PIC18F2455

Features:

• USB V2.0 Compliant
• Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)
• Supports Control, Interrupt, Isochronous and Bulk Transfers
• Supports up to 32 endpoints (16 bidirectional)
• 1-Kbyte dual access RAM for USB
• On-chip USB transceiver with on-chip voltage regulator
• Interface for off-chip USB transceiver
• Streaming Parallel Port (SPP) for USB streaming transfers (40/44-pin devices only)

Pinout






Specifications

Parameter Name	Value
Program Memory Type	Flash
Program Memory (KB)	24
CPU Speed (MIPS)	12
RAM Bytes	2,048
Data EEPROM (bytes)	256
Digital Communication Peripherals	1-A/E/USART, 1-MSSP(SPI/I2C)
Capture/Compare/PWM Peripherals	2 CCP
Timers	1 x 8-bit, 3 x 16-bit
ADC	10 ch, 10-bit
Comparators	2
USB (ch, speed, compliance)	1, Full Speed, USB 2.0
Temperature Range (C)	-40 to 85
Operating Voltage Range (V)	2 to 5.5
Pin Count	28

Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................. .-40°C to +85°C
Storage temperature .............................................................................. -65°C to +150°C
Voltage on any pin with respect to V_SS (except V_DD,MCLR and RA4)..-0.3V to (V_DD + 0.3V)
Voltage on V_DD with respect to V_SS .............................................................. -0.3V to +7.5V
Voltage onMCLR with respect to V_SS (Note 2) ............................................... 0V to +13.25V
Total power dissipation (Note 1) ....................................................................................1.0W
Maximum current out of V_SS pin .................................................................................300 mA
Maximum current into V_DD pin .....................................................................................250 mA
Input clamp current, I_IK (V_I < 0 or V_I > V_DD)............................................................. ±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_DD) ....................................................... ±20 mA
Maximum output current sunk by any I/O pin................................................................25 mA
Maximum output current sourced by any I/O pin ..........................................................25 mA
Maximum current sunk by all ports ..............................................................................200 mA
Maximum current sourced by all ports ..........................................................................200 mA

Note 1: Power dissipation is calculated as follows:
Pdis = V_DD x {I_DD I_OH} + {(V_DD V_OH) x I_OH} + (V_OL x I_OL)
2: Voltage spikes below VSS at the MCLR/VPP/RE3 pin, inducing currents greater than 80 mA, may cause latch-up. Thus, a series resistor of 50-100 should be used when applying a "low" level to the MCLR/V_PP/ RE3 pin, rather than pulling this pin directly to V_SS.

† NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Description

Ideal for low power (nanoWatt) and connectivity applications that benefit from the availability of three serial ports: FS-USB(12 Mbit/s), I2C? and SPI? (up to 10 Mbit/s) and an asynchronous (LIN capable) serial port (EUSART). Large amounts of RAM memory for buffering and Enhanced FLASH program memory make it ideal for embedded control and monitoring applications that require periodic connection with a (legacy free) Personal Computer via USB for data upload/download and/or firmware updates.While operating up to 48 MHz, the PIC18F2455 is also mostly software and hardware compatible with the PIC16C745 Low-Speed USB OTP devices.
USB Application Design Center