1 Features

• Operating voltage range of 4.5V to 5.5V

• High-current outputs drive up to 15 LSTTL loads

• Low power consumption, 80μA max ICC

• Typical tpd = 12 ns

• ±6mA output drive at 5V

• Low input current of 1μA max

• Inputs are TTL-voltage compatible

• 3-state outputs drive bus lines or buffer memory

address registers

2 Description

These octal buffers and line drivers are designed

specifically to improve both the performance and

density of 3-state memory address drivers, clock

drivers, and bus-oriented receivers and transmitters.

The ’HCT240 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.