Texas Instruments CD74HCT241 Handleiding

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CDx4HC240, CDx4HCT240, CD74HC241, CDx4HCT241, CDx4HC244, CDx4HCT244

High-Speed CMOS Logic Octal Buffer/Line Drivers, Three-State

1 Features

•HC/HCT240 Inverting

•HC/HCT241 Non-inverting

•HC/HCT244 Non-inverting

•Typical propagation delay = 8ns at V

CC

= 5 V,

C

L

= 15 pF, T

A

= 25℃ for HC240

•Three-state outputs

•Buffered inputs

•High-current bus driver outputs

•Fanout (over temperature range)

–Standard outputs: 10 LSTTL loads

–Bus driver outputs: 15 LSTTL loads

•Wide operating temperature range: –55℃ to 125℃

•Balanced propagation delay and transition times

•Significant power reduction compared to LSTTL

Logic ICs

•HC types:

–2 V to 6 V operation

–High noise immunity: N

IL

= 30%, N

IH

= 30% of

V

CC

at V

CC

= 5 V

•HCT types:

–4.5 V to 5.5 V operation

–Direct LSTTL input logic compatibility,

V

IL

= 0.8 V (max), V

IH

= 2 V (min)

–CMOS input compatibility, I

I

≤ 1μA at V

OL

, V

OH

2 Description

The ’HC240 and ’HCT240 are inverting three-state

buffers having two active-low output enables.

The CD74HC241, ’HCT241, ’HC244 and ’HCT244 are

non-inverting three-state buffers that differ only in

that the 241 has one active-high and one active-low

output enable, and the 244 has two active-low output

enables. All three types have identical pinouts.

Package Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

CD74HC240

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

CD54HC240F (CDIP, 20)26.92 mm × 6.92 mm

CD74HCT240

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

PW (TSSOP, 20)6.50 mm × 4.40 mm

CD54HCT240F (CDIP, 20)26.92 mm × 6.92 mm

CD74HC241

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

CD74HCT241

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

CD54HCT241F (CDIP, 20)26.92 mm × 6.92 mm

CD74HC244

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

CD54HC244F (CDIP, 20)26.92 mm × 6.92 mm

CD74HCT244

M (SOIC, 20)12.80 mm × 7.50 mm

E (PDIP, 20)25.40 mm × 6.35 mm

CD54HCT244F (CDIP, 20)26.92 mm × 6.92 mm

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

the end of the data sheet.

Pinout Diagram

CD54HC240, CD74HC240, CD74HC241, CD54HC244

CD74HC244, CD54HCT240, CD74HCT240, CD54HCT241

CD74HCT241, CD54HCT244, CD74HCT244

SCHS167G – NOVEMBER 1998 – REVISED OCTOBER 2022

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.

Product specificaties