Optimized for 1.8-V Operation and is 3.6-V

I/O Tolerant to Support Mixed-Mode Signal

Operation

Ioff Supports Partial-Power-Down Mode

Operation

Sub 1-V Operable

Max tpd of 1.7 ns at 1.8 V

Low Power Consumption, 20-μA Max ICC

±8-mA Output Drive at 1.8 V

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

ESD Protection Exceeds JESD 22

− 2000-V Human-Body Model (A114-A)

− 200-V Machine Model (A115-A)

− 1000-V Charged-Device Model (C101)

description/ordering information

This octal buffer/driver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V VCC

operation.

The SN74AUC240 is designed specifically to improve the performance and density of 3-state memory address

drivers, clock drivers, and bus-oriented receivers and transmitters.

This device is organized as two 4-bit buffers/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.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.