SN74AC244

D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 7.5 ns at 5 V description/ordering information These octal buffers and line 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 ’AC244 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes noninverted 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. SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS514E − JUNE 1995 − REVISED OCTOBER 2003 SN54AC244 . . . J OR W PACKAGE SN74AC244 . . . DB, DW, N, NS, OR PW PACKAGE (TOP VIEW) 1OE 1 1A1 2 2Y4 3 1A2 4 2Y3 5 1A3 6 2Y2 7 1A4 8 2Y1 9 GND 10 20 VCC 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 SN54AC244 . . . FK PACKAGE (TOP VIEW) 2Y4 1A1 1OE VCC 2OE 3 2 1 20 19 1A2 4 18 1Y1 2Y3 5 17 2A4 1A3 6 16 1Y2 2Y2 7 15 2A3 1A4 8 14 1Y3 9 10 11 12 13 2Y1 GND 2A1 1Y4 2A2 ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube SN74AC244N SN74AC244N SOIC − DW Tube Tape and reel SN74AC244DW SN74AC244DWR AC244 −40°C to 85°C SOP − N...