器件名称:
AD240
功能描述:
OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
文件大小:
571.03KB 共18页
简 介:
SN54ACT240, SN74ACT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS515C – JUNE 1995 – REVISED OCTOBER 2002 D D 4.5-V to 5.5-V VCC Operation Inputs Accept Voltages to 5.5 V SN54ACT240 . . . J OR W PACKAGE SN74ACT240 . . . DB, DW, N, NS, OR PW PACKAGE (TOP VIEW) D D Max tpd of 8.5 ns at 5 V Inputs Are TTL Compatible SN54ACT240 . . . FK PACKAGE (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 1A2 2Y3 1A3 2Y2 1A4 4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13 2Y4 1A1 1OE VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 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 ’ACT240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes inverted 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. ORDERING INFORMATION TA PDIP – N SOIC – DW –40 40°C to 85°C SOP – NS SSOP – DB TSSOP – PW CDIP – J –55°C to 125°C CFP – W LCCC – FK PACKAGE Tube Tube Tape and reel Tape and reel Tape and reel……
