SN74LV244AT_TI 具有 TTL 兼容型 CMOS 输入和三态输出的 8 通道、4.5V 至 5.5V 缓冲器

SN74LV244AT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 - 同相缓冲器和驱动器
功能描述：具有 TTL 兼容型 CMOS 输入和三态输出的 8 通道、4.5V 至 5.5V 缓冲器
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SN74LV244AT的产品详情：

This octal buffer/driver is designed specifically to improve both the performance and density of 3-state memory-address drivers, clock drivers, and bus-oriented receivers and transmitters.

The SN74LV244AT is organized as two 4-bit buffers/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.

To ensure the high-impedance state during power up or power down, OE shall 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.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

SN74LV244AT的优势和特性：

Inputs Are TTL-Voltage Compatible
4.5-V to 5.5-V VCC Operation
Typical tpd = 5.4 ns at 5 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 5 V, TA = 25°C
Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 5 V, TA = 25°C
Supports Mixed-Mode Voltage Operation on All Ports
Ioff Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 250 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

SN74LV244AT的参数（英文）：

Technology Family
LV-AT
Supply voltage (Min) (V)
4.5
Supply voltage (Max) (V)
5.5
Number of channels (#)
8
IOL (Max) (mA)
16
ICC (Max) (uA)
20
IOH (Max) (mA)
-16
Input type
TTL-Compatible CMOS
Output type
3-State
Features
Balanced outputs, Very high speed (tpd 5-10ns), Partial power down (Ioff), Over-voltage tolerant inputs
Rating
Catalog

SN74LV244AT具体的完整产品型号参数及价格（美元）：

SN74LV244AT的完整型号有：SN74LV244ATDWR、SN74LV244ATNSR、SN74LV244ATPW、SN74LV244ATPWR、SN74LV244ATRGYR，以下是这些产品的关键参数及官网采购报价：

SN74LV244ATDWR，工作温度：-40 to 85，封装：SOIC (DW)-20，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SN74LV244ATDWR的批量USD价格：.184（1000+）

SN74LV244ATNSR，工作温度：-40 to 85，封装：SO (NS)-20，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SN74LV244ATNSR的批量USD价格：.202（1000+）

SN74LV244ATPW，工作温度：-40 to 85，封装：TSSOP (PW)-20，包装数量MPQ：70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SN74LV244ATPW的批量USD价格：.384（1000+）

SN74LV244ATPWR，工作温度：-40 to 85，封装：TSSOP (PW)-20，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SN74LV244ATPWR的批量USD价格：.184（1000+）

SN74LV244ATRGYR，工作温度：-40 to 85，封装：VQFN (RGY)-20，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网SN74LV244ATRGYR的批量USD价格：.193（1000+）

SN74LV244AT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。

14-24-NL-LOGIC-EVM — Generic 14 through 24 pin non-leaded package evaluation module

Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.

SN74LV244AT的电路图解：

SN74LV244AT的评估套件：