Product details

Number of channels 8 Technology family LS Supply voltage (min) (V) 4.75 Supply voltage (max) (V) 5.25 Input type Bipolar Output type Push-Pull Clock frequency (max) (MHz) 35 IOL (max) (mA) 8 IOH (max) (mA) -0.4 Supply current (max) (µA) 27000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
Number of channels 8 Technology family LS Supply voltage (min) (V) 4.75 Supply voltage (max) (V) 5.25 Input type Bipolar Output type Push-Pull Clock frequency (max) (MHz) 35 IOL (max) (mA) 8 IOH (max) (mA) -0.4 Supply current (max) (µA) 27000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
PDIP (N) 20 228.702 mm² 24.33 x 9.4 SOIC (DW) 20 131.84 mm² 12.8 x 10.3 SOP (NS) 20 98.28 mm² 12.6 x 7.8
  • Contains Eight Flip-Flops With Single-Rail Outputs
  • Buffered Clock and Direct Clear Inputs
  • Individual Data Input to Each Flip-Flop
  • Applications Include:
    • Buffer/Storage Registers
    • Shift Registers
    • Pattern Generators
  • Contains Eight Flip-Flops With Single-Rail Outputs
  • Buffered Clock and Direct Clear Inputs
  • Individual Data Input to Each Flip-Flop
  • Applications Include:
    • Buffer/Storage Registers
    • Shift Registers
    • Pattern Generators

These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic with a direct clear input.

Information at the D inputs meeting the setup time requirements is transferred to the Q 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 input is at either the high or low level, the D input signal has no effect at the output.

These flip-flops are guaranteed to respond to clock frequencies ranging form 0 to 30 megahertz while maximum clock frequency is typically 40 megahertz. Typical power dissipation is 39 milliwatts per flip-flop for the ´273 and 10 milliwatts for the ´LS273.

 

 

 

These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic with a direct clear input.

Information at the D inputs meeting the setup time requirements is transferred to the Q 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 input is at either the high or low level, the D input signal has no effect at the output.

These flip-flops are guaranteed to respond to clock frequencies ranging form 0 to 30 megahertz while maximum clock frequency is typically 40 megahertz. Typical power dissipation is 39 milliwatts per flip-flop for the ´273 and 10 milliwatts for the ´LS273.

 

 

 

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Technical documentation

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Type Title Date
* Data sheet Octal D-Type Flip-Flop With Clear--SN54273, SN54LS273, SN74273, SN74LS273 datasheet 01 Mar 1988
Application note Power-Up Behavior of Clocked Devices (Rev. B) PDF | HTML 15 Dec 2022
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note TI IBIS File Creation, Validation, and Distribution Processes 29 Aug 2002
Application note Designing With Logic (Rev. C) 01 Jun 1997
Application note Designing with the SN54/74LS123 (Rev. A) 01 Mar 1997
Application note Input and Output Characteristics of Digital Integrated Circuits 01 Oct 1996
Application note Live Insertion 01 Oct 1996

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

14-24-LOGIC-EVM — Logic product generic evaluation module for 14-pin to 24-pin D, DB, DGV, DW, DYY, NS and PW packages

The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,

User guide: PDF | HTML
Not available on TI.com
Package Pins CAD symbols, footprints & 3D models
PDIP (N) 20 Ultra Librarian
SOIC (DW) 20 Ultra Librarian
SOP (NS) 20 Ultra Librarian

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