- 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：具有三态输出的八路总线收发器和寄存器
- 点击这里打开及下载SN74HC646的技术文档资料
- TI代理渠道，提供当日发货、严格的质量标准，满足您的目标价格
The ’HC646 devices 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 the ’HC646 devices.
Output-enable (OE)\ and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port may 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 may be stored in one register and/or B data may be stored in the other register.
To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
When an output function is disabled, the input function is still enabled and can be used to store data. Only one of the two buses, A or B, may be driven at a time.
- Wide Operating Voltage Range of 2 V to 6 V
- High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads
- Low Power Consumption, 80-μA Max ICC
- Typical tpd = 11 ns
- ±6-mA Output Drive at 5 V
- Low Input Current of 1 μA Max
- Independent Registers for A and B Buses
- Multiplexed Real-Time and Stored Data
- True Data Paths
- IOL (Max) (mA)
- 7.8
- IOH (Max) (mA)
- -7.8
- Technology Family
- HC
- Rating
- Catalog
- Operating temperature range (C)
- -40 to 85
SN74HC646的完整型号有：SN74HC646DW、SN74HC646DWR，以下是这些产品的关键参数及官网采购报价：
SN74HC646DW，工作温度：-40 to 85，封装：SOIC (DW)-24，包装数量MPQ：25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SN74HC646DW的批量USD价格：.575（1000+）
SN74HC646DWR，工作温度：-40 to 85，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SN74HC646DWR的批量USD价格：.479（1000+）
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。
