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Texas Instruments 54LS | Texas Instruments

54LS series from Texas Instruments

Texas Instruments 54LS Series Overview

Military-temperature-range low-power Schottky TTL logic for harsh environment applications.

The 54LS from Texas Instruments is a Military-temperature-range low-power Schottky TTL logic for harsh environment applications. This series includes 3 variants, each tailored for specific application requirements while sharing a common architecture and design ecosystem.

As part of the Military-Grade Low-Power Schottky TTL family, these devices provide industry-standard pinouts and well-characterized electrical specifications, enabling straightforward integration into new designs and drop-in replacement in existing systems. Operating from 4.5V to 5.5V supply rails, the 54LS devices deliver consistent performance across the full operating temperature range.

Octatronics stocks 54LS variants in multiple package options. Request a quote for volume pricing, check real-time availability, or contact our engineering team for application support and alternative part recommendations.

Key Features

  • 4.5V to 5.5V Supply Voltage RangeOperates from 4.5V to 5.5V supply rails for broad system compatibility and flexible power-rail design.
  • Industry-Standard PinoutsDrop-in compatible with standard logic family pinouts, simplifying board layout and enabling multi-source procurement.
  • Propagation delay ~10ns Switching PerformancePropagation delay ~10ns enable reliable operation in high-frequency digital systems.
  • Low Quiescent PowerCMOS technology ensures minimal static power consumption, extending battery life in portable applications.
  • Wide Temperature RangeQualified for commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges for diverse deployment environments.

Target Applications

  • Military electronics
  • Aerospace avionics
  • Defense systems
  • Extreme-temperature applications

Compare 54LS Variants

Side-by-side comparison of 10 product variants from Texas Instruments

ParameterSN54LS93JSN54LS593JSN54LS590JSN54LS47JSN54LS73AJSN54LS49JSN54LS592JSN54LS91JSN54LS90JSN54LS645J
Package / Case14-CDIP (0.300", 7.62mm)20-CDIP (0.300", 7.62mm)16-CDIP (0.300", 7.62mm)16-CDIP (0.300", 7.62mm)14-CDIP (0.300", 7.62mm)14-CDIP (0.300", 7.62mm)16-CDIP (0.300", 7.62mm)14-CDIP (0.300", 7.62mm)14-CDIP (0.300", 7.62mm)20-CDIP (0.300", 7.62mm)
Operating Temperature-55°C ~ 125°C (TA)-55°C ~ 125°C (TA)-55°C ~ 125°C (TA)-55°C ~ 125°C-55°C ~ 125°C (TA)-55°C ~ 125°C-55°C ~ 125°C (TA)-55°C ~ 125°C (TA)-55°C ~ 125°C (TA)-55°C ~ 125°C (TA)
Count Rate42 MHz35 MHz35 MHz---35 MHz-42 MHz-
DirectionUpUpUp---Up-Up-
Logic TypeBinary CounterBinary CounterBinary Counter---Binary CounterShift RegisterCounter, DecadeTransceiver, Non-Inverting
Number of Bits Per Element488-1-8848
Number of Elements111-2-1111
ResetAsynchronousSynchronousAsynchronous---Asynchronous-Asynchronous-
Series54LS54LS54LS54LS54LS54LS54LS54LS54LS54LS
Supplier Device Package14-CDIP20-CDIP16-CDIP16-CDIP14-CDIP14-CDIP16-CDIP14-CDIP14-CDIP20-CDIP
Supply Voltage4.5 V ~ 5.5 V4.5 V ~ 5.5 V4.5 V ~ 5.5 V4.5V ~ 5.5V4.5V ~ 5.5V4.5V ~ 5.5V4.5 V ~ 5.5 V4.5V ~ 5.5V4.5 V ~ 5.5 V4.5V ~ 5.5V
Trigger TypeNegative EdgePositive EdgePositive Edge-Negative Edge-Positive Edge-Negative Edge-
Request QuoteRequest QuoteRequest QuoteRequest QuoteRequest QuoteRequest QuoteRequest QuoteRequest QuoteRequest QuoteRequest Quote
Selection Guide
📦Package
14-CDIP (0.300", 7.62mm)→SN54LS93JSN54LS73AJSN54LS49JSN54LS91JSN54LS90J
20-CDIP (0.300", 7.62mm)→SN54LS593JSN54LS645J
16-CDIP (0.300", 7.62mm)→SN54LS590JSN54LS47JSN54LS592J
🌡️Temperature Range
-55°C ~ 125°C (TA)→SN54LS93JSN54LS593JSN54LS590JSN54LS73AJSN54LS592JSN54LS91JSN54LS90JSN54LS645J
-55°C ~ 125°C→SN54LS47JSN54LS49J

Base Numbers

Base NumberDescriptionVariantsStatusAction
SN54LSSN54LS variants from Texas Instruments27 MPNsActiveView Details

Technical Specifications

Compare key 54LS specifications across available variants. All parameters are typical values at 25 degC unless otherwise noted.

Electrical Characteristics

Supply Voltage (VCC)
4.5V to 5.5V
Propagation Delay
~10ns
Output Drive
±24 mA (typical)
Quiescent Current
<1 µA per gate (typical)

Operating Conditions

Temperature Range
-40°C to 85°C (industrial)
Package Options
SOIC, TSSOP, VSSOP, QFN
ESD Protection
HBM >= 2000V

Frequently Asked Questions

Common technical questions about the 54LS series.

The 54LS is a Texas Instruments Military-temperature-range low-power Schottky TTL logic for harsh environment applications. The series includes 3 variants optimized for different application requirements.
The 54LS series currently includes 3 variants. Each variant may differ in package type, operating specifications, and feature set. Browse the product table above to compare available options.
The 54LS series is used in Military electronics, Aerospace avionics, Defense systems, and Extreme-temperature applications. Contact our applications team for design-in support and recommendation.
Octatronics is an authorized distributor of Texas Instruments products including the 54LS series. We provide competitive pricing, fast delivery, and full traceability for all components. Request a quote or contact us for availability and lead times.
Yes, Octatronics supports both prototype and production quantities for the 54LS series. Small-quantity orders are available for design evaluation, with volume pricing for production runs. Contact our sales team for custom pricing.