Texas Instruments 74LS | Texas Instruments
74LS series from Texas Instruments
Texas Instruments 74LS Series Overview
Low-power Schottky TTL logic family offering a balance of speed and power consumption.
The 74LS from Texas Instruments is a Low-power Schottky TTL logic family offering a balance of speed and power consumption. This series includes 55 variants, each tailored for specific application requirements while sharing a common architecture and design ecosystem.
As part of the 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 4.75V to 5.25V supply rails, the 74LS devices deliver consistent performance across the full operating temperature range.
Octatronics stocks 74LS 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
- 4.75V to 5.25V Supply Voltage RangeOperates from 4.75V to 5.25V 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
- Legacy system maintenance
- Industrial control
- Educational labs
- Prototype development
Compare 74LS Variants
Side-by-side comparison of 10 product variants from Texas Instruments
| Parameter | SN74LS93DRE4 | SN74LS92DRG4 | SN74LS93DR | SN74LS93N | SN74LS93NSR | SN74LS92DRE4 | SN74LS93DRG4 | SN74LS92DR | SN74LS90NE4 | SN74LS90DRG4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-DIP (0.300", 7.62mm) | 14-SOIC (0.209", 5.30mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-DIP (0.300", 7.62mm) | 14-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Count Rate | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz | 42 MHz |
| Direction | Up | Up | Up | Up | Up | Up | Up | Up | Up | Up |
| Logic Type | Binary Counter | Divide-by-12 | Binary Counter | Binary Counter | Binary Counter | Divide-by-12 | Binary Counter | Divide-by-12 | Counter, Decade | Counter, Decade |
| Number of Bits Per Element | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Reset | Asynchronous | Synchronous | Asynchronous | Asynchronous | Asynchronous | Synchronous | Asynchronous | Synchronous | Asynchronous | Asynchronous |
| Supplier Device Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-PDIP | 14-SO | 14-SOIC | 14-SOIC | 14-SOIC | 14-PDIP | 14-SOIC |
| Supply Voltage | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V |
| Trigger Type | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Negative Edge | Negative Edge |
| Request Quote | Request Quote | Request Quote | Request Quote | Request Quote | Request Quote | Request Quote | Request Quote | Request Quote | Request Quote |
Base Numbers
| Base Number | Description | Variants | Status | Action |
|---|---|---|---|---|
| 74LS138 | 74LS138 variants from Texas Instruments | 1 MPNs | Active | View Details |
| SN74LS | Texas Instruments SN74LS parts are 5 V Low-Power Schottky TTL logic devices used in legacy gates, buffers, counters, latches, decoders, and bus-interface circuits. | 292 MPNs | Active | View Details |
Technical Specifications
Compare key 74LS specifications across available variants. All parameters are typical values at 25 degC unless otherwise noted.
Electrical Characteristics
Operating Conditions
Frequently Asked Questions
Common technical questions about the 74LS series.