Overview
The SN74ABT126DBR, 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 when the associated output-enable (OE) input is low. The SN74ABT126DBR is designed to operate over a wide range of supply voltages and temperatures, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage Range (VCC) | 4.5 | 5.5 | V |
| Input Voltage Range (VI) | 0 | VCC | V |
| Operating Free-Air Temperature (TA) | -40 | 85 | °C |
| High-Level Input Voltage (VIH) | 2 | 2 | V |
| Low-Level Input Voltage (VIL) | 0.8 | 0.8 | V |
| High-Level Output Current (IOH) | -24 | -32 | mA |
| Low-Level Output Current (IOL) | 48 | 64 | mA |
| Propagation Delay Time (tPLH, tPHL) | 1 | 7.3 | ns |
Key Features
- Independent line drivers with 3-state outputs.
- Each output can be disabled by setting the associated output-enable (OE) input low.
- High-impedance state during power-up or power-down when VCC is between 0 and 2.1 V.
- Requires a pulldown resistor on OE to ensure high-impedance state above 2.1 V.
- Wide range of package options including SSOP, SOIC, SOP, TSSOP, and VQFN.
- Operates over a temperature range of -40°C to 85°C.
Applications
- Digital bus systems requiring buffering and isolation.
- Memory and peripheral interfaces.
- Data transmission and reception circuits.
- General-purpose digital logic circuits.
- Systems needing 3-state output control for bus management.
Q & A
- What is the primary function of the SN74ABT126DBR?
The primary function is to act as a quadruple bus buffer gate with 3-state outputs, allowing independent line drivers to buffer and isolate digital signals.
- How do you disable the output of the SN74ABT126DBR?
The output can be disabled by setting the associated output-enable (OE) input low.
- What is the operating temperature range of the SN74ABT126DBR?
The device operates over a temperature range of -40°C to 85°C.
- What are the package options available for the SN74ABT126DBR?
The device is available in SSOP, SOIC, SOP, TSSOP, and VQFN packages.
- What is the purpose of the pulldown resistor on the OE input?
The pulldown resistor ensures the high-impedance state of the output above 2.1 V during power-up or power-down.
- What are the maximum and minimum supply voltage ranges for the SN74ABT126DBR?
The supply voltage range is from 4.5 V to 5.5 V.
- What are the high-level and low-level output currents for the SN74ABT126DBR?
The high-level output current (IOH) is -24 mA to -32 mA, and the low-level output current (IOL) is 48 mA to 64 mA.
- What is the propagation delay time for the SN74ABT126DBR?
The propagation delay time (tPLH, tPHL) ranges from 1 ns to 7.3 ns.
- In what types of systems is the SN74ABT126DBR typically used?
The device is typically used in digital bus systems, memory and peripheral interfaces, data transmission and reception circuits, and general-purpose digital logic circuits.
- Why is it important to hold unused inputs at VCC or GND?
Holding unused inputs at VCC or GND ensures proper device operation and prevents unintended behavior due to floating inputs.
