DM74LS123N

Multivibrators Overview

The DM74LS123N is a dual retriggerable monostable multivibrator manufactured by onsemi, housed in a 16-lead Plastic Dual-In-Line Package (PDIP). It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of 0 °C to +70 °C. The device features two independent circuits with complementary outputs (Q and Q-bar) and three inputs per circuit: active-LOW transition trigger (A), active-HIGH transition trigger (B), and Clear (CLR). Key electrical characteristics include a low-level output current of 8 mA, a high-level output current of -0.4 mA, and propagation delays ranging from 33 ns to 56 ns depending on the input path.

Multivibrators Feature Summary

• Dual retriggerable monostable multivibrator architecture allowing pulse generation up to 100% duty cycle
• Flexible triggering options via active-LOW or active-HIGH transition inputs
• Complementary outputs available for each independent circuit
• Internal compensation for supply voltage and temperature variations

Multivibrators Applications

• Pulse width modulation and timing control circuits
• Debouncing switches and eliminating contact bounce
• Frequency division and pulse stretching applications

Multivibrators Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence. Confirm package integrity and pin alignment against the 16-lead PDIP specification before integration. Ensure external timing components meet leakage and capacitance requirements to maintain accurate pulse widths. Check for RoHS compliance status if required by specific manufacturing standards.

Multivibrators Selection Notes

Select this component when dual independent one-shot functionality is required in a standard DIP package. Consider the LS logic family compatibility with existing TTL/DTL systems. Evaluate external resistor and capacitor values to achieve desired pulse widths, noting that large time constants may require specific capacitor types. Verify that the 8 mA sink capability meets load requirements.

Multivibrators Part Context

This device belongs to the 74LS series of logic integrated circuits, designed for low-power Schottky applications. It is functionally equivalent to other manufacturers' dual retriggerable one-shots but is specifically packaged in the N16E PDIP format. The DM74LS123N provides a robust solution for timing applications requiring precise pulse generation and retriggering capabilities within industrial temperature ranges.

Multivibrators Replacement Considerations

Direct substitutes include SN74LS123N from Texas Instruments. Other compatible alternatives may exist within the 74LS123 family from different vendors, provided they match the 16-pin PDIP footprint and electrical specifications.