CD40103-Presettable 8-bit binary down counter


CD40103 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40103 has a Presettable 8-bit binary down counter

CD40103 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.

CD40103 Features

  • High Voltage Type (20V Rating
  • CD40103BMS: 8-Bit Binary Type
  • Synchronous or Asynchronous Preset
  • Medium Speed Operation
    • fCL = 3.6MHz (Typ) at 10V
  • Cascadable
  • 100% Tested for Maximum Quiescent Current at 20V
  • 5V, 10V, and 15V Parametric Ratings
  • Maximum Input Current of 1μA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC
  • Noise Margin (Over Full Package Temperature Range):
    • 1V at VDD = 5V
    • 2V at VDD = 10V
    • 2.5V at VDD = 15V

CD40103 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

CD40103 Pinout Diagram

CD40103 Pin Description

Pin NoPin NameDescription
1CLKClock Pin
2CLEAR’Invert Clear Pin
3(CARRY-IN)’Invert Carry-Input Pin
4J0Output Bit 1 Of Counter
5J1 Output Bit 2 Of Counter
6J2 Output Bit 3 Of Counter
7J3 Output Bit 4 Of Counter
8VSSSupply Voltage
9(APE)’Invert Asynchronous Preset Enable Pin
10J4 Output Bit 5 Of Counter
11J5 Output Bit 6 Of Counter
12J6 Output Bit 7 Of Counter
13J7 Output Bit 8 Of Counter
14(ZERO DETECT)’Invert Carry-Out Detect Pin
15(SPE)’/CARRY-OUT’ Invert synchronous Preset Enable Pin
16VDDDrain Voltage

CD40103 Circuit


  • Divide-By- “N” Counters
  • Programmable Times
  • Interrupt Timers
  • Cycle/Program Counter

CD40103 Alternative Equivalent


Download CD40103-Presettable 8-bit binary down counter Datasheet from the link given below.