SN74HCS240 Octal Inverting Line Drivers With Schmitt-Trigger Inputs and 3-State

Outputs

1 Features

• Wide operating voltage range: 2V to 6V

• Schmitt-trigger inputs allow for slow or noisy input

signals

• Low power consumption

– Typical ICC of 100nA

– Typical input leakage current of ±100nA

• ±7.8mA output drive at 6V

• Extended ambient temperature range: –40°C to

+125°C, TA

2 Applications

• Enable or disable a digital signal

• Eliminate slow or noisy input signals

• Hold a signal during controller reset

• Debounce a switch

3 Description

This device contains eight independent inverting line

drivers with 3-state outputs and Schmitt-trigger inputs.

Each channel performs the Boolean function Y = A

in positive logic. The channels are grouped in sets of

four, with one OE pin controlling each set. The outputs

can be put into a hi-Z state by applying a high on the

associated OE pin.

Device Information

PART NUMBER

PACKAGE(1)

PACKAGE(2)

BODY SIZE(3)

SN74HCS240

DGS (VSSOP, 20)

5.1mm × 4.9mm

5.1mm × 3mm

RKS (VQFN, 20)

4.50mm × 2.50mm 4.50mm × 2.50mm

(1)

For more information, see Mechanical, Packaging, and

Orderable Information.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

(3)

The body size (length × width) is a nominal value and does

not include pins.

Input Voltage

Schmitt-trigger

CMOS Input

Response

Waveforms

Standard

CMOS Input

Response

Waveforms

Input Voltage

Input Voltage

Time

Time

Input Voltage

Waveforms

Low Power

Noise Rejection

Supports Slow Inputs

Time

Time

Time

Time

Benefits of Schmitt-trigger inputs

SN74HCS240

SCLS871B – JULY 2021 – REVISED AUGUST 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.