SN74LS145NSR-P Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS145NSR-P is a BCD-to-decimal decoder/driver IC by Texas Instruments in a 16-pin SOIC package, decoding a 4-bit BCD input to one of ten active-low outputs. Key specs: LS TTL family, open-collector outputs, 5V supply. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS145NSR-P Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- BCD-to-decimal (1-of-10) decoder with open-collector outputs, enabling direct driving of displays, relays, and indicator LEDs without additional buffers
- Low-power Schottky TTL (LS) logic family ensures fast switching with reduced power dissipation compared to standard TTL
- 16-pin SOIC package for surface-mount assembly, compatible with high-density PCB layouts and automated SMT manufacturing
Applications
The SN74LS145NSR-P is used in BCD-to-decimal decoding applications such as seven-segment display driving, decimal counter outputs, and keyboard encoding in industrial and consumer electronics. Its open-collector outputs allow direct connection to LED indicators, relays, and optocouplers in control panel and automation systems. It is also applied in legacy digital systems requiring TTL-compatible BCD decoding with active-low output selection.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS145NSR-P:
Frequently Asked Questions
What does the SN74LS145NSR-P do?
The SN74LS145NSR-P is a BCD-to-decimal decoder that accepts a 4-bit binary-coded decimal input and activates one of ten mutually exclusive active-low open-collector outputs, making it suitable for driving decimal displays and selection circuits.
What package is the SN74LS145NSR-P available in?
The SN74LS145NSR-P is housed in a 16-pin small outline integrated circuit (SOIC) package, which is a surface-mount format that reduces board space compared to through-hole DIP packages and is compatible with automated SMT assembly lines.
What logic family does the SN74LS145NSR-P belong to?
The SN74LS145NSR-P belongs to the Low-power Schottky TTL (74LS) logic family, which offers faster switching speeds and lower power consumption than standard TTL, operating at a 5V supply voltage with standard TTL-compatible input/output levels.
What are the open-collector outputs used for in the SN74LS145NSR-P?
The open-collector outputs of the SN74LS145NSR-P allow it to directly drive high-voltage or high-current loads such as LEDs, relays, lamps, and optocouplers, as well as to implement wired-AND logic when multiple outputs are connected together.
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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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