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| PartNumber | Z8F0421PH020EG | Z8F0421PH020EC | Z8F0421PH020SC |
| Description | 8-bit Microcontrollers - MCU 4K FLASH w/1K RAM 1 UART XTEMP | IC MCU 8BIT 4KB FLASH 20DIP | IC MCU 8BIT 4KB FLASH 20DIP |
| Manufacturer | ZiLOG | - | - |
| Product Category | 8-bit Microcontrollers - MCU | - | - |
| RoHS | Y | - | - |
| Mounting Style | Through Hole | - | - |
| Package / Case | PDIP-20 | - | - |
| Series | Z8F042 | - | - |
| Core | eZ8 | - | - |
| Data Bus Width | 8 bit | - | - |
| Maximum Clock Frequency | 20 MHz | - | - |
| Program Memory Size | 4 kB | - | - |
| Data RAM Size | 1 kB | - | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 11 I/O | - | - |
| Operating Supply Voltage | 2.7 V to 3.6 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 105 C | - | - |
| Packaging | Tube | - | - |
| Height | 3.68 mm | - | - |
| Length | 26.92 mm | - | - |
| Program Memory Type | Flash | - | - |
| Width | 6.65 mm | - | - |
| Brand | ZiLOG | - | - |
| Data ROM Type | Flash | - | - |
| Interface Type | I2C, UART | - | - |
| Number of ADC Channels | 2 | - | - |
| Number of Timers/Counters | 2 Timer | - | - |
| Processor Series | Z8F042xx | - | - |
| Product Type | 8-bit Microcontrollers - MCU | - | - |
| Factory Pack Quantity | 18 | - | - |
| Subcategory | Microcontrollers - MCU | - | - |
| Supply Voltage Max | 3.6 V | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Unit Weight | 0.079719 oz | - | - |