Texas Instruments SN74HCT645PW
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.59 | $1.59 |
| 15+ | $1.54 | $23.10 |
| 25+ | $1.50 | $37.50 |
| 50+ | $1.42 | $71.00 |
| 100+ | $1.25 | $125.00 |
| N+ | $0.25 | 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 | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 20-TSSOP |
| ROHS |  |
The SN74HCT645PW is a reliable octal bus transceiver from Texas Instruments, designed for bidirectional data communication in 5V systems. It features non-inverting 3-State outputs, enabling multiple devices to share a common data bus. Operating from 4.5V to 5.5V, it is fully TTL-compatible, making it easy to integrate with existing 5V logic. The 20-TSSOP package offers a compact footprint for space-limited designs. This IC is well-suited for microcontroller I/O expansion, data acquisition, and industrial control applications where robust and predictable performance is required.
- TTL-Compatible Inputs: Simplifies interfacing with legacy 5V TTL logic without additional components.
- 3-State Outputs: Enables safe bus sharing among multiple devices, reducing wiring complexity.
- Low Power CMOS Technology: Consumes less power than pure bipolar TTL, improving system efficiency.
- Wide Operating Temperature Range (-40°C to 85°C): Suitable for industrial environments.
TTL-Compatible Bus Interfacing
The SN74HCT645PW is ideal for interfacing between 5V CMOS and TTL logic systems. Its TTL-compatible inputs ensure direct connection to legacy TTL devices without extra level-shifting circuitry.
Microcontroller I/O Expansion
Use this transceiver to buffer and expand the I/O capabilities of a microcontroller. The 3-State outputs allow the MCU to share data lines with peripherals like ADCs, DACs, and memory.
Data Acquisition Systems
In DAQ systems, the HCT645 routes analog-to-digital converter outputs to a processor bus. Its low power consumption and high noise immunity make it suitable for precision measurement environments.
Industrial Control Logic
For industrial controllers, this IC provides a robust interface between the control logic and external sensors/actuators, handling 5V signals with reliable switching.
Peripheral Device Buffering
Connect printers, scanners, or other peripherals to a host system using this transceiver. It isolates the peripheral bus from the main system bus, preventing electrical damage.
Test Fixture Switching
In automated test equipment, the HCT645 can route test signals to different points on a device under test, using its 3-State outputs to enable/disable signal paths.
- Q: What logic family is the SN74HCT645PW?
- A: It is from the 74HCT family, which is TTL-compatible CMOS logic.
- Q: What is the function of this device?
- A: It is an octal bus transceiver with non-inverting outputs for bidirectional data transfer.
- Q: How many channels does it have?
- A: It has 1 channel with 8 bits, enabling 8-bit parallel data flow.
- Q: What is the output type?
- A: It has 3-State outputs, allowing multiple devices to share a bus safely.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, compatible with 5V TTL logic levels.
- Q: What package does it come in?
- A: It is available in a 20-TSSOP package (0.173", 4.40mm width).
SN74HCT645PW.pdf
- Q: What logic family is the SN74HCT645PW?
- A: It is from the 74HCT family, which is TTL-compatible CMOS logic.
- Q: What is the function of this device?
- A: It is an octal bus transceiver with non-inverting outputs for bidirectional data transfer.
- Q: How many channels does it have?
- A: It has 1 channel with 8 bits, enabling 8-bit parallel data flow.
- Q: What is the output type?
- A: It has 3-State outputs, allowing multiple devices to share a bus safely.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, compatible with 5V TTL logic levels.
- Q: What package does it come in?
- A: It is available in a 20-TSSOP package (0.173", 4.40mm width).
