SN74LS147D Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS147D is a Texas Instruments 9-to-4 line priority encoder from the LS logic family, accepting 9 active-low inputs and producing a BCD output in a 16-pin SOIC package. It prioritizes the highest active input line and provides encoded binary output for keypad scanning and interrupt arbitration. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS147D 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 SN74LS147D?
- 9-to-4 line priority encoding with active-low inputs and BCD output enables single-chip keyboard row encoding for up to 9 discrete input lines
- 15 pF load capacitance and LS-family switching speeds support standard 5 V TTL system integration with wide compatibility across legacy and new digital logic designs
- 16-pin SOIC (SOP16) package simplifies board-level assembly and allows direct replacement of DIP-16 designs with a smaller surface-mount footprint
What is SN74LS147D used for?
The SN74LS147D is used in keyboard matrix encoder circuits, priority interrupt controllers, and decimal-to-BCD conversion applications where 9 discrete input signals must be reduced to a 4-bit binary code for microcontroller or processor input. Industrial control panels with multiple pushbutton inputs rely on this device to prioritize and encode operator commands into a compact BCD format. Legacy 5 V TTL systems performing binary-coded decimal arithmetic also incorporate this encoder to interface analog switch banks or mechanical keyboard arrays.
What are the specifications of SN74LS147D?
| YTEOL | 0 |
| Additional Feature | 9 TO 4 LINE PRIORITY ENCODER |
| Family | LS |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | ENCODER |
| Number of Bits | 9 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 20mA |
| Propagation Delay (tpd) | 33ns |
| Qualification Status | Not Qualified |
| 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 Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74LS147D datasheet?
SN74LS147D Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS147D?
Compatible alternatives and drop-in replacements for SN74LS147D:
Frequently Asked Questions
Which designs are a good fit for SN74LS147D with 15 pF?
SN74LS147D fits industrial, embedded, and repair-oriented electronic assemblies when the design needs 15 pF and 16 pins. It is a practical choice when the BOM also matches the 16-pin SOIC footprint.
How should engineers check package compatibility for SN74LS147D?
Compare the PCB land pattern, height allowance, and assembly process against the 16-pin SOIC style. The 16 pins detail is the first check before approving a replacement.
What matters when sourcing SN74LS147D as a replacement?
Confirm the same 15 pF, 16 pins, manufacturer traceability, and lifecycle status before substituting it. Buyers should also verify stock for the exact 16-pin SOIC configuration.
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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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