SN74LVT240 http://www.xyhkjic.com/ 0755-82574204朱生

发布时间： 2015/4/21 15:01:11 | 413 次阅读

制造商：Texas Instruments
RoHS：无铅 / 符合限制有害物质指令(RoHS)规范要求
封装：管件
说明：IC INVERTER DUAL 4-INPUT 20TSSOP
标准包装：70
类别：集成电路 (IC)
家庭：逻辑 - 栅极和逆变器
系列：74LVT
包装：管件
逻辑类型：逆变器，缓冲器
电路数：2
输入数：4
特性：三态
电压 - 电源：2.7 V ~ 3.6 V
电流 - 静态（值）：5mA
电流 - 输出高，低：32mA，64mA
逻辑电平 - 低：0.8V
逻辑电平 - 高：2V
不同 V、 CL 时的传播延迟：2.6ns @ 3.3V，50pF
工作温度：-40°C ~ 85°C
安装类型：表面贴装
供应商器件封装：20-TSSOP
封装/外壳：20-TSSOP（0.173"，4.40mm 宽）

This octal buffer and line driver is designed specifically for low-voltage (3.3-V) V

operation, but with the

capability to provide a TTL interface to a 5-V system environment.

The SN74LVT240A is organized as two 4-bit buffer/line drivers with separate output-enable (OE) inputs. When

OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the

high-impedance state.

When V

is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.

However, to ensure the high-impedance state above 1.5 V, OE should be tied to V

through a pullup resistor;

the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for hot-insertion applications using I

off

and power-up 3-state. The I

off

circuitry

disables the outputs, preventing damaging current backflow through the device when it is powered down. The

power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,

which prevents driver conflict

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