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74HC540DB

Octal buffer/line driver; 3-state; inverting

The 74HC540; 74HCT540 is an 8-bit inverting buffer/line driver with 3-state outputs. The device features two output enables (OE1 and OE2). A HIGH on OEn causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Not recommended for new designs (NRND).
This product has been discontinued, click here for discontinuation information and replacement parts.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors

Features and benefits

  • Wide supply voltage range from 2.0 V to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Inverting outputs
  • Input levels:
    • For 74HC540: CMOS level
    • For 74HCT540: TTL level
  • Complies with JEDEC standards
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

Parametrics

Type numberProduct statusPackage name
74HC540DB
NRND
End of lifeSSOP20

Package

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74HC540DB
NRND
74HC540DB,118
( 9351 901 30118 )
Discontinued / End-of-lifeHC540
SSOP20
(SOT339-1)
SOT339-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HC540DB,112
( 9351 901 30112 )
Discontinued / End-of-lifeHC540Bulk Pack

Discontinuation information

Type numberOrderable part numberOrdering codeLast time buy dateLast time delivery dateReplacement productStatusComments
74HC540DB
NRND
74HC540DB,11893519013011874HC540D
74HC540DB
NRND
74HC540DB,11293519013011274HC540D

Quality, reliability & chemical content

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC540DB
NRND
74HC540DB,11874HC540DB11
74HC540DB
NRND
74HC540DB,11274HC540DB11
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
74HC_HCT540Octal buffer/line driver; 3-state; invertingData sheet2021-10-19
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

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