The SN74AXC4T245 is a four-bit noninverting 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 is compatible with a single-supply system.
The SN74AXC4T245 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 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 xOE pins to VCCA through a pullup resistor.
This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures 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 design of the VCC isolation feature allows both I/O ports to enter a high-impedance state by disabling their outputs if either VCCA or VCCB is less than 100mV.
Glitch-Free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | SN74AXC4T245 Four-Bit Bus Transceiver with Configurable Voltage Translation and Tri-State Outputs datasheet (Rev. B) | PDF | HTML | 11 Apr 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 | |
| Application brief | Future-Proofing Your Level Shifter Design with TI's Dual Footprint Packages | PDF | HTML | 05 Sep 2023 | |
| Application brief | Translate Voltages for UART (Rev. B) | PDF | HTML | 04 Aug 2021 | |
| Selection guide | Voltage Translation Buying Guide (Rev. A) | 15 Apr 2021 | ||
| Application note | 2N7001T Voltage Level Translator for SPI, UART, JTAG Interface (Rev. A) | PDF | HTML | 29 Mär 2021 | |
| Application note | Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) | PDF | HTML | 29 Mär 2021 | |
| Application note | Glitch free power sequencing with AXC level translators (Rev. A) | 20 Sep 2018 |
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Das 14-24-LOGIC-EVM-Evaluierungsmodul (EVM) ist für die Unterstützung aller Logikgeräte konzipiert, die sich in einem 14-Pin- bis 24-Pin-D-, DW-, DB-, NS-, PW-, DYY- oder DGV-Gehäuse befinden.
14-24-NL-LOGIC-EVM ist ein flexibles Evaluierungsmodul (EVM), das alle Logik- oder Übersetzungsbausteine mit einem 14- bis 24-poligen BQA-, BQB-, RGY-, RSV-, RJW- oder RHL-Gehäuse unterstützt.
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 (...)
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| UQFN (RSV) | 16 | Ultra Librarian |
| WQFN (BQB) | 16 | Ultra Librarian |
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