CD74HC245

CD74HC245图片1
CD74HC245图片2
CD74HC245概述

具有三态输出的高速 CMOS 逻辑同向八路总线收发器

The CD54HC245, CD54HCT245, and , CD74HCT245 are high-speed octal three-state bidirectional transceivers intended for two-way asynchronous communication between data buses. They have high drive current outputs which enable high-speed operation while driving large bus capacitances. They provide the low power consumption of standard CMOS circuits with speeds and drive capabilities comparable to that of LSTTL circuits.

The CD54HC245, CD54HCT245, CD74HC245 and CD74HCT245 allow data transmission of the B bus or from the B bus to the A bus. The logic level at the direction input DIR determines the direction. The output enable input OE\\, when high, puts the I/O ports in the high-impedance state.

The HC/HCT245 is similar in operation to the HC/HCT640 and the HC/HCT643.

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Buffered Inputs
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Three-State Outputs
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Bus Line Driving Capability
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Typical Propagation Delay A to B, B to A 9ns at VCC = 5V, CL = 15pF, TA = 25°C
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Fanout Over Temperature Range
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Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
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Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
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Wide Operating Temperature Range . . . -55°C to 125°C
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Balanced Propagation Delay and Transition Times
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Significant Power Reduction Compared to LSTTL Logic ICs
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HC Types
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2V to 6V Operation
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High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
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HCT Types
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4.5V to 5.5V Operation
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Direct LSTTL Input Logic Compatibility, VIL = 0.8V Max, VIH = 2V Min
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CMOS Input Compatibility, Il ≤ 1µA at VOL , VOH
CD74HC245中文资料参数规格
技术参数

位数 8

封装参数

安装方式 Surface Mount

引脚数 20

封装 SOP

外形尺寸

长度 12.8 mm

宽度 7.5 mm

封装 SOP

其他

产品生命周期 正在供货

符合标准

RoHS标准 RoHS Compliant

含铅标准 Lead Free

数据手册

在线购买CD74HC245
型号: CD74HC245
制造商: TI 德州仪器
描述:具有三态输出的高速 CMOS 逻辑同向八路总线收发器
替代型号CD74HC245
型号/品牌 代替类型 替代型号对比

CD74HC245

TI 德州仪器

当前型号

当前型号

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