SN74AHC244DWR

These octal buffers/drivers are designed specifically to improve the performance and density of 3-state memory-address drivers, clock drivers, and bus-oriented receivers and transmitters. The 'AHC244 devices are 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 should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Applications

• Three-state memory address drivers
• Clock drivers
• Bus-oriented receivers and transmitters

Key features

• Operating supply voltage range: 2V~5.5V
• Latch-up performance exceeds 250mA, compliant with JESD 17
• Absolute maximum ratings: supply voltage range -0.5V~7V, input voltage range -0.5V~7V, output voltage range -0.5V~VCC+0.5V
• Output clamp current ±20mA
• Continuous output current ±25mA
• Continuous current through VCC or GND ±50mA
• Storage temperature range -65℃~150℃
• Thermal resistance by package: DB package 70℃/W, DGV package 92℃/W, DW package 58℃/W, N package 69℃/W, NS package 60℃/W, PW package 83℃/W
• Input/output voltages may exceed rated range provided input/output current ratings are not exceeded; package thermal impedance calculated per JESD 51-7
• All unused device inputs must be connected to VCC or GND to ensure proper device operation
• Available in multiple packages: SN74AHC244 covers DB, DGV, DW, N, NS, PW packages; SN54AHC244 covers JORW, FK packages