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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74HC |
| Packaging | Bulk | |
| 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 | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V |
| 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 |
The SN74HC245APW from Texas Instruments is an octal non-inverting transceiver from the 74HC logic family. It provides bidirectional data transfer between two 8-bit buses with 3-state outputs, allowing for efficient bus isolation. Operating from 2V to 6V, it supports both 3.3V and 5V systems, with a 7.8mA output current capability. Housed in a 20-TSSOP package, it is ideal for space-conscious designs. Typical applications include memory interfacing, level shifting, and industrial control systems.
- Bidirectional Data Transfer: Enables flexible bus communication with a single IC, simplifying PCB design.
- Wide 2V to 6V Supply Range: Compatible with both 3.3V and 5V logic systems, reducing design complexity.
- 3-State Outputs: Allows for bus isolation and prevents data contention in multi-device systems.
- 8-Channel Capacity: Handles full byte-wide data buses in a single package.
- High-Speed CMOS Technology: Offers low power consumption while maintaining high-speed operation.
Bidirectional Bus Transceivers
The SN74HC245APW is designed for bidirectional data transfer between two buses, such as a microcontroller and memory or peripheral devices. The direction control pin (DIR) determines the data flow direction.
Memory Interfacing
In embedded systems, this transceiver can buffer address or data lines between a CPU and SRAM/Flash memory, ensuring signal integrity and preventing bus contention.
Level Shifting in Mixed-Voltage Systems
With its wide 2V-6V supply range, the SN74HC245APW can be used to shift signals between 3.3V and 5V logic domains, making it useful in mixed-voltage designs.
Peripheral Device Isolation
The 3-state outputs allow the transceiver to be placed in a high-impedance state, effectively isolating a peripheral device from the main bus during power-up or low-power modes.
Industrial Control Systems
In PLCs and industrial controllers, this IC can buffer parallel data lines between the main processor and I/O modules, providing robust signal driving over longer PCB traces.
Data Acquisition Systems
For multi-channel data acquisition, the transceiver can route data from multiple ADCs to a single microcontroller port, simplifying the PCB layout.
- Q: What is the logic family of the SN74HC245APW?
- A: It belongs to the 74HC (High-Speed CMOS) logic family, offering a balance of speed and low power consumption.
- Q: What is the function of this IC?
- A: It is an octal (8-bit) non-inverting transceiver, allowing bidirectional data flow between two buses.
- Q: How many channels does it have?
- A: It features 8 channels, making it ideal for parallel data bus applications.
- Q: What is the output type?
- A: The outputs are 3-State, enabling the device to be disconnected from the bus when not in use.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, providing flexibility for both 3.3V and 5V systems.
- Q: What package is available?
- A: It comes in a 20-TSSOP (0.173", 4.40mm Width) package, suitable for surface-mount designs.
SN74HC245APW.pdf
- Q: What is the logic family of the SN74HC245APW?
- A: It belongs to the 74HC (High-Speed CMOS) logic family, offering a balance of speed and low power consumption.
- Q: What is the function of this IC?
- A: It is an octal (8-bit) non-inverting transceiver, allowing bidirectional data flow between two buses.
- Q: How many channels does it have?
- A: It features 8 channels, making it ideal for parallel data bus applications.
- Q: What is the output type?
- A: The outputs are 3-State, enabling the device to be disconnected from the bus when not in use.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, providing flexibility for both 3.3V and 5V systems.
- Q: What package is available?
- A: It comes in a 20-TSSOP (0.173", 4.40mm Width) package, suitable for surface-mount designs.