Input Voltage

Schmitt-trigger

CMOS Input

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CMOS Input

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Input Voltage

Input Voltage

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Input Voltage

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Low Power

Noise Rejection

Supports Slow Inputs

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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.

SN74HCS27

SCLS794A – FEBRUARY 2020 – REVISED JUNE 2020

SN74HCS27 Triple 3-Input NOR Gates with Schmitt-Trigger Inputs

1

1 Features

1

•

Wide operating voltage range: 2 V to 6 V

•

Schmitt-trigger inputs allow for slow or noisy input

signals

•

Low power consumption

–

Typical ICC of 100 nA

–

Typical input leakage current of ±100 nA

•

±7.8-mA output drive at 5 V

•

Extended ambient temperature range: –40°C to

+125°C, TA

2 Applications

•

Alarm / tamper detect circuit

•

S-R latch

3 Description

This device contains three independent 3-input NOR

Gates with Schmitt-trigger inputs. Each gate performs

the Boolean function Y = A + B + C in positive logic.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SN74HCS27DR

SOIC (14)

8.70 mm × 3.90 mm

SN74HCS27PWR

TSSOP (14)

5.00 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Benefits of Schmitt-trigger Inputs