Overview
The SN74ALS374ADWR is an octal D-type edge-triggered flip-flop with 3-state outputs, produced by Texas Instruments. This device is part of the 74ALS series, known for its advanced low-power Schottky (ALS) technology. It is designed to operate over a temperature range of 0°C to 70°C, making it suitable for a variety of applications. The device features eight D-type flip-flops with a buffered output-enable (OE) input, allowing the outputs to be placed in either a normal logic state or a high-impedance state. This capability is particularly useful in bus-oriented systems where multiple devices need to share the same bus lines without significant loading or driving issues.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5 | 5.5 | V |
| VIH High-Level Input Voltage | 2 | V | ||
| VIL Low-Level Input Voltage | 0.7 | V | ||
| IOH High-Level Output Current | -1 | -2.6 | mA | |
| IOL Low-Level Output Current | 12 | 24 | mA | |
| TA Operating Free-Air Temperature | 0 | 70 | °C | |
| fclock Clock Frequency | 30 | 35 | MHz | |
| tsu Setup Time Data before CLK↑ | 10 | ns | ||
| th Hold Time Data after CLK↑ | 4 | ns | ||
| tPLH CLK to Q Propagation Delay | 3 | 14 | ns | |
| tPHL CLK to Q Propagation Delay | 5 | 17 | ns |
Key Features
- Octal D-type edge-triggered flip-flops with 3-state outputs.
- Buffered output-enable (OE) input to place outputs in high-impedance state.
- Advanced low-power Schottky (ALS) technology.
- Operating temperature range: 0°C to 70°C.
- High drive capability to drive bus lines without interface or pullup components.
- Internal operations of the flip-flops are not affected by the OE input.
- Supports expandable 4-word by 8-bit general file register and bidirectional data bus configurations.
Applications
- Bus-oriented systems where multiple devices share the same bus lines.
- General file registers and data storage applications.
- Bidirectional data bus drivers.
- Industrial control systems and automation.
- Embedded systems requiring edge-triggered flip-flops with 3-state outputs.
Q & A
- What is the operating temperature range of the SN74ALS374ADWR?
The operating temperature range is from 0°C to 70°C.
- What is the purpose of the buffered output-enable (OE) input?
The OE input allows the outputs to be placed in either a normal logic state or a high-impedance state, which is useful in bus-oriented systems.
- What is the maximum clock frequency for the SN74ALS374ADWR?
The maximum clock frequency is 35 MHz.
- What is the setup time for data before the clock rises?
The setup time is 10 ns.
- What is the hold time for data after the clock rises?
The hold time is 4 ns.
- What are the typical propagation delays for CLK to Q?
The typical propagation delays are 3 ns to 14 ns for tPLH and 5 ns to 17 ns for tPHL.
- Is the SN74ALS374ADWR still in production?
No, the SN74ALS374ADWR has been discontinued by Texas Instruments.
- What are some common applications for this device?
Common applications include bus-oriented systems, general file registers, bidirectional data bus drivers, and industrial control systems.
- What is the package type for the SN74ALS374ADWR?
The package type is SOIC (DW) with 20 pins.
- Does the device support partial-power-down mode operation?
No, this feature is not specified for the SN74ALS374ADWR. It is more relevant to devices like the SN74LV374A.
