CD40161 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40161 has a Binary counter/asynchronous clear
CD40161 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.

CD40161 Features
- High-Voltage Types (20V Rating)
- CD40160BMS Decade with Asynchronous Clear
- CD40162BMS Decade with Synchronous Clear
- CD40163BMS Binary with Synchronous Clear
- Internal Look-Ahead for Fast Counting
- Carry Output for Cascading
- Synchronously Programmabl
- Standard Symmetrical Output Characteristics
- 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
CD40161 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
CD40161 Pinout Diagram

CD40161 Pin Description
Pin No | Pin Name | Description |
1 | CLEAR’ | Invert Clear Pin |
2 | CLOCK | Clock Pin |
3 | P1 | Data Input P1 |
4 | P2 | Data Input P2 |
5 | P3 | Data Input P3 |
6 | P4 | Data Input P4 |
7 | PE | Preset Enable |
8 | VSS | Supply Voltage |
9 | LOAD’ | Invert Load Pin |
10 | TE | Transition/Time Enable |
11 | Q4 | Data Output Q4 |
12 | Q3 | Data Output Q3 |
13 | Q2 | Data Output Q2 |
14 | Q1 | Data Output Q1 |
15 | CARRY-OUT | Carry-out Pin |
16 | VDD | Drain Voltage |
CD40161 Circuit
Applications
- Programmable Binary and Decade Counting
- Counter Control/Timers
- Frequency Dividing
CD40161 Alternative Equivalent
CD40160, CD40162, CD40163
Download CD40161-Binary counter/asynchronous clear Datasheet from the link given below.