SN74LS147N3 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74LS147N3 is a 10-to-4 line priority encoder from Texas Instruments in the LS logic family, encoding ten active-low inputs into a 4-bit BCD output with priority resolution. It features 15pF load capacitance specification and is packaged in a 16-pin plastic DIP for easy through-hole integration. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS147N3 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
- 10-to-4 line priority encoder implementing BCD output encoding for decimal keypad and input priority arbitration circuits
- LS-family TTL logic with 15pF load capacitance for reliable operation in standard 5V digital systems
- 16-pin PDIP package in plastic/epoxy construction enabling straightforward through-hole PCB assembly and prototyping
Applications
The SN74LS147N3 is commonly used in keyboard encoding circuits, decimal-to-BCD conversion, and input priority arbitration systems in industrial control and embedded digital logic designs. It simplifies the interface between multiple active-low input lines and a microcontroller or display decoder by automatically encoding the highest-priority active input. The through-hole DIP package makes it well suited for prototyping, educational lab kits, and legacy industrial equipment maintenance.
Specifications
| YTEOL | 0 |
| Family | LS |
| JESD-30 Code | R-PDIP-T16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | ENCODER |
| Number of Bits | 10 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Power Supply Current-Max (ICC) | 20mA |
| Propagation Delay (tpd) | 33ns |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| ## SN74LS147N3 Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS147N3:
Frequently Asked Questions
What does the SN74LS147N3 do?
The SN74LS147N3 is a 10-to-4 line priority encoder that converts ten active-low input lines into a 4-bit BCD output. When multiple inputs are active simultaneously, it resolves priority by encoding the highest-order active input, making it ideal for keyboard encoding and input arbitration in digital logic systems.
What logic family does the SN74LS147N3 belong to?
The SN74LS147N3 belongs to the LS (Low-power Schottky) TTL logic family, which operates at 5V supply and provides a good balance of switching speed and power consumption for standard digital logic applications in industrial and educational electronics.
What package does the SN74LS147N3 use?
The SN74LS147N3 is housed in a 16-pin PDIP (Plastic Dual-In-Line Package) with 0.3-inch row spacing (DIP16,.3), made of plastic/epoxy material. This through-hole package is widely compatible with standard breadboards and PCB through-hole footprints used in prototyping and legacy system repairs.
What is the load capacitance specification for the SN74LS147N3?
The SN74LS147N3 is specified with a load capacitance of 15pF, which defines the output drive capability under standard test conditions. Staying within this capacitance limit on PCB traces ensures reliable timing and switching performance consistent with LS-family TTL specifications.
What are typical applications for the SN74LS147N3?
Typical applications include decimal keypad encoding (converting 10-key decimal input to 4-bit BCD), priority interrupt controllers, multiplexer address encoding, and BCD display drivers in industrial control panels, embedded systems, and educational digital logic laboratory exercises.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”