This is the datasheet of PIC18F2455/2550/4455/4550 published by Microchip Technology Inc., which introduces the features of the 28/40/44 pin high performance enhanced flash USB microcontrollers with the Nava technology.
The PIC18F2455/2550/4455/4550 family are high‑performance 8‑bit microcontrollers with enhanced flash memory and integrated USB 2.0 peripheral. They are offered in 28‑, 40‑ and 44‑pin packages and support both low‑speed (1.5 Mb/s) and full‑speed (12 Mb/s) USB operation.
The devices feature selectable internal oscillators (31 kHz – 8 MHz), up to 32 KB of program flash, 256 B of data EEPROM, 1 KB of dual‑port USB RAM, and a wide operating voltage range of 2.0 V – 5.5 V. Power‑management modes provide idle current of about 5.8 mA and sleep current as low as 0.1 mA. This manual is written in Chinese.
| Data EEPROM | 256 bytes |
|---|---|
| USB Dual‑Port RAM | 1 KB |
| Operating Voltage Range | 2.0 V – 5.5 V |
| Idle Current (typical) | 5.8 mA |
| Sleep Current (typical) | 0.1 mA |
| USB Speed Support | Low‑speed 1.5 Mb/s, Full‑speed 12 Mb/s |
| Pin Count Options | 28, 40, or 44 pins |
| Operating Temperature Range | -40 °C – +85 °C (industrial) / -40 °C – +125 °C (extended) |
They operate from 2.0 V up to 5.5 V.
Both low‑speed (1.5 Mb/s) and full‑speed (12 Mb/s) USB 2.0 are supported.
The family is offered in 28‑, 40‑ and 44‑pin packages.
Typical idle current is about 5.8 mA.