SN74LS03DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74LS03DG4 is a quad 2-input NAND gate from Texas Instruments' 74LS logic family with open-collector outputs rated at 8 mA sink current and a 15 pF load capacitance. It integrates four independent NAND functions in a 14-pin SOIC package operating on a 4.75 V to 5.25 V supply. The device suits bus driving, wired-AND signal combining, and level-shifting logic applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS03DG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LS03DG4?
- Quad 2-input NAND gate with open-collector outputs
- 8 mA maximum output low sink current per gate
- 14-pin SOIC package (JEDEC R-PDSO-G14)
- 15 pF rated load capacitance for standard bus lines
- 74LS family logic levels compatible with 5 V TTL systems
- Four independent gates for flexible signal routing
- Open-collector outputs enable wired-AND connections without external logic
What is SN74LS03DG4 used for?
The SN74LS03DG4 is used in 5 V TTL digital systems where wired-AND bus structures allow multiple open-collector outputs to share a single pull-up resistor, reducing gate count. It serves as a basic building block in address decoders, interrupt request arbitration circuits, and bidirectional bus level-shifting interfaces. Legacy industrial control boards, test equipment, and embedded systems that require LS-family drive strength also rely on this device for signal inversion and combination tasks.
What are the specifications of SN74LS03DG4?
| 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 |
| 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 |
Where can I find the SN74LS03DG4 datasheet?
SN74LS03DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS03DG4?
Compatible alternatives and drop-in replacements for SN74LS03DG4:
Frequently Asked Questions
What output type does the SN74LS03DG4 use, and how does it differ from a totem-pole NAND gate?
The SN74LS03DG4 uses open-collector outputs rather than totem-pole outputs. Open-collector outputs require an external pull-up resistor, typically 1 kΩ to 10 kΩ connected to the 5 V rail, and allow multiple gate outputs to be wire-AND connected on a single net. This configuration is not possible with standard totem-pole outputs, making the LS03 useful for bus arbitration and interrupt wiring where several drivers share one line.
How much current can each output of the SN74LS03DG4 sink when driving a low logic level?
Each open-collector output of the SN74LS03DG4 sinks up to 8 mA in the low state. This current capacity allows the device to pull down standard TTL logic loads and small indicator LEDs connected via a current-limiting resistor. The 8 mA rating is sufficient for driving one standard 74LS input with a typical 0.4 mA load per input, leaving margin for additional fan-out.
Which supply voltage range is required to ensure correct logic levels for the SN74LS03DG4?
The SN74LS03DG4 operates from a 4.75 V to 5.25 V supply voltage, conforming to the standard 5 V TTL specification. Voltages below 4.75 V may degrade noise margins and increase propagation delay, while voltages above 5.25 V can exceed the maximum rating and damage the device. A stable 5 V regulated supply with a 100 nF bypass capacitor placed within 10 mm of the VCC pin is recommended.
For a compact PCB design, how does the 14-pin SOIC footprint of the SN74LS03DG4 compare to a DIP-14 alternative?
The 14-pin SOIC package (R-PDSO-G14) measures approximately 8.65 mm × 3.9 mm with a 1.27 mm lead pitch, compared to the DIP-14's roughly 19 mm × 6.35 mm body with 2.54 mm pitch. The SOIC version occupies about 75% less board area, enabling higher component density on SMT assemblies while maintaining the same four NAND gate functions and 5 V TTL compatibility.
Can the SN74LS03DG4 be used to create a level-shifting interface between 5 V TTL and 3.3 V logic?
Yes. By connecting the open-collector pull-up resistor to a 3.3 V rail instead of 5 V, the SN74LS03DG4 outputs swing between 0 V and 3.3 V while still accepting 5 V TTL input levels. This technique translates logic levels from a 5 V source to 3.3 V CMOS devices. The output low level remains below 0.4 V with 8 mA sink capability, satisfying 3.3 V CMOS input thresholds of approximately 0.8 V for logic low.
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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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