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74HCT259BQ

8-bit addressable latch

The 74HC259; 74HCT259 is an 8-bit addressable latch. The device features four modes of operation. In the addressable latch mode, data on the D input is written into the latch addressed by the inputs A0 to A3. The addressed latch will follow the data input, non-addressed latches will retain their previous states. In memory mode, all latches retain their previous states and are unaffected by the data or address inputs. In the 3-to-8 decoding or demultiplexing mode, the addressed output follows the D input and all other outputs are LOW. In the reset mode, all outputs are forced LOW and unaffected by the data or address inputs. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Alternatives

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT259BQ 74HCT259BQ,115 935288456115 SOT763-1 Order product

Features and benefits

  • Wide supply voltage range from 2.0 V to 6.0 V
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Complies with JEDEC standards:
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • Combined demultiplexer and 8-bit latch
  • Serial-to-parallel capability
  • Output from each storage bit available
  • Random (addressable) data entry
  • Easily expandable
  • Common reset input
  • Useful as a 3-to-8 active HIGH decoder
  • Input levels:
    • For 74HC259: CMOS level
    • For 74HCT259: TTL level
  • ESD protection:
    • HBM: ANSI/ESDA/Jedec JS-001 Class 2 exceeds 2000 V
    • CDM: ANSI/ESDA/Jedec JS-002 Class C3 exceeds 1000 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HCT259BQProduction4.5 - 5.5TTL± 420low-40~1258910.857DHVQFN16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74HCT259BQ74HCT259BQ,115
( 9352 884 56115 ) 		ActiveHCT259
DHVQFN16
(SOT763-1) 		SOT763-1Reel 7” Q1/T1 or Q2/T3

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
74HCT259BQ74HCT259BQ,11574HCT259BQ
Quality and reliability disclaimer

Series

Documentation (5)

File nameTitleTypeDate
74HC_HCT2598-bit addressable latchData sheet2022-12-05
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hct25974HCT259 IBIS modelIBIS model2022-10-21
74HCT259BQ_Nexperia_Product_Reliability74HCT259BQ Nexperia Product ReliabilityQuality document2022-05-04
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31

Support

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Models

File nameTitleTypeDate
hct25974HCT259 IBIS modelIBIS model2022-10-21

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
74HCT259BQ74HCT259BQ,115935288456115Reel 7” Q1/T1 or Q2/T3- Order product

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.