Specs side by side
2 parts compared · 14 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | - | 1.8V to 5.5V; 32KB flash and 2KB SRAM nominally, BUT there is no real EEPROM - EEPROM is emulated in flash and consumes program space (commonly 1KB allocated), leaving less usable flash than the ATmega. |
| Memory & Peripherals | - | Fuse bits do not exist: clock and boot configuration is done in software via the core. Libraries touching timers, EEPROM or low-level registers need adjustment. |
| Case | DIP-28 / TQFP-32 / QFN-32 | LQFP-32 / SSOP-20 / LQFP-48 |
| Compatibility Level | - | Functional Equivalent |
| Component Category | Embedded Microcontrollers (AVR) | - |
| Core & Architecture | - | A Chinese AVR-compatible MCU running to 32MHz off an internal RC oscillator (no crystal), reported about 20-30 percent faster than an ATmega328P at equal clock, plus extras the ATmega lacks: 12-bit ADC, a DAC, programmable gain amplifier and a factory GUID. |
| Firmware Notes | - | Not a binary-compatible drop-in: it requires the community LGT8fx core, and sketches using timers, EEPROM or register-level code need rework. This is a development-platform decision, not a repair substitution - fitting it where firmware expects a genuine ATmega328P signature and fuses will not work. |
| Hardware Notes | - | LQFP-32 boards exist that mirror the ATmega footprint, but verify the exact package and pin function against the board - the SSOP-20 and LQFP-48 variants are different layouts. |
| Lead Time Advantage | - | Shenzhen Spot Stock (24-48h Dispatch) |
| Market Reality | The ATmega328P is the Arduino-era workhorse that escaped into industry: thousands of instrument, controller and appliance boards still run it, and repair benches re-order it every week. Genuine Microchip supply continues, and the market knows it - which is why relabeled and re-marked stock circulates (the classic tell is a bootloader that reports one signature while the silicon reads another). The two real substitution questions are the ATmega328PB migration (a new device with the same socket, per Microchips own app note) and the smaller-flash siblings that share the pinout. | - |
| Reference Part | - | ATmega328P |
| Role In Circuit | Original Reference Part | - |
| Sourcing Advantage | - | Common on budget Nano-class boards in the Shenzhen market; useful to know what you are buying when a cheap board arrives with one fitted. |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | - |
Parts
- ATmega328P · microchip
- LGT8F328P · microchip