OCTAL BUFFERS/DRIVERS
D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 6.5 ns at 5 V
description/ordering information
T...
Description
D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 6.5 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 ’AC240 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.
SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS512E − JUNE 1995 − REVISED OCTOBER 2003
SN54AC240 . . . J OR W PACKAGE SN74AC240 . . . 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
SN54AC240 . . . 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
SN74AC240N
SN74AC240N
SOIC − DW
Tube Tape and reel
SN74AC240DW SN74AC240DWR
AC240
−40°C to 85°C
SOP − NS S...
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