SN7445NS Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN7445NS is a BCD-to-decimal decoder/driver IC from Texas Instruments, providing full decoding of 4-bit BCD input to 10 active-low outputs with open-collector drivers capable of sinking up to 80 mA. It operates on a 5V supply and is compatible with standard TTL logic families. Available in a 16-pin DIP package, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN7445NS Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- BCD-to-decimal decoder with full decoding of all 4-bit BCD input combinations to 10 active-low outputs
- High-current open-collector outputs capable of sinking up to 80 mA per output for direct LED and lamp driving
- TTL-compatible inputs ensuring seamless integration with 7400-series and other 5V TTL logic devices
- 16-pin DIP through-hole package for easy prototyping on breadboards and legacy system maintenance
Applications
The SN7445NS is commonly used in display systems to drive seven-segment displays, LED arrays, and indicator lamps directly from BCD-encoded digital outputs. It is found in legacy industrial control panels, numeric display circuits, and test equipment where decimal readout of binary-coded data is required. Its high-current output capability makes it particularly valuable in driving loads that standard TTL gates cannot handle directly.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the function of the SN7445NS?
The SN7445NS is a BCD-to-decimal decoder and driver that converts a 4-bit binary-coded decimal (BCD) input into one of 10 active-low output signals. Each output corresponds to a decimal digit from 0 to 9, enabling direct interface with decimal display elements and indicator devices.
How much current can the SN7445NS output drivers sink?
The SN7445NS open-collector output drivers can sink up to 80 mA per output, far exceeding the typical 16 mA capability of standard TTL logic gates. This high current drive capability allows it to directly power LEDs, incandescent lamps, and relay coils without additional buffer transistors.
What package is the SN7445NS available in?
The SN7445NS is packaged in a 16-pin dual-in-line (DIP) through-hole package, which is compatible with standard IC sockets and breadboards. This packaging makes it ideal for prototyping, repair of legacy equipment, and educational use in digital logic circuit experiments.
Is the SN7445NS compatible with CMOS or only TTL logic?
The SN7445NS is designed for TTL logic levels and operates from a 5V supply, making it directly compatible with other 74xx-series TTL devices. While it may interface with 5V CMOS devices in some configurations, its input thresholds are optimized for TTL, so CMOS interfacing should be verified for specific voltage levels.
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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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