with both VCCA and VCCB supplies as low as 0.65V. The A port is designed to track VCCA, which accepts any supply voltage from 0.65V to 3.6V. The B port is designed to track VCCB, which also accepts any supply voltage from 0.65V to 3.6V. Additionally the SN74AXC4T245-Q1 is compatible with a single-supply system.
The SN74AXC4T245-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 (1DIR and 2DIR). The output-enable inputs (1 OE and 2 OE) are used to disable the outputs so the buses are effectively isolated. The SN74AXC4T245-Q1 device is designed so the control pins (xDIR and x OE) are referenced to VCCA.
To put the level shifter I/Os in the high-impedance state during power up or power down, tie the x OE pins to VCCA through a pull-up resistor.
This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry is designed so that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down.
The VCC isolation feature is designed so that if either VCCA or VCCB is less than 100mV, both I/O ports enter a high-impedance state by disabling their outputs.
Glitch-Free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | SN74AXC4T245-Q1 Automotive 4-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and Tri-State Outputs datasheet (Rev. F) | PDF | HTML | 29 Jan 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 | |
| Functional safety information | SN74AXC4T245-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 09 May 2024 | |
| Application brief | Translate Voltages for UART (Rev. B) | PDF | HTML | 04 Aug 2021 | |
| Selection guide | Voltage Translation Buying Guide (Rev. A) | 15 Apr 2021 |
For additional terms or required resources, click any title below to view the detail page where available.
The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,
14-24-NL-LOGIC-EVM is a flexible evaluation module (EVM) designed to support any logic or translation device that has a 14-pin to 24-pin BQA, BQB, RGY, RSV, RJW or RHL package.
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| UQFN (RSV) | 16 | Ultra Librarian |
| WQFN (BQB) | 16 | Ultra Librarian |
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