SN74LS26DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS26DG4 is a quad 2-input NAND gate with open-collector outputs from Texas Instruments, built using Low-power Schottky (LS) TTL technology. It contains four independent 2-input NAND gates with open-collector outputs supporting wired-AND configurations, with a maximum sink current of 8 mA. Available in a 14-pin SOIC package, it is widely used in digital logic design and system bus applications requiring TTL-compatible logic.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS26DG4 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
- Four independent 2-input NAND gates with open-collector outputs
- Open-collector output supports wired-AND logic configurations
- Low-power Schottky (LS) TTL family for reduced power consumption
- 8 mA output sink current capacity
- 14-pin SOIC package for surface-mount applications
Applications
The SN74LS26DG4 is used in digital logic circuits requiring wired-AND bus structures, bus interface logic, and TTL-to-open-collector signal conversion. It finds broad application in microprocessor system design, memory address decoding, and programmable logic interface circuits.
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 | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS26DG4:
Frequently Asked Questions
What type of logic gates does the SN74LS26DG4 contain?
The SN74LS26DG4 contains four independent 2-input NAND gates with open-collector outputs. The open-collector design allows multiple outputs to be wire-AND connected together on a shared bus without causing logic conflicts.
What is the maximum sink current for the SN74LS26DG4 open-collector outputs?
The SN74LS26DG4 open-collector outputs can sink a maximum of 8 mA (I_OL = 8 mA). This makes it suitable for driving indicator LEDs, relays, or other loads that require moderate current sinking capability in open-collector wired-AND configurations.
In what package is the SN74LS26DG4 available, and what does the 'G4' suffix indicate?
The SN74LS26DG4 is available in a 14-pin Small Outline IC (SOIC) package. The 'G4' suffix in Texas Instruments part numbering indicates the device is RoHS-compliant and shipped in a specific tape-and-reel packaging format suitable for automated surface-mount assembly.
How does the SN74LS26DG4 differ from other NAND gate variants like the SN74LS00?
The key difference is the output type. The SN74LS00 uses totem-pole (push-pull) outputs that actively drive both high and low logic levels, whereas the SN74LS26DG4 uses open-collector outputs that only actively pull the output low. The SN74LS26DG4 requires an external pull-up resistor to establish a logic high, but this enables multiple outputs to share the same line in wired-AND bus configurations, which totem-pole outputs cannot safely do.
What is the recommended pull-up resistor value when using the SN74LS26DG4 open-collector outputs?
The pull-up resistor value depends on the supply voltage, load current requirements, and switching speed. A typical starting point for 5 V TTL systems is between 1 kΩ and 10 kΩ. Lower resistance values allow faster rise times and support heavier loads, but increase power consumption. Higher values reduce power draw but slow the output rise time. The specific value should be calculated based on the required I_OL of 8 mA maximum and the total capacitive load, including the specified 15 pF load capacitance in the datasheet.
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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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