SN74LS26D Texas Instruments Integrated Circuit (Other) In Stock
The SN74LS26D is a quad 2-input high-voltage interface NAND gate from Texas Instruments featuring open-collector outputs rated for high-voltage loads. It operates from a 4.75 V to 5.25 V supply with 8 mA sink current and 15 pF load capacitance per gate. Housed in a 14-pin SOIC package and RoHS-compliant for modern PCB assembly.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS26D 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
- Quad 2-input NAND gates with open-collector outputs capable of sinking 8 mA for wired-AND bus configurations
- High-voltage interface design allows outputs to switch loads well above the 5 V supply rail
- LS-family bipolar technology offers fast propagation delay with low static power consumption at 5 V operation
- 14-pin SOIC package (JESD-30 R-PDSO-G14) with 15 pF load capacitance supports compact surface-mount layouts
Applications
The SN74LS26D is used in digital systems that require open-collector NAND logic for implementing wired-AND bus networks, where multiple outputs share a common pull-up resistor to generate a composite logic signal. It is also applied in level-shifting and driving indicator LEDs, relays, or optocouplers that require higher voltages than the standard 5 V logic supply. Industrial control panels, bus arbitration circuits, and interrupt-driven microcontroller systems frequently use this device for robust logic interfacing.
Specifications
| YTEOL | 0 |
| 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 | TUBE |
| 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 |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS26D:
Frequently Asked Questions
What makes the SN74LS26D different from standard NAND gates like the 74LS00?
The SN74LS26D features open-collector outputs, unlike the 74LS00's totem-pole outputs. Open-collector outputs require an external pull-up resistor but allow outputs to be wire-AND connected on a shared bus, and they can switch loads at voltages higher than the device's 5 V supply. This makes the SN74LS26D ideal for bus interfacing, level translation, and driving higher-voltage peripheral devices.
What is the maximum output sink current and load voltage for the SN74LS26D?
The SN74LS26D can sink up to 8 mA (I_OL) per open-collector output. The open-collector transistors support switching loads at voltages beyond the 5 V VCC, making them suitable for driving LEDs, relays, and optocouplers in applications where the load voltage may exceed standard logic levels. Always consult the datasheet for the maximum collector voltage specification.
Does the SN74LS26D require an external pull-up resistor?
Yes, the SN74LS26D requires an external pull-up resistor connected from each open-collector output to the desired load supply voltage. Without this resistor, the output can only pull low; it cannot actively drive the output high. The pull-up resistor value determines the output HIGH level and the output rise time, and should be selected based on the load current requirement and the desired switching speed.
What supply voltage does the SN74LS26D operate on and what package is it available in?
The SN74LS26D operates on a 4.75 V to 5.25 V supply voltage, consistent with the standard 5 V TTL/LS logic family. It is packaged in a 14-pin Small Outline Integrated Circuit (SOIC) package, JESD-30 code R-PDSO-G14, which is a compact surface-mount format with 1.27 mm lead pitch widely used in automated PCB production.
Is the SN74LS26D RoHS-compliant and available with lead-free terminations?
Yes, the SN74LS26D carries JESD-609 code e4, confirming it is RoHS-compliant and manufactured with lead-free solder terminations. This makes it suitable for use in consumer electronics, industrial equipment, and other products that must comply with EU RoHS directives and comparable international environmental regulations for hazardous substances.
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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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