| PartNumber | HCF4021BEY | HCF4021BM1 |
| Description | Counter Shift Registers 8-Stage Shift Reg | Counter Shift Registers 8-Stage Shift Reg |
| Manufacturer | STMicroelectronics | STMicroelectronics |
| Product Category | Counter Shift Registers | Counter Shift Registers |
| RoHS | Y | Y |
| Counting Sequence | Serial/Parallel to Parallel | Serial/Parallel to Parallel |
| Number of Circuits | 8 | 8 |
| Number of Bits | 8 bit | 8 bit |
| Package / Case | DIP-16 | SOP-16 |
| Logic Family | HCF40 | HCF40 |
| Logic Type | CMOS | CMOS |
| Number of Input Lines | 9 | 9 |
| Propagation Delay Time | 320 ns, 160 ns, 120 ns | 320 ns, 160 ns, 120 ns |
| Supply Voltage Max | 20 V | 20 V |
| Minimum Operating Temperature | - 55 C | - 55 C |
| Maximum Operating Temperature | + 125 C | + 125 C |
| Packaging | Tube | Tube |
| Function | Register | Register |
| Series | HCF4021 | HCF4021 |
| Width | 7.1 mm | 4 mm |
| Brand | STMicroelectronics | STMicroelectronics |
| Mounting Style | Through Hole | SMD/SMT |
| Number of Output Lines | 3 | 3 |
| Operating Supply Voltage | 3 V to 20 V | 3 V to 20 V |
| Product Type | Counter Shift Registers | Counter Shift Registers |
| Factory Pack Quantity | 25 | 50 |
| Subcategory | Logic ICs | Logic ICs |
| Unit Weight | 0.057419 oz | 0.008536 oz |