Overview
The MC74AC373DWR2G, produced by onsemi, is an Octal Transparent Latch with 3-State Outputs. This component is part of the MC74AC373 and MC74ACT373 series, designed for bus-organized system applications. The device consists of eight D-type latches, each with 3-state outputs, allowing for flexible data handling and bus interfacing.
When the Latch Enable (LE) input is HIGH, the latches are transparent, meaning the output follows the input. When LE is LOW, the latches store the data present on the inputs, and the outputs can be set to a high impedance state using the Output Enable (OE) input.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC (Supply Voltage) | 2.0 to 6.0 | V | For 74AC series |
| VCC (Supply Voltage) | 4.5 to 5.5 | V | For 74ACT series |
| VIN (Input Voltage) | −0.5 to VCC + 0.5 | V | Referenced to GND |
| VOUT (Output Voltage) | −0.5 to VCC + 0.5 | V | Referenced to GND |
| IOH (Output Current - High) | −24 mA | mA | |
| IOL (Output Current - Low) | 24 mA | mA | |
| TJ (Junction Temperature) | −40 to 85 | °C | |
| ts (Setup Time, HIGH or LOW) | 2.0 to 6.0 | ns | Dn to LE |
| th (Hold Time, HIGH or LOW) | −3.0 to 1.0 | ns | Dn to LE |
| tw (LE Pulse Width, HIGH) | 4.0 to 6.0 | ns |
Key Features
- Eight latches in a single package for efficient data handling.
- 3-state outputs for bus interfacing, allowing outputs to be in a high impedance state.
- Outputs can source/sink up to 24 mA.
- The 74ACT373 version has TTL-compatible inputs.
- Pb-free devices, ensuring environmental compliance.
Applications
The MC74AC373DWR2G is suitable for various bus-organized system applications, including:
- Microprocessor and microcontroller systems.
- Data acquisition and processing systems.
- Communication and networking equipment.
- Industrial control systems.
- Any application requiring transparent latching and 3-state output control.
Q & A
- What is the primary function of the MC74AC373DWR2G?
The primary function is to act as an octal transparent latch with 3-state outputs, suitable for bus-organized system applications.
- How do the Latch Enable (LE) and Output Enable (OE) inputs control the device?
The LE input controls the latching of data, and the OE input controls whether the outputs are in a 2-state mode or high impedance state.
- What are the supply voltage ranges for the 74AC and 74ACT series?
The 74AC series operates from 2.0 to 6.0 V, while the 74ACT series operates from 4.5 to 5.5 V.
- What is the maximum output current for the MC74AC373DWR2G?
The outputs can source or sink up to 24 mA.
- Is the MC74AC373DWR2G Pb-free?
- What are the typical propagation delays for the MC74AC373DWR2G?
The propagation delays vary but are typically in the range of 7 to 15 ns depending on the voltage and conditions.
- What is the operating temperature range for the MC74AC373DWR2G?
The device operates over a temperature range of −40 to 85°C.
- What are some common applications for the MC74AC373DWR2G?
Common applications include microprocessor and microcontroller systems, data acquisition systems, communication equipment, and industrial control systems.
- How does the 74ACT version differ from the 74AC version?
The 74ACT version has TTL-compatible inputs, whereas the 74AC version does not.
- What is the maximum storage temperature for the MC74AC373DWR2G?
The maximum storage temperature is −65 to 150°C.
