| PartNumber | Z8F021APJ020SG2156 | Z8F021APJ020SC | Z8F021APJ020SG |
| Description | 8-bit Microcontrollers - MCU 2K FLASH 512B RAM | 8-bit Microcontrollers - MCU 2K FLASH 512B RAM | 8-bit Microcontrollers - MCU 2K FLASH 512B RAM |
| Manufacturer | ZiLOG | ZiLOG | ZiLOG |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | N | Y |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Package / Case | PDIP-28 | PDIP-28 | PDIP-28 |
| Series | Z8F0 | Z8F0 | Z8F0 |
| Core | eZ8 | eZ8 | eZ8 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 2 kB | 2 kB | 2 kB |
| Data RAM Size | 512 B | 512 B | 512 B |
| Number of I/Os | 25 I/O | 25 I/O | 25 I/O |
| Operating Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Program Memory Type | Flash | Flash | Flash |
| Brand | ZiLOG | ZiLOG | ZiLOG |
| Data RAM Type | RAM | - | - |
| Interface Type | IrDA, UART | UART | UART |
| Number of Timers/Counters | 3 Timer | 16 Timer | 2 Timer |
| Processor Series | Z8F021Ax | - | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 495 | 15 | 15 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Unit Weight | 0.147798 oz | 0.147798 oz | 0.147798 oz |
| ADC Resolution | - | No ADC | No ADC |
| Packaging | - | Tube | Tube |
| Height | - | 4.19 mm | 4.19 mm |
| Length | - | 37.34 mm | 37.34 mm |
| Width | - | 14.1 mm | 14.1 mm |
| Data ROM Size | - | 64 B | 64 B |
| Data ROM Type | - | Flash | Flash |
| Supply Voltage Max | - | 3.6 V | 3.6 V |
| Supply Voltage Min | - | 2.7 V | 2.7 V |