SN74LS26DRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74LS26DRG4 is a quad 2-input NAND gate with open-collector outputs in a 14-pin SOIC package, featuring LS-TTL logic levels, 8 mA sink current, and 15 pF load capacitance for wired-AND bus applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS26DRG4 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 topology with 4 independent gate elements
- Open-collector outputs sink up to 8 mA enabling wired-AND configurations
- LS-TTL family compatibility at 5 V supply for broad legacy system integration
- 14-pin SOIC package with tape-and-reel (DRG4) for automated PCB assembly
- 15 pF load capacitance spec supports reliable switching at standard LS speeds
- JESD-609 e4 classification for RoHS-compliant halogen-free assembly
Applications
The SN74LS26DRG4 is widely used in digital control circuits where wired-AND logic consolidation is needed, such as interrupt request lines, bus arbitration, and level-translation interfaces in industrial PLCs and communication equipment. Its open-collector outputs allow multiple devices to share a single pull-up resistor on a common bus, reducing component count in backplane and multi-master designs. Legacy 5 V TTL systems in test and measurement instruments also rely on the LS26 for reliable NAND gating with standard LS-series drive capability.
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 | 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 |
| 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 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS26DRG4:
Frequently Asked Questions
How much current can the SN74LS26DRG4 open-collector outputs sink, and what external pull-up is required?
The SN74LS26DRG4 open-collector outputs can sink up to 8 mA, so a pull-up resistor connected to 5 V (or lower bus voltage) must be sized to limit current below that threshold; a typical value of 1 kΩ to 4.7 kΩ suits most LS-TTL fanout scenarios.
In what wired-AND applications is the SN74LS26DRG4 most commonly used?
The SN74LS26DRG4 is commonly used to implement shared interrupt request lines, bus arbitration logic, and multi-master control buses where multiple open-collector outputs tie to a single pull-up resistor, allowing any asserted output to pull the line low across 4 gate channels simultaneously.
Is the SN74LS26DRG4 compatible with modern 3.3 V logic, or does it require a 5 V rail?
The SN74LS26DRG4 is an LS-TTL part requiring a 5 V supply with input thresholds of approximately 0.8 V low and 2.0 V high; driving it from a 3.3 V output may not meet the VIH requirement of 2.0 V, so a logic-level translator or 5 V-tolerant buffer is recommended for mixed-voltage boards.
What is the load capacitance rating of the SN74LS26DRG4, and how does it affect switching speed?
The SN74LS26DRG4 is specified with a 15 pF load capacitance; exceeding this value increases propagation delay beyond the datasheet typical of about 22 ns, so PCB trace lengths and fanout should be kept short to maintain signal integrity in high-speed control buses.
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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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