Overview
The SN74123N is a dual retriggerable monostable multivibrator integrated circuit produced by Texas Instruments. This component is packaged in a 16-pin Plastic Dual In-Line Package (PDIP) and operates within a temperature range of 0 to 70°C. It is designed to generate output pulses with durations controlled by external resistance and capacitance values, making it versatile for various timing and pulse generation applications.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | PDIP (N) |
| Pins | 16 |
| Operating Temperature Range (°C) | 0 to 70 |
| Package Quantity | 25 (per tube) |
| RoHS Compliance | Yes |
Key Features
The SN74123N features several key functionalities that make it a robust and flexible component for timing and pulse generation:
- D-C Triggered from Active-High or Active-Low Gated Logic Inputs: The multivibrator can be triggered by either high or low logic levels, providing flexibility in circuit design.
- Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle: The output pulse duration can be extended by retriggering the inputs, allowing for pulses with up to 100% duty cycle.
- Overriding Clear Terminates Output Pulse: An overriding clear input can terminate the output pulse prematurely, providing control over the pulse duration.
- Internal Timing Resistors (for '122 and 'LS122): These models have internal timing resistors, allowing them to be used with only an external capacitor if desired.
- Schmitt Hysteresis for Jitter-Free Triggering: The 'LS122 and 'LS123 models have sufficient Schmitt hysteresis to ensure jitter-free triggering even with slow transition rates.
Applications
The SN74123N is suitable for a variety of applications where precise timing and pulse generation are required:
- Timing Circuits: It can be used to generate timing signals in digital circuits.
- Pulse Generation: For generating pulses of specific durations in electronic systems.
- Sequential Logic Circuits: In circuits where sequential logic operations are necessary.
- Signal Processing: For processing and manipulating digital signals.
Q & A
- What is the package type of the SN74123N?
The SN74123N is packaged in a 16-pin Plastic Dual In-Line Package (PDIP).
- What is the operating temperature range of the SN74123N?
The operating temperature range is from 0 to 70°C.
- Can the SN74123N be triggered by both high and low logic levels?
Yes, the SN74123N can be triggered by both active-high and active-low gated logic inputs.
- How can the output pulse duration be controlled in the SN74123N?
The output pulse duration can be controlled by selecting external resistance and capacitance values, and it can also be extended by retriggering the inputs or reduced by using the overriding clear.
- Does the SN74123N have internal timing resistors?
No, the SN74123N does not have internal timing resistors. However, the '122 and 'LS122 models do have internal timing resistors.
- What is the purpose of the overriding clear input in the SN74123N?
The overriding clear input can terminate the output pulse prematurely, providing control over the pulse duration.
- Is the SN74123N RoHS compliant?
Yes, the SN74123N is RoHS compliant.
- What are some common applications of the SN74123N?
The SN74123N is commonly used in timing circuits, pulse generation, sequential logic circuits, and signal processing.
- How many pins does the SN74123N have?
The SN74123N has 16 pins.
- What is the package quantity for the SN74123N?
The package quantity is 25 units per tube.
