CD40257 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40257 has Quad 2-line to 1-line data selector/multiplexer
CD40257 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.
CD40257 Features
- 3-States Outputs
- 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
CD40257 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
CD40257 Pinout Diagram
CD40257 Pin Description
| Pin No | Pin Name | Description |
| 1 | INPUT SELECT | Input Select Pin |
| 2 | A1 | Input 1 Of Multiplexer 1 |
| 3 | B1 | Input 2 Of Multiplexer 1 |
| 4 | D1 | Input 3 Of Multiplexer 1 |
| 5 | A2 | Input 1 Of Multiplexer 2 |
| 6 | B2 | Input 2 Of Multiplexer 2 |
| 7 | D2 | Input 3 Of Multiplexer 2 |
| 8 | VSS | Supply Voltage |
| 9 | D3 | Input 3 Of Multiplexer 3 |
| 10 | B3 | Input 2 Of Multiplexer 3 |
| 11 | A3 | Input 1 Of Multiplexer 3 |
| 12 | D4 | Input 3 Of Multiplexer 4 |
| 13 | B4 | Input 2 Of Multiplexer 4 |
| 14 | A4 | Input 1 Of Multiplexer 4 |
| 15 | OUTPUT DISABLE | Output Disable Pin |
| 16 | VDD | Drain Voltage |
CD40257 Circuit
Applications
- Digital Multiplexing
- Shiftright/shift-left registers
- True/complement selection
CD40257 Alternative Equivalent
Download CD40257-Quad 2-line to 1-line data selector/multiplexer Datasheet from the link given below.
