MC14541BCPG

Programmable Timers And Oscillators Overview

The MC14541BCPG is a programmable timer IC manufactured by onsemi, housed in a 16-pin PDIP package. It integrates a 16-stage binary counter, an RC oscillator, and power-on reset logic. The device operates within a supply voltage range of 3.0 Vdc to 18 Vdc. Key electrical parameters include a maximum input frequency of 3 MHz, a quiescent current of 15 µA at 25 °C, and output drive capabilities of up to 19.3 mA sink and -16.3 mA source. It supports temperature ranges from -55 °C to +125 °C.

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 Mode pins A and B.
• Includes a built-in low-power RC oscillator with external timing components (Rtc, Ctc) or bypass capability for external clock input.
• Features automatic power-on reset and independent external master reset functionality.
• Provides Q/Q select logic to define the initial output state 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 oscillator or external clock sources.
• Systems requiring automatic initialization upon power-up without manual intervention.

Programmable Timers And Oscillators Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status as manufacturing processes may vary. Check datasheet revision history for any discontinuation notices or pinout modifications prior to finalizing procurement specifications.

Programmable Timers And Oscillators Selection Notes

Select this component when a 16-bit programmable counter with integrated timing generation is required. Ensure the application voltage remains between 3 V and 18 V. Consider the PDIP-16 package constraints for thermal dissipation and PCB layout requirements compared to surface-mount alternatives.

Programmable Timers And Oscillators Part Context

This part belongs to the MC14541B family of programmable timers. It serves as a CMOS-based solution for timing control, distinct from TTL counterparts. The 'CPG' suffix indicates a specific plastic DIP packaging variant compliant with lead-free standards where applicable.

Programmable Timers And Oscillators Replacement Considerations

Compatible substitutes include CD4541BM and CD4541BMT from Texas Instruments. Verify pin compatibility and electrical characteristics against the original design requirements before substitution.

Programmable Timers And Oscillators FAQ

How is the oscillator frequency determined?

The oscillator frequency is set by external resistor Rtc and capacitor Ctc connected to pins 1 and 2. For frequencies between 1 kHz and 100 kHz, the relationship is approximately f = 1 / (2.3 * Rtc * Ctc).

What is the function of the Q/Q Select pin?

The Q/Q Select pin determines the initial logic level of the Q output after a reset. Setting it high results in a high output initially, while setting it low results in a low output initially.

Can the internal oscillator be bypassed?

Yes, an external clock signal can be applied directly to Pin 3 (Clock Input), allowing the internal RC oscillator to be bypassed for higher accuracy or synchronization needs.