74HCT27 datasheet(2/5 Pages) PHILIPS

No de pièce	74HCT27

Description	Triple 3-input NOR gate

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Fabricant	PHILIPS [NXP Semiconductors]

Site Internet	http://www.nxp.com

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December 1990

2

Philips Semiconductors

Product speciﬁcation

Triple 3-input NOR gate

74HC/HCT27

FEATURES

• Output capability: standard

• ICC category: SSI

GENERAL DESCRIPTION

The 74HC/HCT27 are high-speed Si-gate CMOS devices

and are pin compatible with low power Schottky TTL

(LSTTL). They are specified in compliance with JEDEC

standard no. 7A.

The 74HC/HCT27 provide the 3-input NOR function.

QUICK REFERENCE DATA

GND = 0 V; Tamb =25 °C; tr =tf = 6 ns

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD =CPD × VCC2 × fi +∑ (CL × VCC2 × fO) where:

fi = input frequency in MHz

fo = output frequency in MHz

∑ (CL × VCC2 × fo) = sum of outputs

CL = output load capacitance in pF

VCC = supply voltage in V

2. For HC the condition is VI = GND to VCC

For HCT the condition is VI = GND to VCC − 1.5 V

ORDERING INFORMATION

See

“74HC/HCT/HCU/HCMOS Logic Package Information”.

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

HC

HCT

tPHL/ tPLH

propagation delay nA, nB, nC to nY

CL = 15 pF; VCC = 5 V

8

10

ns

CI

input capacitance

3.5

pF

CPD

power dissipation capacitance per gate

notes 1 and 2

24

30

pF

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