Details, datasheet, quote on part number: SN54ALS174
CategorySemiconductors => Space & High Reliability => Logic Products => Flip-Flop/Latch/Registers
Part familySN54ALS174 Hex D-type Flip-Flops With Clear
TitleBipolar->ALS Family
DescriptionHex D-type Flip-Flops With Clear 20-LCCC -55 to 125
CompanyTexas Instruments, Inc.
DatasheetDownload SN54ALS174 datasheet
Cross ref.Similar parts: SN74LS112AD, SN74LS112ADR2, SN74LS174D, SN74LS174DR2, SN74LS174JD, SN74LS174JDS, SN74LS174JS, SN74LS174N, SN74LS174ND, SN74LS174NDS
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3-State OutputNo
Output TypeTTL
Technology FamilyALS
Package GroupCDIP,CFP,LCCC
Operating Temperature Range(C)-55 to 125
Input TypeTTL
Output Drive (IOL/IOH)(Max)(mA)8/-0.4
F @ Nom Voltage(Max)(Mhz)75
ICC @ Nom Voltage(Max)(mA)19
tpd @ Nom Voltage(Max)(ns)17
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
20FKLCCCS-CQCC-N1TUBESNJ54ALS 8.898.891.831.27
Application notes
• Input and Output Characteristics of Digital Integrated Circuits
This report contains a comprehensive collection of the input and output characteristic curves of typical integrated circuits from various logic families. These curves go beyond the information given in data sheets by providing additional details regarding | Doc
• 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
• Power-Up Behavior of Clocked Devices (Rev. A) | Doc
• Live Insertion
Many applications require the ability to exchange modules in electronic systems without removing the supply voltage from the module (live insertion). For example an electronic telephone exchange must always remain operational even during module maintenance | Doc
• Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A)
The spectrum of bus-interface devices with damping resistors or balanced/light output drive currently offered by various logic vendors is confusing at best. Inconsistencies in naming conventions and methods used for implementation make it difficult to iden | Doc
• Designing With Logic (Rev. C)
Data sheets, which usually give information on device behavior only under recommended operating conditions, may only partially answer engineering questions that arise during the development of systems using logic devices. However, information is frequently | Doc


Features, Applications

'ALS174 and 'AS174 Contain Six Flip-Flops With Single-Rail Outputs 'ALS175 and 'AS175B Contain Four Flip-Flops With Double-Rail Outputs Buffered Clock and Direct-Clear Inputs

Applications Include: ­ Buffer/Storage Registers ­ Shift Registers ­ Pattern Generators Fully Buffered Outputs for Maximum Isolation From External Disturbances ('AS Only)


These positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic. All have a direct-clear (CLR) input. The 'ALS175 and 'AS175B feature complementary outputs from each flip-flop. Information at the data (D) inputs meeting the setup-time requirements is transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock (CLK) input is at either the high or low level, the D-input signal has no effect at the output. These circuits are fully compatible for use with most TTL circuits.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.

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.

TA PACKAGE ORDERABLE PART NUMBER SN74ALS174N PDIP ­ N Tube SN74ALS175N SN74AS175BN Tube Tape and reel Tube to 70°C SOIC ­ D Tape and reel Tube Tape and reel Tube Tape and reel SN74AS175BDR SN74ALS174NSR SOP ­ NS Tape and reel SN74AS175BNSR SNJ54ALS174J CDIP ­ J Tube to 125°C CFP ­ W Tube SNJ54AS174FK SNJ54ALS175FK TOP-SIDE MARKING SNJ54ALS174FK SNJ54AS174FK

SNJ54ALS175FK Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at This orderable is not recommended for new designs. FUNCTION TABLE (each flip-flop) INPUTS CLR CLK OUTPUTS H Q0

To Five Other Channels Pin numbers shown are for the J, N, NS, and W packages.

absolute maximum ratings over operating free-air temperature range, SN54/74ALS174, SN54/74ALS175 (unless otherwise noted)

Supply voltage, VCC. 7 V Input voltage, VI. 7 V Package thermal impedance, JA (see Note 1): D package. 73°C/W N package. 67°C/W NS package. 64°C/W Storage temperature range, Tstg. 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. NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.

SN54ALS174 SN54ALS175 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 SN74ALS174 SN74ALS175 MIN NOM 5 MAX mA °C UNIT

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.


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SN54ALS174J ti SN54ALS174, Hex D-type Flip-flops With Clear
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SN54ALS175J ti SN54ALS175, Quadruple D-type Flip-flops With Clear
SN54ALS191A Synchronous 4-bit Up/down Binary Counters
SN54ALS191AJ ti SN54ALS191A, Synchronous 4-Bit Up/down Binary Counter
SN54ALS191J ti SN54ALS191, Synchronous 4-Bit Up/down Binary Counters
SN54ALS193A Synchronous 4-bit Up/down Binary Counters With Dual Clock And Clear
SN54ALS193AJ ti SN54ALS193A, Synchronous 4-Bit Up/down Binary Counters With Dual Clock
SN54ALS193J ti SN54ALS193, Synchronous 4-Bit Up/down Binary Counters With Dual Clock And Clear
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