Texas Instruments CD74HCT244E Manual


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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 VCC = 5 V,
CL = 15 pF, TA = 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: NIL = 30%, NIH = 30% of
VCC at VCC = 5 V
HCT types:
4.5 V to 5.5 V operation
Direct LSTTL input logic compatibility,
VIL = 0.8 V (max), VIH = 2 V (min)
CMOS input compatibility, II ≤ 1μA at VOL, VOH
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.
Device Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
CD74HC240 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD54HC240 F (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
CD54HCT240 F (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
CD54HCT241 F (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
CD54HC244 F (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
CD54HCT244 F (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
SCHS167F – NOVEMBER 1997 – REVISED FEBRUARY 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.


Produkt Specifikationer

Mærke: Texas Instruments
Kategori: Ikke kategoriseret
Model: CD74HCT244E
Type: Logisk kredsløb
Bredde: 26.92 mm
Dybde: 6.6 mm
Højde: 4.57 mm
Antal pr. pakke: 20 stk
Pakkedybde: 506 mm
Pakkebredde: 13.97 mm
Pakkehøjde: 11.23 mm
Opbevaringstemperatur (T-T): -65 - 150 °C
Driftstemperatur (T-T): -55 - 125 °C
Pakketype: PDIP
Antal stifter: 20
Bredde (med stifter): 26.92 mm
Højde (med stifter): 8.26 mm
Dybde (med stifter): 10.92 mm

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