CD4541 Oscillator/Programmable Timer


CD4541 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4541 has an Oscillator/Programmable Timer

CD4541 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD4541 Features

  • Low Symmetrical Output Resistance, Typically 100Ω at VDD = 15V
  • Built-In Low-Power RC Oscillator
  • Oscillator Frequency Range: DC to 100kHz
  • External Clock (Applied to Pin 3) can be Used Instead of Oscillator
  • Operates as 2N Frequency Divider or as a SingleTransition Timer
  • Standard Symmetrical Output Characteristics
  • 100% Tested for Maximum Quiescent Current at 20V
  • 5V, 10V, and 15V Parametric Ratings

CD4541 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +20V (Voltage Referenced to VSS Terminals)
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • DC Input Current, Any One Input: ±10mA
  • Operating Temperature Range: -55oC to +125oC Package Types D, F, K, H
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +265oC
    • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD4541 Pinout Diagram

CD4541 Pin Description

Pin NoPin NameDescription
3RSReset Pin
4NC No Connection
7VSSSupply Voltage
8OUTOutput Pin
9Q/Q’ SELECTLow/High Output Select Pin
10MODEMode Select Pin
11NCNo Connection
12AInput Pin A
13B Input Pin B
14VDDDrain Voltage

CD4541 Circuit


  • ON-Delay Operation.
  • OFF-Delay Operation.
  • Flicker Operation.
  • Interval Operation.

CD4541 Alternative Equivalent


Download CD4541 Oscillator/Programmable Timer Datasheet from the link given below.