Details, datasheet, quote on part number: SN74ALS21A
CategorySemiconductors => Logic => Gate => AND Gate
Part familySN74ALS21A Dual 4-Input Positive-AND Gates
TitleBipolar->ALS Family
DescriptionDual 4-Input Positive-AND Gates 14-SOIC 0 to 70
CompanyTexas Instruments, Inc.
DatasheetDownload SN74ALS21A datasheet
Cross ref.Similar parts: SN74LS21D, SN74LS21DR2, SN74LS21J, SN74LS21JD, SN74LS21JDS, SN74LS21JS, SN74LS21N, SN74LS21ND, SN74LS21NDS, SN74LS21NS
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Operating Temperature Range(C)0 to 70
Technology FamilyALS
Schmitt TriggerNo
Output Drive (IOL/IOH)(Max)(mA)-0.4/8
Package GroupPDIP,SO,SOIC
ICC @ Nom Voltage(Max)(mA)0.0014
tpd @ Nom Voltage(Max)(ns)15
Approx. Price (US$)0.31 | 1ku
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
14DSOICR-PDSO-G50TUBEALS21A 3.918.651.581.27
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

Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs


These devices contain two independent 4-input positive-AND gates. They perform the Boolean functions or in positive logic. The SN54ALS21A and SN54AS21 are characterized for operation over the full military temperature range to 125°C. The SN74ALS21A and SN74AS21 are characterized for operation from to 70°C.


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.

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.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, VCC. 7 V Input voltage, VI. 7 V Operating free-air temperature range, TA: to 70°C Storage temperature range. to 150°C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

SN54ALS21A MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature NOM 5 MAX 5.5 SN74ALS21A MIN NOM 5 MAX 5.5 UNIT mA °C

electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)

mA All typical values are at VCC 25°C. § The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

Supply voltage, VCC. 7 V Input voltage, VI. 7 V Operating free-air temperature range, TA: to 70°C Storage temperature range. to 150°C

SN54AS21 MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature NOM 5 MAX 5.5 SN74AS21 MIN NOM 5 MAX 5.5 UNIT mA °C


VCC VI mA All typical values are at VCC 25°C. § The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.


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0-C     D-L     M-R     S-Z