WMSIC Electronic Components

74VHC540FT(BJ) 74VHC540FT

Model74VHC540FT(BJ)
PackageTSSOP20B
BrandTOSHIBA
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
TOSHIBA 74VHC540FT(BJ)
Type
TOSHIBA
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TOSHIBA
Electronic Component
74VHC540FT(BJ)
Electronic Component
1
Package
TSSOP20B
Electronic Component
Buffers / Drivers / Transceivers
Electronic Component
74VHC
Electronic Component
0.154g
Electronic Component
1
Electronic Component
1
Features
Isolated; Output; Level Conversion
Electronic Component
BM0230044313
Operating Temperature
40℃~+125℃
Operating Voltage
2V~5.5V
Output Type
Electronic Component
Type
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

74VHC540FT(BJ) 概述

一、器件简介

74VHC540FT(BJ) 是东芝(TOSHIBA)生产的一款八位反相三态缓冲/隔离驱动器,属于 74VHC 系列。单芯片包含 1 个元件、8 位通道,输出为反相并提供三态控制,可在 2.0V 至 5.5V 宽电压范围内工作,适合各类 1.8V/3.3V/5V 混合电源系统的高速逻辑隔离与总线驱动场合。

二、主要特性

  • 输出类型:三态(使能控制,可置高阻)且为反相输出
  • 工作电压:2.0V ~ 5.5V
  • 输出驱动能力:IOH = 8 mA,IOL = 8 mA(对称)
  • 静态电流:Iq ≈ 80 μA(典型,具体请参照数据手册)
  • 传播延迟:tpd = 5.2 ns(VCC = 5.0V,CL = 50 pF)
  • 工作温度:-40 ℃ ~ +125 ℃
  • 封装:TSSOP20B(TSSOP-B-20)
  • 系列:74VHC(Very High-speed CMOS),兼顾高速与低功耗

三、典型应用场景

  • 总线收发与系统级数据隔离(当多个设备共享总线时,借助三态实现独占驱动)
  • 电平转换与多电源系统内的逻辑接口缓冲
  • 存储器/外设地址、数据线驱动与信号整形
  • 高频逻辑信号驱动,需要低延迟与中等电流输出的场合

四、设计与使用建议

  • 电源去耦:在 VCC 引脚附近放置 0.1 μF 陶瓷电容以抑制瞬态干扰,必要时并联更大容量滤波电容。
  • 三态控制:确保使能脚(OE)在上电时有确定电平以避免总线争用,必要时加上上/下拉电阻。
  • 总线保护:并联串联阻抗或限流电阻可降低开关瞬态和噪声,减少电磁干扰。
  • 负载与驱动:8 mA 输出能力适用于一般 CMOS/TTL 输入驱动,但驱动大电容或多个并联输入时需注意传播延迟增长与功耗上升。
  • 温度与封装:TSSOP20B 小型化封装利于密集布局,但散热能力有限,高速/重载工作时注意PCB散热设计。

五、比较与选型提示

与传统 74HC 系列相比,74VHC 在更宽的电压范围内保持高速性能和较低静态功耗;与 AHC/ACT 等更高驱动系列相比,VHC 在功耗与速度之间更均衡,适用于对延迟和能耗有综合要求的通用驱动场景。选型时关注工作电压、输出电流需求、传输延时和封装尺寸。

六、结语

74VHC540FT(BJ) 提供稳定的八位反相三态缓冲功能,适合多种数字总线驱动与接口隔离应用。其宽电压范围、低静态电流及中高速特性使其在现代混合电压系统中具有良好兼容性。实际应用时请参照东芝正式数据手册以获得详细电气特性、引脚配置以及可靠性规范。

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