Overview
The 74AC11244PWR is an octal buffer or line driver produced by Texas Instruments, designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. This device can be used as two 4-bit buffers or one 8-bit buffer, featuring active-low output-enable (OE) inputs. When the OE input is low, the device passes noninverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state. The 74AC11244PWR is characterized for operation from –40°C to 85°C and is available in various package options, including TSSOP (Thin Shrink Small-Outline Package).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | - | 5.5 | V |
| High-Level Input Voltage (VIH) | 2.1 (VCC=3V) | - | 3.85 (VCC=5.5V) | V |
| Low-Level Input Voltage (VIL) | 0.9 (VCC=3V) | - | 1.65 (VCC=5.5V) | V |
| High-Level Output Current (IOH) | -24 | - | -50 | mA |
| Low-Level Output Current (IOL) | 12 | - | 24 | mA |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Propagation Delay Time (tPLH, tPHL) | 1.5 | 4.9-7.1 | 9.3-10.2 | ns (VCC=3.3V, VCC=5V) |
Key Features
- Flow-through architecture optimizes PCB layout.
- Center-pin VCC and GND pin configurations minimize high-speed switching noise.
- 500-mA typical latch-up immunity at 125°C.
- 3-state outputs drive bus lines or buffer memory address registers.
- Active-low output-enable (OE) inputs.
- Available in various package options including TSSOP, SSOP, and SOIC.
- Operates over a temperature range of –40°C to 85°C.
Applications
- Memory address drivers.
- Clock drivers.
- Bus-oriented receivers and transmitters.
- General-purpose buffering and driving applications.
Q & A
- What is the primary function of the 74AC11244PWR?
The 74AC11244PWR is an octal buffer or line driver designed to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
- What are the operating temperature ranges for the 74AC11244PWR?
The device operates from –40°C to 85°C.
- What are the different package options available for the 74AC11244PWR?
The device is available in TSSOP (Thin Shrink Small-Outline Package), SSOP (Shrink Small-Outline Package), and SOIC (Small Outline Integrated Circuit) packages.
- How does the output-enable (OE) input function?
When the OE input is low, the device passes noninverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state.
- What is the significance of the flow-through architecture in the 74AC11244PWR?
The flow-through architecture optimizes PCB layout by aligning the input and output pins, making it easier to design and layout the circuit board.
- What is the typical latch-up immunity of the 74AC11244PWR at 125°C?
The device has a 500-mA typical latch-up immunity at 125°C.
- What are the high-level and low-level output currents for the 74AC11244PWR?
The high-level output current (IOH) is -24 mA, and the low-level output current (IOL) is 24 mA.
- How do the center-pin VCC and GND configurations benefit the device?
The center-pin VCC and GND configurations minimize high-speed switching noise.
- What is the propagation delay time for the 74AC11244PWR?
The propagation delay time (tPLH, tPHL) ranges from 1.5 ns to 10.2 ns depending on the supply voltage.
- What are some common applications for the 74AC11244PWR?
The device is commonly used in memory address drivers, clock drivers, bus-oriented receivers and transmitters, and general-purpose buffering and driving applications.
