SN74ALS990DWR 供应商
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SN74ALS990DWR
品牌：TI 封装/批号：原厂原装/22+
SN74ALS990DWR 属性参数
- 标准包装：2,000
- 类别：集成电路 (IC)
- 家庭：逻辑 - 锁销
- 系列：74ALS
- 逻辑类型：D 型透明锁存器
- 电路：8:8
- 输出类型：三态
- 电源电压：4.5 V ~ 5.5 V
- 独立电路：1
- 延迟时间 - 传输：6ns
- 输出电流高，低：400µA, 8mA
- 工作温度：0°C ~ 70°C
- 安装类型：表面贴装
- 封装/外壳：20-SOIC（0.295"，7.50mm 宽）
- 供应商设备封装：20-SOIC
- 包装：带卷 (TR)
产品特性
- 3-State I/O-Type Read-Back Inputs
- Bus-Structured Pinout
- True Logic Outputs
- Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
产品概述
This 8-bit latch is designed specifically for storing the contents
of the input data bus and providing the capability of reading back
the stored data onto the input data bus.The eight latches are transparent D-type latches. While the
latch-enable (LE) input is high, the Q outputs follow the data (D)
inputs.Read back is provided through the output-enable () input. When is taken low, the data present at
the output of the data latches is allowed to pass back onto the input
data bus. When is taken high,
the output of the data latches is isolated from the D inputs. does not affect the internal
operation of the latches; however, precautions should be taken not to
create a bus conflict.The SN74ALS990 is characterized for operation from 0°C to
70°C.