SN74LVCH244A_TI 具有总线保持和三态输出的 8 通道、1.65V 至 3.6V 缓冲器

SN74LVCH244A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：具有总线保持和三态输出的 8 通道、1.65V 至 3.6V 缓冲器
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SN74LVCH244A的产品详情：

The SN54LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V V_CC operation, and the SN74LVCH244A octal buffer/line driver is designed for 1.65-V to 3.6-V V_CC operation.

These devices are organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low, these devices pass data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

These devices are fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.

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.

SN74LVCH244A的优势和特性：

Operate From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 5.9 ns at 3.3 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C
Support Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC)
Ioff Supports Partial-Power-Down Mode Operation
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
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)

SN74LVCH244A的参数（英文）：

Technology Family
LVC
Supply voltage (Min) (V)
1.65
Supply voltage (Max) (V)
3.6
Number of channels (#)
8
IOL (Max) (mA)
24
ICC (Max) (uA)
10
IOH (Max) (mA)
-24
Input type
Standard CMOS
Output type
3-State
Features
Balanced outputs, Very high speed (tpd 5-10ns), Bus-hold
Rating
Catalog

SN74LVCH244A具体的完整产品型号参数及价格（美元）：

SN74LVCH244A的完整型号有：SN74LVCH244ADBQR、SN74LVCH244ADBR、SN74LVCH244ADGVR、SN74LVCH244ADW、SN74LVCH244ADWR、SN74LVCH244ANSR、SN74LVCH244APW、SN74LVCH244APWR、SN74LVCH244APWT、SN74LVCH244ARGYR，以下是这些产品的关键参数及官网采购报价：

SN74LVCH244ADBQR，工作温度：-40 to 85，封装：SSOP (DBQ)-20，包装数量MPQ：2500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SN74LVCH244ADBQR的批量USD价格：.15（1000+）

SN74LVCH244ADBR，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SN74LVCH244ADBR的批量USD价格：.138（1000+）

SN74LVCH244ADGVR，工作温度：-40 to 85，封装：TVSOP (DGV)-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SN74LVCH244ADGVR的批量USD价格：.138（1000+）

SN74LVCH244ADW，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SN74LVCH244ADW的批量USD价格：.325（1000+）

SN74LVCH244ADWR，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SN74LVCH244ADWR的批量USD价格：.264（1000+）

SN74LVCH244ANSR，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SN74LVCH244ANSR的批量USD价格：.138（1000+）

SN74LVCH244APW，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SN74LVCH244APW的批量USD价格：.325（1000+）

SN74LVCH244APWR，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SN74LVCH244APWR的批量USD价格：.132（1000+）

SN74LVCH244APWT，工作温度：-40 to 85，封装：TSSOP (PW)-20，包装数量MPQ：250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SN74LVCH244APWT的批量USD价格：.325（1000+）

SN74LVCH244ARGYR，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SN74LVCH244ARGYR的批量USD价格：.131（1000+）

SN74LVCH244A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.

SN74LVCH244A的电路图解：

SN74LVCH244A的评估套件：