SN74LS26DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS26DR is a quadruple 2-input NAND gate IC from Texas Instruments in the LS TTL logic family, featuring four independent gates with open-collector outputs and 8mA output drive. It operates with 15pF load capacitance tolerance and is housed in a 14-pin SOIC package with RoHS-compliant lead-free construction. Available from stock worldwide with competitive pricing and tape-and-reel delivery.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS26DR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Quadruple 2-input NAND gate with open-collector outputs enabling wired-AND bus logic configurations and flexible high-voltage open-collector interfacing
- LS TTL logic family with 8mA maximum output low current (IOL) and 15pF load capacitance spec for reliable operation in standard 5V digital logic systems
- 14-pin SOIC (R-PDSO-G14) surface-mount package with RoHS lead-free (Pb-free) and e4 JEDEC moisture sensitivity compliance for automated assembly
- 15-year estimated time on life (YTEOL) ensuring long-term product availability for industrial and communications infrastructure designs
Applications
The SN74LS26DR is used in digital logic circuits requiring open-collector NAND gate functions, such as interrupt request (IRQ) wired-OR bus implementations in legacy embedded systems, microcomputer peripherals, and industrial control logic boards. Its open-collector output allows the gate output to drive loads at voltage levels higher than the logic supply, making it useful for relay drivers, LED indicators, and level-shifting applications. It also finds use in combinational logic designs, address decoding, and signal conditioning circuits in telecommunications and computing equipment.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | LS |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | NAND GATE |
| Max I(ol) | 0.008A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Output Characteristics | OPEN-COLLECTOR |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 4.4mA |
| Prop. Delay@Nom-Sup | 32ns |
| Propagation Delay (tpd) | 28ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the key feature of the SN74LS26DR output stage?
The SN74LS26DR features open-collector outputs on all four NAND gates. This output type requires an external pull-up resistor to a positive supply and allows multiple gate outputs to be tied together for wired-AND logic. It also enables the outputs to drive loads at voltages higher than the 5V logic supply, useful for relay and LED interfacing.
How many NAND gates are in the SN74LS26DR and what are the input specifications?
The SN74LS26DR contains four independent 2-input NAND gates (Number of Functions: 4, Number of Inputs: 2 per gate). It is designed to drive a maximum load capacitance of 15pF per output and provides a maximum output low-level current (IOL) of 8mA, consistent with the LS TTL family drive specifications.
What package does the SN74LS26DR come in?
The SN74LS26DR is housed in a 14-pin SOIC surface-mount package (JESD-30 code R-PDSO-G14) with RoHS-compliant lead-free (Pbfree Code: Yes) and e4 JEDEC moisture sensitivity level rating. The DR suffix denotes SOIC-14 packaging in tape-and-reel format for use in automated SMT pick-and-place assembly.
Is the SN74LS26DR still in production and available long-term?
Yes, the SN74LS26DR has a YTEOL (Years to End of Life) value of 15, indicating Texas Instruments plans to continue producing this device for at least 15 more years from the published date. This makes it a reliable long-term supply choice for industrial, infrastructure, and legacy system maintenance applications.
What are common alternatives to the SN74LS26DR?
Functionally similar open-collector NAND alternatives include the SN74LS01 (quad 2-input NAND, open-collector) and SN74HC03 (CMOS version with higher noise immunity and lower power). For designs migrating from LS TTL to CMOS, the SN74AHC03 offers pin-compatible open-drain outputs with improved speed and lower supply current. Verify pull-up resistor values and voltage compatibility when switching logic families.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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