SN74LVC2T45-Q1
-
AEC-Q100 qualified for automotive applications
- Fully configurable dual-rail design allows each port to operate over the full 1.65V to 5.5V power-supply range
- VCC isolation feature – if either VCC input is at GND, both ports are in the high-impedance state
- DIR input circuit referenced to VCCA
- Low power consumption, 10µA maximum ICC
- ±24mA output drive at 3.3V
- Ioff supports Partial-Power-Down mode operation
- Maximum data rates:
- 420Mbps (3.3V to 5V translation)
- 210Mbps (translate to 3.3V)
- 140Mbps (translate to 2.5V)
- 75Mbps (translate to 1.8V)
This dual-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65V to 5.5V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V, and 5V voltage nodes.
The SN74LVC2T45-Q1 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports are always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
The SN74LVC2T45-Q1 is designed so that VCCA supplies the DIR input circuit. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature is designed so that if either VCC input is at GND, both ports are in the high-impedance state.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | SN74LVC2T45-Q1 Automotive Dual-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation datasheet (Rev. C) | PDF | HTML | 2024/7/22 | ||
| 應用說明 | Schematic Checklist - A Guide to Designing With Fixed or Direction Control Translators | PDF | HTML | 2024/10/2 | |||
| 應用說明 | Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators | PDF | HTML | 2024/7/12 | |||
| 應用說明 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024/7/3 | |||
| 選擇指南 | Voltage Translation Buying Guide (Rev. A) | 2021/4/15 | ||||
| 更多文件說明 | Automotive Logic Devices Brochure | 2014/8/27 |
設計與開發
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5-8-LOGIC-EVM — 適用於 5 針腳至 8 針腳 DCK、DCT、DCU、DRL 和 DBV 封裝的通用邏輯評估模組
AVCLVCDIRCNTRL-EVM — 適用於方向控制雙向轉換裝置、支援 AVC 和 LVC 的通用 EVM
通用 EVM 的設計可支援一、二、四、八通道 LVC 及 AVC 方向控制的轉換裝置。此外也支援相同通道數量的匯流排保留與汽車 -Q1 裝置。AVC 是低電壓轉換裝置，具較低驅動強度 12mA。LVC 是較高的電壓轉換裝置，範圍從 1.65 到 5.5V 且具較高驅動強度 32mA。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DCU) | 8 | Ultra Librarian |