Overview
The SN74ABT126DR, produced by Texas Instruments, is a quadruple bus buffer gate with 3-state outputs. This device features independent line drivers, each with a 3-state output that can be disabled by the associated output-enable (OE) input. When the OE input is low, the output is in a high-impedance state, making it suitable for bus applications where multiple devices need to share the same bus lines. The device operates over a wide temperature range of -40°C to 85°C and is available in a SOIC (D) package with 14 pins.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | V | 4.5 | 5.5 | |
| Input Voltage Range (VI) | V | -0.5 | 7 | |
| Output Voltage Range (VO) in High or Power-Off State | V | -0.5 | 5.5 | |
| Current into Any Output in Low State (IOL) | mA | 64 | ||
| High-Level Output Current (IOH) | mA | -32 | ||
| Operating Free-Air Temperature (TA) | °C | -40 | 85 | |
| Propagation Delay Time (tPLH, tPHL) | ns | 1 | 2.9-5.1 | 7.3 |
Key Features
- Independent line drivers with 3-state outputs.
- Each output can be disabled by the associated output-enable (OE) input.
- High-impedance state during power up or power down when VCC is between 0 and 2.1 V.
- Ensures high-impedance state above 2.1 V by tying OE to GND through a pulldown resistor.
- Wide operating temperature range: -40°C to 85°C.
- Available in various packages including SOIC (D), SSOP (DB), SOP (NS), TSSOP (PW), and VQFN (RGY).
Applications
- Bus systems where multiple devices share the same bus lines.
- Data transmission and reception in digital systems.
- Memory and peripheral interfaces.
- Industrial control systems requiring robust and reliable data transfer.
- Embedded systems and microcontrollers.
Q & A
- What is the primary function of the SN74ABT126DR?
The primary function is to act as a quadruple bus buffer gate with 3-state outputs, enabling independent line drivers to manage bus signals.
- How do the 3-state outputs work?
The outputs can be in one of three states: high, low, or high-impedance. The high-impedance state is achieved when the output-enable (OE) input is low.
- What is the operating temperature range of the SN74ABT126DR?
The device operates over a temperature range of -40°C to 85°C.
- What are the different packages available for the SN74ABT126DR?
The device is available in SOIC (D), SSOP (DB), SOP (NS), TSSOP (PW), and VQFN (RGY) packages.
- How is the high-impedance state ensured during power-up or power-down?
The high-impedance state is ensured by tying the OE input to GND through a pulldown resistor when VCC is above 2.1 V.
- What is the maximum current into any output in the low state?
The maximum current into any output in the low state is 64 mA.
- What is the propagation delay time for the SN74ABT126DR?
The propagation delay time (tPLH, tPHL) ranges from 1 ns to 7.3 ns.
- What are some common applications of the SN74ABT126DR?
Common applications include bus systems, data transmission and reception, memory and peripheral interfaces, industrial control systems, and embedded systems.
- How should unused inputs be handled to ensure proper device operation?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What is the recommended operating supply voltage range for the SN74ABT126DR?
The recommended operating supply voltage range is 4.5 V to 5.5 V.
