Operating Voltage Range of 4.5 V to 5.5 V

State-of-the-Art BiCMOS Design

Significantly Reduces ICCZ

Output Ports Have Equivalent 33-Ω Series

Resistors, So No External Resistors Are

Required

3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

description/ordering information

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. Together with the SN74BCT2241

and the ’BCT2244 devices, these devices provide

the choice of selected combinations of inverting

and noninverting outputs, symmetrical active-low

output-enable (OE) inputs, and complementary

OE and OE inputs. These devices feature high

fan-out and improved fan-in.

The ’BCT2240 devices are organized as two 4-bit

line drivers with separate output-enable (OE)

inputs. When OE is low, the device passes 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.

The outputs, which are designed to source or sink up to 12 mA, include 33-Ω series resistors to reduce overshoot

and undershoot.