SN74LVT244B_TI 具有 TTL 兼容型 CMOS 输入和三态输出的 8 通道、2.7V 至 3.6V 缓冲器

SN74LVT244B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、2.7V 至 3.6V 缓冲器
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SN74LVT244B的产品详情：

This octal buffer and line driver is designed specifically for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The SN74LVT244B is organized as two 4-bit 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\ 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.

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.

SN74LVT244B的优势和特性：

Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
Supports Unregulated Battery Operation Down to 2.7 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
Ioff and Power-Up 3-State Support Hot Insertion
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

SN74LVT244B的参数（英文）：

Technology Family
LVT
Supply voltage (Min) (V)
2.7
Supply voltage (Max) (V)
3.6
Number of channels (#)
8
IOL (Max) (mA)
64
ICC (Max) (uA)
5000
IOH (Max) (mA)
-32
Input type
TTL-Compatible CMOS
Output type
3-State
Features
Ultra high speed (tpd <5ns), Partial power down (Ioff), Over-voltage tolerant inputs, Power up 3-state
Rating
Catalog

SN74LVT244B具体的完整产品型号参数及价格（美元）：

SN74LVT244B的完整型号有：SN74LVT244BDBR、SN74LVT244BDW、SN74LVT244BDWR、SN74LVT244BNSR、SN74LVT244BPW、SN74LVT244BPWR、SN74LVT244BRGYR，以下是这些产品的关键参数及官网采购报价：

SN74LVT244BDBR，工作温度：-40 to 85，封装：SSOP (DB)-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SN74LVT244BDBR的批量USD价格：.288（1000+）

SN74LVT244BDW，工作温度：-40 to 85，封装：SOIC (DW)-20，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SN74LVT244BDW的批量USD价格：.314（1000+）

SN74LVT244BDWR，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SN74LVT244BDWR的批量USD价格：.262（1000+）

SN74LVT244BNSR，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SN74LVT244BNSR的批量USD价格：.288（1000+）

SN74LVT244BPW，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SN74LVT244BPW的批量USD价格：.314（1000+）

SN74LVT244BPWR，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SN74LVT244BPWR的批量USD价格：.262（1000+）

SN74LVT244BRGYR，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SN74LVT244BRGYR的批量USD价格：.275（1000+）

SN74LVT244B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.

SN74LVT244B的电路图解：

SN74LVT244B的评估套件：