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SN74LVC2G241DCUR


双通道非反相缓冲器/驱动器,2 通道,3 态输出,1.65V-5.5V,4.1ns tpd,+/-24mA 驱动,VSSOP-8,Ioff

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制造商零件:

SN74LVC2G241DCUR

包装:

VSSOP-8(DCU),2.0 x 3.1 x 1.0 毫米

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产品类别:
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产品概览

SN74LVC2G241DCUR 是一款具有 3 态输出的双通道非反相缓冲器和线路驱动器,由 Texas Instruments 生产,属于 LVC(低压 CMOS)逻辑系列。该器件专为 1.65 V 至 5.5 V VCC 工作电压而设计,是两个独立的 1 位线路驱动器,具有独立的输出使能(1OE、2OE)控制输入,非常适合需要选择性信号路由的总线型应用。DCU 封装(VSSOP-8)仅占 2.0 x 3.1 毫米的电路板空间,实现了高密度 PCB 布局。主要亮点包括:3.3 V 时最大传播延迟 4.1 ns、3.3 V 时 ±24 mA 平衡输出驱动、最高 5.5 V 的过压容限输入以及支持实时插入和部分掉电操作的 Ioff 电路。该器件还可用作向下转换器,将高达 5.5 V 的输入逻辑电平向下转换为 VCC 轨电压。.

主要规格

逻辑家族 LVC(低电压 CMOS)
通道数 2
配置 2 x 1 位非反相缓冲器/驱动器
电源电压范围 (VCC) 1.65 V 至 5.5 V
输入电压范围 0 V 至 5.5 V(耐过压)
传播延迟(tpd,最大值) 4.1 毫微秒,电压 3.3 V
输出驱动电流(IOH/IOL,3.3 V 时) ±24 毫安
输出驱动电流(IOH/IOL,4.5 V 时) ±32 mA
静态电源电流(ICC,最大值) 10 µA
输出类型 3 州
输入类型 标准 CMOS
极性 非逆变式
输出启用有效电平 1OE: 低电平有效;2OE: 高电平有效
IOH = -24 mA 时的 VOH,3.3 V 2.4 V(最小值)
IOL = 24 mA、3.3 V 时的 VOL 0.4 V(最大值)
输出接地反弹(VOLP,典型值) < VCC = 3.3 V 时为 0.8 V
输出 VOH 欠压(VOHV,典型值) VCC = 3.3 V 时 > 2 V
Ioff 支持 是(实时插入/部分断电)
闩锁性能 > 100 mA(符合 JESD 78 标准,II 级
ESD 保护(HBM) 2000 V (JESD 22, A114-A)
ESD 保护(CDM) 1000 V(JESD 22,C101)
包装 VSSOP-8(DCU),2.0 x 3.1 毫米
工作温度范围 -40至+125摄氏度
RoHS / REACH 符合要求
MSL 等级 Level-1-260C-UNLIM

特点

  • 双通道非反相缓冲器/线路驱动器,具有独立的三态输出启用控制(1OE 低电平有效、2OE 高电平有效)
  • 宽电源电压范围:1.65 V 至 5.5 V,支持混合电压系统设计
  • 过压容限输入可接受高达 5.5 V 的信号,与 VCC 无关
  • 3.3 V 电压下的最大传播延迟仅为 4.1 ns,可实现高速信号缓冲
  • 3.3 V 下的平衡 ±24-mA 输出驱动;4.5 V 下的 ±32-mA 输出驱动
  • 超低静态电流:最大 10µA ICC,适用于功耗敏感型应用
  • 关断电路支持带电插拔、部分掉电模式和反向驱动保护
  • 下变频功能:将最高 5.5 V 的输入转换为 VCC 电平
  • 3.3 V 时,典型输出接地反弹 (VOLP) 2 V
  • 闩锁抗扰度超过 100 mA(符合 JESD 78 标准 II 级要求
  • 采用 Texas Instruments NanoFree 封装技术,占用空间最小

应用

  • AV 接收器和家庭影院系统
  • 蓝光和 DVD 播放器/刻录机
  • 台式电脑和笔记本电脑
  • 便携式媒体播放器和移动互联网设备
  • GPS 个人导航设备
  • 嵌入式 PC 和数码摄像机
  • 专业音频混音器和网络投影仪前端
  • 内存地址驱动器、时钟驱动器和面向总线的接收器/发送器

SN74LVC2G241DCUR 是一款具有 3 态输出的双通道非反相缓冲器和线路驱动器,由 Texas Instruments 制造,属于 74LVC 逻辑系列。该器件设计工作电压为 1.65 V 至 5.5 V,专门用于提高三态存储器地址驱动器、时钟驱动器以及面向总线的接收器和发射器的性能和密度。该器件由两个独立的 1 位线路驱动器组成,每个驱动器都有自己的输出使能控制:1OE 输入为低电平有效,2OE 输入为高电平有效。当满足输出启用条件时,数据从 A 输入传递到 Y 输出;当禁用时,输出进入高阻抗(3 态)状态,允许多个器件安全共享总线。该器件的一个主要优势是其过压容限输入结构,无论 VCC 电源电平如何,它都能接受高达 5.5 V 的信号。这使得 SN74LVC2G241DCUR 能够发挥降压转换器的功能,将较高电压逻辑电平转换为 VCC 轨电压--这在 3.3 V 或 5 V 总线必须与较低电压控制器接口的混合电压系统中是一项宝贵的功能。集成的 Ioff 电路可确保在上电或断电期间禁用输出,防止出现破坏性的回流电流,并支持带电插拔和部分断电应用。该器件采用紧凑型 VSSOP-8 (DCU) 封装,尺寸仅为 2.0 x 3.1 mm,最大限度地减少了电路板面积,同时在 3.3 V 电压下提供稳定的 ±24 mA 输出驱动,传播延迟仅为 4.1 ns。.

SN74LVC2G241DCUR 通过三个功能子系统运行:

1.非反相缓冲器核心:两个通道中的每个通道都包含一个 CMOS 非反相缓冲器级。当相应的输出启用引脚处于有效状态时(1OE = 低电平,用于通道 1;2OE = 高电平,用于通道 2),缓冲器将 A 输入端的逻辑电平直接传递到 Y 输出端,而不进行反相。CMOS 推挽输出级提供对称的源 (IOH) 和灌 (IOL) 电流能力(3.3 V 时高达 ±24 mA),确保即使在长 PCB 线路或多负载情况下也能提供强大的信号驱动。平衡输出结构最大限度地减少了时钟分配应用中的占空比失真。.

2.三态输出启用控制:每个通道都有一个独立的输出使能输入。当未满足使能条件(1OE = 高电平或 2OE = 低电平)时,输出晶体管同时关闭,Y 输出处于高阻抗(Hi-Z)状态。这样,多个设备就可以共享一条公共总线,而不会发生争用。在上电或断电瞬态期间,Ioff 电路可确保输出保持在 Hi-Z,防止反向驱动电流流过器件,保护下游元件。设计人员应通过一个上拉电阻将 1OE 与 VCC 连接,通过一个下拉电阻将 2OE 与 GND 连接,以确保在电源转换期间保持 Hi-Z 状态。.

3.过压耐受输入和下变频:输入级可接受高达 5.5 V 的电压,与 VCC 电源无关。当 VCC 设置为较低电压(如 1.8 V 或 2.5 V),而输入信号来自较高电压域(如 3.3 V 或 5 V)时,器件会将输入箝位和电平转换为输出端的 VCC 逻辑电平。这种向下转换功能使混合电压系统设计不再需要外部电平转换器集成电路。输入箝位二极管还为高达 -50 mA (IIK) 的负欠压提供了一个确定的路径,从而保护了薄氧化物 CMOS 栅极免受损坏。.

针脚编号. 名称 类型 功能
1 1OE 输入(低电平有效) 通道 1 的输出使能。当 1OE 为低电平时,1Y 输出跟随 1A 输入。1OE 为高电平时,1Y 输出处于高阻抗(3 态)状态。.
2 1A 输入 通道 1 的数据输入。可承受过压,可接受高达 5.5 V 的信号,与 VCC 无关。当 1OE 激活时,非反相逻辑电平显示为 1Y。.
3 2Y 输出(3 态) 通道 2 的数据输出。当 2OE 为高电平时,跟随 2A 输入。2OE 低电平时进入高阻抗状态。在 3.3 V 电压下,可输出/输入高达 ±24 mA 的电流。.
4 接地 电源 接地参考。必须连接至 PCB 地平面,以确保设备正常运行和热管理。.
5 2A 输入 通道 2 的数据输入。可承受过压,可接受高达 5.5 V 的信号,与 VCC 无关。当 2OE 激活时,非反相逻辑电平显示为 2Y。.
6 2OE 输入(高电平有效) 通道 2 的输出使能。当 2OE 为高电平时,2Y 输出跟随 2A 输入。当 2OE 为低电平时,2Y 输出处于高阻抗(3 态)状态。.
7 1Y 输出(3 态) 通道 1 的数据输出。当 1OE 为低电平时,跟随 1A 输入。1OE 为高电平时进入高阻抗状态。在 3.3 V 电压下,可输出/输入高达 ±24 mA 的电流。.
8 VCC 电源 正电源电压。工作电压范围1.65 V 至 5.5 V。去耦电容(典型值为 0.1 µF)应靠近该引脚。.
  • AV 接收器和家庭影院系统:通过 3 态总线共享,在 DSP 和 HDMI/SPDIF 接口之间缓冲音频/视频控制信号
  • 台式机和笔记本电脑:以低传播延迟和高驱动强度驱动内存地址线和时钟分配网络
  • 便携式媒体播放器和移动互联网设备利用向下转换功能,在 1.8 V/2.5 V 处理器和 3.3 V 外围设备之间实现信号平移
  • GPS 个人导航设备:缓冲 GPS 模块与主机处理器之间的通信总线信号,功耗最低(10 µA ICC)
  • 嵌入式 PC 和工业系统:提供总线隔离和信号缓冲功能,支持热插拔模块的 Ioff 实时插入功能
制造商 部件编号 渠道 包装 主要说明
德州仪器 sn74lvc2g241dctr 2 SSOP-8(DCT),2.95 x 4 毫米 功能相同,封装选项不同(SSOP)
德州仪器 SN74LVC2G241YZPR 2 DSBGA-8(YZP),2.25 x 1.25 毫米 适用于超小型设计的芯片级封装
Nexperia 74LVC2G241GW,125 2 TSSOP-8 (SOT353) 来自 Nexperia 的引脚兼容替代品
onsemi MC74LVC2G241DTG 2 TSOP-8 来自 onsemi 的等效功能,规格相似
二极管公司 74LVC2G241DW-7 2 SOT-363 (SC-88) 紧凑型替代产品,工作电压为 1.65 V 至 5.5 V
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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

Online Inquiry Form

Support Excel, PDF, CSV format files for full BOM list quotation

Submit your component procurement and custom packaging needs via the form below. We will provide a detailed quotation and professional solution within 1–8 working hours.