Texas Instruments SN74HCT645N
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $2.00 | $2.00 |
| 15+ | $1.94 | $29.10 |
| 25+ | $1.90 | $47.50 |
| 50+ | $1.79 | $89.50 |
| 100+ | $1.58 | $158.00 |
| N+ | $0.32 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74HCT |
| Packaging | Marketplace | Tube |
| Part Status | Active |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 6mA, 6mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PDIP |
| ROHS |  |
The SN74HCT645N is a non-inverting transceiver from Texas Instruments, part of the 74HCT logic family. It operates at 4.5V to 5.5V, ensuring compatibility with TTL logic levels. This 1-channel (8-bit) transceiver features 3-State outputs, capable of sourcing or sinking 6mA. The 20-DIP package is ideal for through-hole applications and prototyping. It provides bidirectional data transfer with direction and output enable controls, making it suitable for bus interfacing, memory systems, and industrial controls.
- TTL-Compatible Inputs: Directly interfaces with 5V TTL logic without level shifting.
- Bidirectional Operation: Allows data transfer in both directions, controlled by the DIR pin.
- 3-State Outputs: Enables bus sharing and prevents data contention.
- Through-Hole DIP Package: Easy to use in prototyping and legacy PCB designs.
TTL-Compatible Bus Transceiver
The SN74HCT645N is designed for 5V TTL systems. Its TTL-compatible inputs allow direct interfacing with legacy TTL logic without additional level shifting.
Bidirectional Data Bus for Microprocessors
Use this transceiver to connect a microprocessor to a bidirectional data bus. The DIR pin controls data direction, while the OE pin enables 3-State operation.
Through-Hole Prototyping
The 20-DIP package is ideal for breadboarding and through-hole PCB designs, making it easy to prototype and test bus interface circuits.
Industrial Control Systems
In industrial controllers, this transceiver can buffer and route data between a CPU and peripheral cards, operating reliably from -40°C to 85°C.
Memory Interfacing
Drive memory data lines with the SN74HCT645N, providing bidirectional communication between memory and controller.
Legacy System Upgrades
When upgrading older 5V systems, this transceiver maintains compatibility with existing TTL logic while providing robust buffering.
- Q: What logic family is the SN74HCT645N?
- A: It belongs to the 74HCT (High-Speed CMOS with TTL compatibility) logic family, operating at 4.5V to 5.5V.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel (8-bit), providing bidirectional data transfer.
- Q: What is the output type?
- A: It has 3-State outputs, allowing multiple devices to share a bus.
- Q: What is the output current capability?
- A: It can source or sink 6mA per output.
- Q: What is the operating voltage range?
- A: The supply voltage is 4.5V to 5.5V, making it TTL-compatible.
- Q: What package is available?
- A: It comes in a 20-DIP (0.300", 7.62mm) package, ideal for through-hole designs.
SN74HCT645N.pdf
- Q: What logic family is the SN74HCT645N?
- A: It belongs to the 74HCT (High-Speed CMOS with TTL compatibility) logic family, operating at 4.5V to 5.5V.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel (8-bit), providing bidirectional data transfer.
- Q: What is the output type?
- A: It has 3-State outputs, allowing multiple devices to share a bus.
- Q: What is the output current capability?
- A: It can source or sink 6mA per output.
- Q: What is the operating voltage range?
- A: The supply voltage is 4.5V to 5.5V, making it TTL-compatible.
- Q: What package is available?
- A: It comes in a 20-DIP (0.300", 7.62mm) package, ideal for through-hole designs.
