Texas Instruments SN74LS645NSR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $2.24 | $2.24 |
| 15+ | $2.17 | $32.55 |
| 25+ | $2.12 | $53.00 |
| 50+ | $2.01 | $100.50 |
| 100+ | $1.77 | $177.00 |
| N+ | $0.35 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74LS |
| Packaging | Marketplace | Cut Tape (CT) |
| 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 | 15mA, 24mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 20-SO |
| ROHS |  |
The SN74LS645NSR is a non-inverting transceiver from Texas Instruments, part of the 74LS low-power Schottky TTL family. It operates from 4.75V to 5.25V and features 3-State outputs for bus sharing. With a sink current of 15mA and source current of 24mA, it can drive standard TTL loads. The 20-SOIC package is compact for PCB designs. This transceiver is ideal for 5V bus systems, microprocessor interfacing, and industrial control applications.
- Low-Power Schottky (74LS): Provides good speed with lower power consumption than standard TTL.
- 3-State Outputs: Enables safe bus sharing in multi-device systems.
- Non-Inverting Transceiver: Simplifies bidirectional data flow without signal inversion.
- Standard 5V Operation: Compatible with legacy TTL systems.
5V TTL Bus Systems
Use the SN74LS645NSR in classic 5V TTL systems for bidirectional bus communication. Its 3-State outputs prevent bus contention.
Microprocessor Interfacing
In older microprocessor designs, it buffers data between the CPU and memory. The non-inverting function maintains data integrity.
Industrial Control Panels
In industrial PLCs, it interfaces between logic controllers and I/O modules. The 74LS family is known for robustness.
Peripheral Device Communication
Use it to connect a microcontroller to peripherals like printers or keyboards. The 24mA source current drives standard TTL inputs.
Test Equipment
In benchtop instruments, it routes test signals. The 3-State outputs allow multiple instruments to share a common bus.
Legacy System Maintenance
For repairing or extending legacy 5V systems, this transceiver is a reliable choice. Its 0°C to 70°C range suits typical lab environments.
- Q: What logic family is the SN74LS645NSR?
- A: It belongs to the 74LS family, which is low-power Schottky TTL logic.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel, allowing bidirectional data transfer.
- Q: What is the output type?
- A: It has 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for TTL logic.
- Q: What is the package?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) package.
- Q: What are the output current ratings?
- A: It can sink 15mA and source 24mA, suitable for TTL-level loads.
SN74LS645NSR.pdf
- Q: What logic family is the SN74LS645NSR?
- A: It belongs to the 74LS family, which is low-power Schottky TTL logic.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel, allowing bidirectional data transfer.
- Q: What is the output type?
- A: It has 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for TTL logic.
- Q: What is the package?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) package.
- Q: What are the output current ratings?
- A: It can sink 15mA and source 24mA, suitable for TTL-level loads.
