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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74ABT |
| 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 | 32mA, 64mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 24-SSOP (0.209", 5.30mm Width) |
| Supplier Device Package | 24-SSOP |
| ROHS |  |
The SN74ABT543ADB from Texas Instruments is an 8-bit non-inverting transceiver with 3-state outputs, part of the 74ABT BiCMOS logic family. It operates from 4.5V to 5.5V, offering 32mA source and 64mA sink current for high-drive applications. The bidirectional capability and direction control make it ideal for data bus interfacing in microprocessor systems. Packaged in a 24-SSOP, it is suited for industrial controls, telecom, and memory interfacing.
- High Drive Current (32mA/64mA): Drives heavy capacitive loads and long traces reliably.
- Bidirectional Transceiver: Simplifies data bus design with direction control.
- 3-State Outputs: Enables bus sharing and prevents contention in multi-device systems.
- 74ABT BiCMOS Technology: Combines high speed with low power consumption.
Bidirectional Data Bus for Microprocessors
As a transceiver, it allows data to flow in both directions on a bus. The 3-state outputs and direction control make it perfect for connecting a CPU to memory or peripherals.
High-Current Line Driving
With 64mA sink capability, it can drive long cables or multiple loads. This is useful in backplane systems where signal attenuation must be overcome.
Level-Shifting Between 5V Systems
While not a level shifter, it provides robust buffering between 5V logic blocks. The high drive current ensures clean signals even with parasitic capacitance.
Industrial Control Bus Isolation
In PLCs and industrial controllers, this transceiver buffers communication buses (e.g., parallel interfaces) between control boards and I/O modules, with the temperature range covering factory environments.
Memory Bank Selection
Use the 3-state outputs to enable or disable memory banks. The direction control allows read/write operations, making it ideal for SRAM or EEPROM interfacing.
Telecom Switching Matrices
In telecom equipment, bidirectional transceivers route data between switching cores and line cards. The high drive current maintains signal integrity over PCB traces.
- Q: What logic family is the SN74ABT543ADB?
- A: It belongs to the 74ABT family, known for high-speed BiCMOS performance at 5V.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel (8-bit), enabling bidirectional data flow.
- Q: What type of output does it have?
- A: It has 3-state outputs, allowing the bus to be released when not in use.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, suitable for standard 5V logic systems.
- Q: What is the output current capability?
- A: It can source 32mA and sink 64mA, providing strong drive for heavy loads.
- Q: What package is available?
- A: It comes in a 24-SSOP package (5.30mm width), ideal for space-constrained designs.
SN74ABT543ADB.pdf
- Q: What logic family is the SN74ABT543ADB?
- A: It belongs to the 74ABT family, known for high-speed BiCMOS performance at 5V.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel (8-bit), enabling bidirectional data flow.
- Q: What type of output does it have?
- A: It has 3-state outputs, allowing the bus to be released when not in use.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, suitable for standard 5V logic systems.
- Q: What is the output current capability?
- A: It can source 32mA and sink 64mA, providing strong drive for heavy loads.
- Q: What package is available?
- A: It comes in a 24-SSOP package (5.30mm width), ideal for space-constrained designs.