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邏輯和電壓轉換
電壓轉換器及電平移位器
電壓轉換器

SN74AXC8T245

現行

8 位元雙電源匯流排收發器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
TXV0108-Q1 現行 車用雙電源方向控制八通道電壓轉換器 Improved timing specs such as rise/fall time, skew, and propagation delay.
功能相似於所比較的產品。
TXV0106-Q1 現行 車用雙電源定向六通道電壓轉換器 6 channel device with improved timing specs such as rise/fall time, skew, and propagation delay.

SN74AXC8T245

現行
立即訂購

產品詳細資料

Bits (#) 8 Data rate (max) (Mbps) 380 Topology Push-Pull Direction control (typ) Direction-controlled Vin (min) (V) 0.65 Vin (max) (V) 3.6 Vout (min) (V) 0.65 Vout (max) (V) 3.6 Applications RGMII Features Output enable, Partial power down (Ioff), Vcc isolation, Wettable flanks package Prop delay (ns) 8 Technology family AXC Supply current (max) (mA) 0.06 Rating Catalog Operating temperature range (°C) -40 to 125
Bits (#) 8 Data rate (max) (Mbps) 380 Topology Push-Pull Direction control (typ) Direction-controlled Vin (min) (V) 0.65 Vin (max) (V) 3.6 Vout (min) (V) 0.65 Vout (max) (V) 3.6 Applications RGMII Features Output enable, Partial power down (Ioff), Vcc isolation, Wettable flanks package Prop delay (ns) 8 Technology family AXC Supply current (max) (mA) 0.06 Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RHL) 24 19.25 mm² (5.5 mm × 3.5 mm) TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm) UQFN (RJW) 24 8 mm² (4 mm × 2 mm)
  • Qualified fully configurable dual-rail design allows each port to operate with a power supply range from 0.65V to 3.6V
  • Operating temperature from –40°C to +125°C
  • Multiple direction-control pins to allow simultaneous up and down translation
  • Up to 380Mbps support when translating from 1.8V to 3.3V
  • VCC isolation feature to effectively Isolate both buses in a power-down scenario
  • Partial power-down mode to limit backflow current in a power-down scenario
  • Compatible with SN74AVC8T245 and 74AVC8T245 level shifters
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 8000-V human-body model
    • 1000-V charged-device model
  • Qualified fully configurable dual-rail design allows each port to operate with a power supply range from 0.65V to 3.6V
  • Operating temperature from –40°C to +125°C
  • Multiple direction-control pins to allow simultaneous up and down translation
  • Up to 380Mbps support when translating from 1.8V to 3.3V
  • VCC isolation feature to effectively Isolate both buses in a power-down scenario
  • Partial power-down mode to limit backflow current in a power-down scenario
  • Compatible with SN74AVC8T245 and 74AVC8T245 level shifters
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 8000-V human-body model
    • 1000-V charged-device model

The SN74AXC8T245 device is an 8-bit non-inverting bus transceiver that resolves voltage level mismatch between devices operating at the latest voltage nodes (0.7V, 0.8V, and 0.9V) and devices operating at industry standard voltage nodes (1.8V, 2.5V, and 3.3V) and vice versa.

The device operates by using two independent power-supply rails (VCCA and VCCB) that operate as low as 0.65V. Data pins A1 through A8 are designed to track VCCA, which accepts any supply voltage from 0.65V to 3.6V. Data pins B1 through B8 are designed to track VCCB, which accepts any supply voltage from 0.65V to 3.6V.

The SN74AXC8T245 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 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 is designed so that if either VCC input supply is below 100mV, all level shifter outputs are disabled and placed into a high-impedance state.

To put the level shifter I/Os in the high-impedance state during power up or power down, tie OE to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

The SN74AXC8T245 device is an 8-bit non-inverting bus transceiver that resolves voltage level mismatch between devices operating at the latest voltage nodes (0.7V, 0.8V, and 0.9V) and devices operating at industry standard voltage nodes (1.8V, 2.5V, and 3.3V) and vice versa.

The device operates by using two independent power-supply rails (VCCA and VCCB) that operate as low as 0.65V. Data pins A1 through A8 are designed to track VCCA, which accepts any supply voltage from 0.65V to 3.6V. Data pins B1 through B8 are designed to track VCCB, which accepts any supply voltage from 0.65V to 3.6V.

The SN74AXC8T245 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 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 is designed so that if either VCC input supply is below 100mV, all level shifter outputs are disabled and placed into a high-impedance state.

To put the level shifter I/Os in the high-impedance state during power up or power down, tie OE to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.
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SN74AVC24T245 現行 具有可配置電壓轉換和 3 態輸出的 24 位元雙電源供電匯流排收發器 Similar function in 24-channel version
SN74AVC32T245 現行 具有可配置電壓轉換和 3 態輸出的 32 位元雙電源供電匯流排收發器 Similar function in 32-channel version

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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 SN74AXC8T245 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and Tri-State Outputs datasheet (Rev. C) PDF | HTML 2024/1/30
Application brief Enabling AI Accelerators with Voltage Level Translation and Analog Multiplexing (Rev. A) PDF | HTML 2025/9/29
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
應用說明 Overcoming Design Challenges - Implementing High Performance Interfaces PDF | HTML 2023/12/12
Application brief Future-Proofing Your Level Shifter Design with TI's Dual Footprint Packages PDF | HTML 2023/9/5
Application brief Voltage Level Translation Use Cases for Smart Meters PDF | HTML 2023/1/31
Application brief Translate Voltages for RGMII (Rev. A) PDF | HTML 2021/8/6
選擇指南 Voltage Translation Buying Guide (Rev. A) 2021/4/15
應用說明 Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) PDF | HTML 2021/3/29
應用說明 Traction Inverter Motor Control Enhancement Using Logic and Translation 2020/6/25
Application brief How to Support 1.8-V Signals Using a 3.3-V LVDS Driver/Receiver + Level-Shifter 2018/12/28
應用說明 Glitch free power sequencing with AXC level translators (Rev. A) 2018/9/20

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SN74AXC8T245EVM — 適用於方向控制雙向轉換裝置的 SN74AXC8T245 評估模組

此 EVM 旨在支援 SN74AXC8T245 8 通道方向控制轉換裝置。也可選擇填充 1、2、4 通道 LVC 和 AVC 方向控制轉換裝置。此外也支援相同通道數量的匯流排保留與 Q1 裝置。AXC 裝置是 0.65V 至 3.6V 的低電壓轉換裝置，驅動強度為 12mA。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。
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TXV0106-EVM — TXV0106 評估模組

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TXV0108-EVM — TXV0108 評估模組

TXV0108 評估模組 (EVM) 是一個易於使用的平台，用於評估 TXV0108 產品的功能與性能。此 EVM 具有選用電路和跨接器，可針對不同應用來配置產品。此產品提供固定與方向控制低偏斜、低抖動電壓轉換的選項。輸出可透過專屬的輸出啟用 (OE) 控制功能來啟用及停用。
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模擬型號

SN74AXC8T245 IBIS Model (Rev. D)

SCEM580D.ZIP (84 KB) - IBIS 模型
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