HEF4541BT,118

Programmable Timers And Oscillators Overview

The HEF4541BT,118 is a programmable timer manufactured by Nexperia in an SO14 (SOT108-1) plastic 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 V to 15 V. External components RTC and CTC set the oscillator frequency between 1 Hz and 100 kHz. The counter divides the frequency by 2^8, 2^10, 2^13, or 2^16 based on address inputs A0 and A1. Propagation delay from RS to O ranges from 75 ns to 1150 ns depending on load capacitance and division ratio.

Programmable Timers And Oscillators Feature Summary

• CMOS technology with low power dissipation and high noise immunity
• Wide supply voltage range: 3.0 V to 15.0 V
• Integrated 16-stage binary counter with selectable division ratios
• ESD protection: HBM > 2000 V, CDM > 1000 V

Programmable Timers And Oscillators Applications

• Programmable timing circuits
• Frequency dividers
• Clock generation systems

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix '118' corresponds to the tape and reel packaging format as defined in the manufacturer's catalog. Confirm that the component meets the required ambient temperature operating range of -40 °C to +125 °C for the intended application environment before finalizing procurement.

Programmable Timers And Oscillators Selection Notes

Select this component when a single-chip solution for programmable timing and frequency division is required. Ensure external timing components RTC and CTC are chosen to maintain the oscillator frequency within the 1 Hz to 100 kHz range. Verify that the maximum clock frequency at input RS does not exceed the limits specified for the selected supply voltage.

Programmable Timers And Oscillators Part Context

The HEF4541BT,118 belongs to the HEF4541B family of programmable timers. The 'BT' designation indicates the SO14 surface-mount package, while ',118' specifies the standard tape and reel packaging configuration used for automated assembly processes.

Programmable Timers And Oscillators Replacement Considerations

Direct replacement requires matching the SO14 package and pinout. Alternative sources must verify compatibility with the 3 V to 15 V supply range and the specific propagation delay characteristics under identical load conditions.