CD4008 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4008 has a 4-bit binary full adder
CD4008 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.
CD4008 Features
- High-Voltage Type (20V Rating)
- 4 Sum Outputs Plus Parallel Look-ahead Carry-Output
- High-Speed Operation – Sum In-To-Sum Out, 160ns
- Typ; Carry In-To-Carry Out, 5ns Typ. At VDD = 10V,CL=50pF
- Standardized Symmetrical Output Characteristics
- 100% Tested For Quiescent Current At 20V
- 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 = 15
- 5V, 10V and 15V Parametric Ratings
CD4008 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
CD4008 Pinout Diagram
CD4008 Pin Description
| Pin No | Pin Name | Description |
| 1 | A4 | The input of Adder A4 |
| 2 | B3 | The input of Adder B3 |
| 3 | A3 | The input of Adder A3 |
| 4 | B2 | The input of Adder B2 |
| 5 | A2 | The input of Adder A2 |
| 6 | B1 | The input of Adder B1 |
| 7 | A1 | The input of Adder A1 |
| 8 | VSS | Supply Voltage |
| 9 | C1 | Carry IN Pin |
| 10 | S1 | Sum of Adder S1 |
| 11 | S2 | Sum of Adder S2 |
| 12 | S3 | Sum of Adder S3 |
| 13 | S4 | Sum of Adder S4 |
| 14 | C0 | CARRY OUT Pin |
| 15 | B4 | The input of Adder B4 |
| 16 | VDD | Drain Voltage |
CD4008 Circuit
Applications
- Ripple Carry Adder
CD4008 Alternative Equivalent
Download Datasheet CD4008 4-bit binary full adder from the link given below.
