CD4541BF3A

Overview

The CD4541BF3A is a high-voltage CMOS programmable timer housed in a 14-lead ceramic dual in-line (CERDIP) 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 3V to 20V and supports a temperature range of -55°C to 125°C. It functions as a 2^N frequency divider or a single-transition timer, with selectable output stages at counts of 8, 10, 13, or 16.

Feature Summary

• Built-in low-power RC oscillator with frequency range from DC to 100kHz
• 16-stage binary counter with selectable outputs at 2^8, 2^10, 2^13, or 2^16 stages
• Automatic power-on reset circuit for reliable initialization
• Hermetically sealed CERDIP package suitable for harsh environments

Applications

• Digital timing circuits requiring precise pulse counting
• Frequency division applications using external clock inputs
• Single-transition timers triggered by master reset pulses
• Military and defense systems utilizing hermetic packaging

Procurement Notes

Verify the complete part number CD4541BF3A when ordering, as suffixes denote specific package types and materials. Confirm that the CERDIP package meets environmental requirements, noting it is not RoHS compliant compared to plastic variants. Ensure design accounts for the non-RoHS lead finish (SNPB) during assembly processes.

Selection Notes

Select this component over plastic packages when hermetic sealing is required for radiation or moisture resistance. The CERDIP package offers higher thermal stability but differs in physical dimensions from PDIP or SOIC versions. Verify that the 20V rating aligns with system voltage constraints, as standard plastic versions may have different ratings.

Part Context

This device belongs to the CD4541B family of CMOS programmable timers. The 'F' suffix specifically identifies the 14-lead ceramic dual in-line package (CERDIP), distinguishing it from plastic DIP (PDIP), small outline (SOIC), or thin shrink small outline (TSSOP) variants within the same functional family.

Replacement Considerations

CD4541BE provides identical functionality in a plastic PDIP package. CD4541BM offers the same electrical characteristics in a surface-mount SOIC package. Substituting these requires adapting the PCB footprint and verifying if hermetic sealing is strictly necessary for the application.