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.

• 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)

• Technology Family
• LVC
• Supply voltage (Min) (V)
• 2
• 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), Over-voltage tolerant inputs, Bus-hold
• Rating
• Military

SN54LVCH244A的完整型号有：5962-9754201Q2A、5962-9754201QRA、5962-9754201QSA、SNJ54LVCH244AFK、SNJ54LVCH244AJ、SNJ54LVCH244AW，以下是这些产品的关键参数及官网采购报价：

5962-9754201Q2A，工作温度：-55 to 125，封装：LCCC (FK)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9754201Q2A的批量USD价格：19.69（1000+）

5962-9754201QRA，工作温度：-55 to 125，封装：CDIP (J)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9754201QRA的批量USD价格：16.532（1000+）

5962-9754201QSA，工作温度：-55 to 125，封装：CFP (W)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9754201QSA的批量USD价格：23.002（1000+）

SNJ54LVCH244AFK，工作温度：-55 to 125，封装：LCCC (FK)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54LVCH244AFK的批量USD价格：19.69（1000+）

SNJ54LVCH244AJ，工作温度：-55 to 125，封装：CDIP (J)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54LVCH244AJ的批量USD价格：16.532（1000+）

SNJ54LVCH244AW，工作温度：-55 to 125，封装：CFP (W)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54LVCH244AW的批量USD价格：23.002（1000+）