CD4541BE

Overview

The CD4541BE is a high-voltage CMOS programmable timer circuit manufactured by Texas Instruments. It integrates a 16-stage binary counter, an RC-controlled oscillator, automatic power-on reset logic, and output control within a single 14-pin PDIP package. The device operates on a supply voltage range of 3V to 18V and supports a wide operating temperature range from -55°C to 125°C. Key electrical specifications include a maximum propagation delay of 18,000 ns at 5V, a static current of 0.1 mA at 20V, and output drive capabilities of ±12.6 mA. The oscillator frequency extends from DC to 100 kHz.

Feature Summary

• Integrates a 16-stage binary counter with an external RC oscillator for precise timing control
• Features automatic power-on reset circuitry to ensure defined initial states upon activation
• Supports multiple output modes including monostable, astable, and divide-by-2^N configurations via the MODE pin
• Provides robust output drive capability with low symmetric output resistance (±12.6 mA)

Applications

• Fan speed controllers simulating natural wind patterns through intermittent operation cycles
• Long-duration delay timers capable of extending delays for tens of hours or days via cascading
• Bedside lamp circuits providing automatic shut-off after a preset reading duration

Procurement Notes

Verify component authenticity against Texas Instruments manufacturing standards. Confirm RoHS compliance status as indicated in official datasheets. Ensure the PDIP-14 package dimensions match design requirements, specifically noting the 19.3mm length and 4.57mm height. Validate that the selected supplier provides traceable documentation for the active lifecycle status.

Selection Notes

Select the CD4541BE when a single-channel programmable timer with high-voltage tolerance is required. The 16-bit counter depth allows for extensive timing ranges without external division. Consider the 14-pin DIP footprint for through-hole prototyping or legacy board designs. Ensure external RC components are rated for the specific temperature range of -55°C to 125°C to maintain timing accuracy across operational extremes.

Part Context

The CD4541BE belongs to the CD4000B series of high-voltage CMOS digital logic devices. This family is characterized by broad supply voltage compatibility and low power consumption. The BE suffix typically denotes the standard plastic dual in-line package variant produced by Texas Instruments for general-purpose industrial and commercial applications.

Replacement Considerations

Cross-reference with other CD4541 variants such as CD4541BM (SOIC package) for surface-mount requirements. Verify pinout compatibility before substituting with generic CMOS timer ICs, as internal logic definitions may differ. Ensure replacement parts meet the same -55°C to 125°C temperature rating if used in harsh environments.