CD4521 belongs to 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4521 has a 24-Stage Frequency Divider
CD4521 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.
CD4521 Features
- Reset disabies the RC oscillator for low-power standby condition
- Voo’ and Vss’ pins are brought out from the crystal oscillator to allow use of external resistors for ow-power operation
- 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
CD4521 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
CD4521 Pinout Diagram
CD4521 Pin Description
| Pin No | Pin Name | Description |
| 1 | Q24 | Frequency Divider Output Q24 |
| 2 | RESET | Reset Pin |
| 3 | VSS’ | Invert Supply Voltage |
| 4 | OUT 2 | Output Pin 2 |
| 5 | VDD’ | Invert Drain Voltage |
| 6 | IN 2 | Input Pin 2 |
| 7 | OUT 1 | Output Pin 1 |
| 8 | VSS | Supply Voltage |
| 9 | IN 1 | Input Pin 1 |
| 10 | Q18 | Frequency Divider Output Q18 |
| 11 | Q19 | Frequency Divider Output Q19 |
| 12 | Q20 | Frequency Divider Output Q20 |
| 13 | Q21 | Frequency Divider Output Q21 |
| 14 | Q22 | Frequency Divider Output Q22 |
| 15 | Q23 | Frequency Divider Output Q23 |
| 16 | VDD | Drain Voltage |
CD4521 Circuit
Applications
- Frequency Synthesizers
- Audio Equipment
- Radar and Satellite Communication
- Military Equipment
CD4521 Alternative Equivalent
Download CD4521 24-Stage Frequency Divider Datasheet from the link given below.
