Details, datasheet, quote on part number: SN74ALS259
CategorySemiconductors => Logic => Flip-Flop/Latch/Register => Other Latch
Part familySN74ALS259 Octal Addressable Latches
TitleBipolar->ALS Family
DescriptionOctal Addressable Latches 16-SOIC 0 to 70
CompanyTexas Instruments, Inc.
DatasheetDownload SN74ALS259 datasheet
Cross ref.Similar parts: SN74LS175JD, SN74LS175JDS, SN74LS175JS, SN74LS175N, SN74LS175ND, SN74LS175NDS, SN74LS175NS, SN74LS375JD, SN74LS375JDS, SN74LS375JS
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Operating Temperature Range(C)0 to 70
3-State OutputNo
Technology FamilyALS
tpd @ Nom Voltage(Max)(ns)19
Approx. Price (US$)1.29 | 1ku
Schmitt TriggerNo
ICC @ Nom Voltage(Max)(mA)22
Output Drive (IOL/IOH)(Max)(mA)8/-0.4
F @ Nom Voltage(Max)(Mhz)75
Package GroupPDIP,SOIC
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
16DSOICR-PDSO-G40TUBEALS259 3.919.91.581.27
Application notes
• Advanced Schottky (ALS and AS) Logic Families
This document introduces the advanced Schottky family of clamped TTL integrated circuits (ICs). Detailed electrical characteristics of the 'AS and 'ALS devices with table formats are provided. Guidelines for designing high-performance digital systems using | Doc


Features, Applications

8-Bit Parallel-Out Storage Register Performs Serial-to-Parallel Conversion With Storage Asynchronous Parallel Clear Active-High Decoder Enable/Disable Input Simplifies Expansion Expandable for n-Bit Applications Four Distinct Functional Modes Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs


These 8-bit addressable latches are designed for general-purpose storage applications in digital systems. Specific uses include working registers, serial-holding registers, and active-high decoders or demultiplexers. They are multifunctional devices capable of storing single-line data in eight addressable latches and being a 1-of-8 decoder or demultiplexer with active-high outputs.

Four distinct modes of operation are selectable by controlling the clear (CLR) and enable (G) inputs as shown in the function table. In the No internal connection addressable-latch mode, data at the data-in terminal is written into the addressed latch. The addressed latch follows the data input with all unaddressed latches remaining in their previous states. In the memory mode, all latches remain in their previous states and are unaffected by the data or address inputs. To eliminate the possibility of entering erroneous data in the latches, G should be held high (inactive) while the address lines are changing. In the 1-of-8 decoding or demultiplexing mode, the addressed output follows the level of the D input with all other outputs low. In the clear mode, all outputs are low and unaffected by the address and data inputs. The SN54ALS259 is characterized for operation over the full military temperature range to 125C. The SN74ALS259 is characterized for operation from to 70C. Function Tables


D = the level at the data input. QiO = the level 7 as appropriate) before the indicated steady-state input conditions were established.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.


G D CLR 10, 7R This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages.


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0-C     D-L     M-R     S-Z