CD74HCT646_TI 具有三态输出的高速 CMOS 逻辑八路总线收发器/寄存器

CD74HCT646的基本参数

制造厂商：TI
产品类别：逻辑和电压转换
技术类目：缓冲器、驱动器和收发器 - 通用收发器
功能描述：具有三态输出的高速 CMOS 逻辑八路总线收发器/寄存器
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CD74HCT646的产品详情：

The CD54HC646 and CD74HCT646 consist of bus-transceiver circuits with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with these devices.

Output-enable (OE\) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port can be stored in either or both registers.

The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE\ is active (low). In the isolation mode (OE\ high), A data can be stored in one register and/or B data can be stored in the other register.

When an output function is disabled, the input function still is enabled and can be used to store data. Only one of the two buses, A or B, can be driven at a time.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

CD74HCT646的优势和特性：

2-V to 6-V VCC Operation (CD54HC646)
4.5-V to 5.5-V VCC Operation (CD74HCT646)
Wide Operating Temperature Range of –55°C to 125°C
Balanced Propagation Delays and Transition Times
Standard Outputs Drive Up To 15 LS-TTL Loads
Significant Power Reduction Compared to LS-TTL Logic ICs
Inputs Are TTL-Voltage Compatible (CD74HCT646)
Independent Registers for A and B Buses
Multiplexed Real-Time and Stored Data
True Data Paths

CD74HCT646的参数（英文）：

IOL (Max) (mA)
6
IOH (Max) (mA)
-6
Technology Family
HCT
Rating
Catalog
Operating temperature range (C)
-55 to 125

CD74HCT646具体的完整产品型号参数及价格（美元）：

CD74HCT646的完整型号有：CD74HCT646M96，以下是这些产品的关键参数及官网采购报价：

CD74HCT646M96，工作温度：-55 to 125，封装：SOIC (DW)-24，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD74HCT646M96的批量USD价格：1.139（1000+）

CD74HCT646的评估套件：

14-24-LOGIC-EVM — 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。

CD74HCT646的电路图解：

CD74HCT646的评估套件：