MC14541BFELG

Programmable Timers And Oscillators Overview

The MC14541BFELG is a programmable timer IC manufactured by onsemi, housed in a SOEIAJ-14 surface-mount package. It integrates a 16-stage binary counter, an RC oscillator, and automatic power-on reset logic. The device operates within a supply voltage range of 3.0 Vdc to 18 Vdc and supports a maximum clock frequency of 3 MHz. Key electrical parameters include a quiescent current of 15 µA at 10 V and a typical propagation delay of 1.25 µs from clock to the 2^10 output at 10 V. The component is marked as discontinued for new designs.

Programmable Timers And Oscillators Feature Summary

• Integrates a 16-stage binary counter with selectable outputs at stages 2^8, 2^10, 2^13, or 2^16 via address inputs A and B.
• Features a built-in low-power RC oscillator with external timing components, or allows bypassing for an external clock signal on Pin 3.
• Includes automatic power-on reset circuitry and an independent external master reset input (Pin 6).
• Provides Q/Q select functionality (Pin 9) to determine if the output is initially high or low following a reset condition.

Programmable Timers And Oscillators Applications

• Digital timer circuits requiring precise single-cycle or recycle mode operation.
• Frequency divider applications utilizing the internal counter stages.
• Systems requiring automatic initialization upon power-up without external reset logic.

Programmable Timers And Oscillators Procurement Notes

The MC14541BFELG is officially listed as discontinued in the datasheet revision history dated October 6, 2025. It is not recommended for new design implementations. Verification of current availability should be conducted directly with authorized distributors or onsemi representatives, as stock may be limited to existing inventory.

Programmable Timers And Oscillators Selection Notes

Designers should consider the operating temperature range of -55°C to +125°C when selecting this component for industrial environments. The choice between using the internal RC oscillator or an external clock depends on required frequency accuracy; the internal oscillator has specified tolerances of ±2% over temperature and ±20% over supply voltage. Ensure the load capacitance requirements are met to maintain switching characteristics within specified limits.

Programmable Timers And Oscillators Part Context

This part belongs to the MC14541B family of programmable timers. The 'F' suffix denotes the SOEIAJ-14 package type, while 'ELG' indicates specific packaging and lead-free compliance attributes. Other variants in the family include the DG (SOIC-14) and DT (TSSOP-14) suffixes, which share identical electrical specifications but differ in physical footprint and shipping quantities.

Programmable Timers And Oscillators Replacement Considerations

Public confirmed substitute part numbers: None identified in verified source material.