74AHCT240

Octal buffer/line driver; inverting; 3-state

Rev. 6 — 29 June 2020

Product data sheet

1. General description

The 74AHCT240 is an 8-bit inverting buffer/line driver with 3-state outputs. This device can be

used as two 4-bit buffers or one 8-bit buffer. It features two output enables (1OE and 2OE),

each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a

high-impedance OFF-state. Inputs are over voltage tolerant. This feature allows the use of these

devices as translators in mixed voltage environments.

2. Features and benefits

• Balanced propagation delays

• All inputs have a Schmitt-trigger action

• Inputs accepts voltages higher than VCC

• Operates with TTL input levels

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• CDM JESD22-C101D exceeds 1000 V

• Multiple package options

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

3. Ordering information

Table 1. Ordering information

Package

Type number

Temperature range Name

Description

Version

74AHCT240D

-40 °C to +125 °C

SO20

plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74AHCT240PW

-40 °C to +125 °C

TSSOP20

plastic thin shrink small outline package; 20 leads;

body width 4.4 mm

SOT360-1

74AHCT240BQ

-40 °C to +125 °C

DHVQFN20 plastic dual in-line compatible thermal enhanced

very thin quad flat package; no leads; 20 terminals;

body 2.5 × 4.5 × 0.85 mm

SOT764-1