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PARAMETER

SYMBOL

MIN

MAX

UNITS

DC Supply Voltage

4.5

5.5

V

DC Input or Output Voltage

0

V

Operating Temperature Range

-40

+85

°C

Output current - High

-

-24

mA

Output current - Low

-

24

mA

0

10

Input Rise or Fall rate

Δt/ΔV

0

8

ns/V

PARAMETER

SYMBOL

VALUE

UNIT

DC Supply Voltage (Referenced to GND)

-0.5 to +7.0

V

DC Input Voltage (Referenced to GND)

V

DC Output Voltage (Referenced to GND)

V

DC Input Current, per pin

±20

mA

DC Output Current, per pin

±50

mA

±50

mA

Power Dissipation in Still Air

2

750

mW

Storage Temperature Range

-65 to 150

°C

Advanced CMOS TTL Input – 74ACT240

Rev 1.1

30/11/21

1. Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may

reduce device reliability. 2. Measured in plastic DIP package, results in die form are dependent on die attach and assembly method.

Pad Descriptions

ADDRESS INPUTS

1A1, 1A2, 1A3, 1A4, 2A1, 2A2, 2A3, 2A4

(Pads 2, 4, 6, 8, 11, 13, 15, 17)

Data input pins. Data on these pins appear in inverted form on the corresponding Y outputs, when the outputs are enabled.

CONTROL INPUTS

1OE, 2OE (Pads 1, 19)

Output enables (active–low). When a low level is applied to these pins, the outputs are enabled and the devices function as inverters.

When a high level is applied, the outputs assume the high impedance state.

OUTPUTS

1Y1, 1Y2, 1Y3, 1Y4, 2Y1, 2Y2, 2Y3, 2Y4

(Pads 18, 16, 14, 12, 9, 7, 5, 3)

Device outputs. Depending upon the state of the output enable pins, these outputs are either inverting outputs or high–impedance

outputs.

3. This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be