SN74LS245DB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS245DB is an Octal Bus Transceiver with 3-State outputs from Texas Instruments, enabling bidirectional 8-bit data transfer between two buses. It operates on a 5 V supply in the LS TTL logic family with a Small Outline package. From $0.40 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS245DB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal bidirectional bus transceiver with 3-state outputs for noise-immune bus isolation
- Direction control pin enables easy switching between A-to-B and B-to-A data flow
- LS TTL logic family for compatibility with a wide range of 5 V TTL and CMOS devices
- Small Outline (SOP) package supports compact PCB layout in high-density digital designs
Applications
The SN74LS245DB is widely used as a bidirectional bus buffer in microprocessor systems, enabling data transfer between the CPU data bus and peripheral devices. Its 3-state outputs allow multiple transceivers to share a common bus without contention, making it ideal for memory interfaces, I/O expansion boards, and backplane bus drivers. It is commonly found in industrial controllers, legacy computer systems, and embedded data acquisition hardware.
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 SN74LS245DB and what is its primary function?
The SN74LS245DB is an Octal Bus Transceiver with 3-State outputs from Texas Instruments. It provides bidirectional 8-bit data transfer between two buses, with a direction control pin (DIR) to select data flow direction and an output enable pin (OE) for bus isolation using high-impedance 3-state outputs.
What logic family does the SN74LS245DB belong to?
The SN74LS245DB belongs to the LS (Low-Power Schottky) TTL logic family. This family is compatible with standard TTL and CMOS logic devices operating at 5 V, offering lower power consumption than standard TTL while maintaining TTL input and output voltage levels.
What package type does the SN74LS245DB use?
The SN74LS245DB is available in a Small Outline (SOP) surface-mount package. This package type is compatible with standard SMD assembly processes and is well-suited for high-density PCB designs in both industrial and consumer electronics.
How does the 3-state output benefit bus systems?
The 3-state (high-impedance) output of the SN74LS245DB allows the device to disconnect electrically from the bus when not selected, preventing bus contention when multiple devices share the same data lines. This is critical in microprocessor systems where multiple bus transceivers operate on a shared bidirectional data bus.
What are common applications for the SN74LS245DB?
Common applications include CPU-to-peripheral data bus buffering, memory bus interfaces, I/O port expansion, and backplane bus driving in industrial controllers and legacy computer hardware. Its bidirectional 8-bit structure is ideal for any application requiring reliable, buffered data transfer between separate digital subsystems.
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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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