PIC18F4458-I/P - 8-bit 48MHz USB MCU 24KB Flash | Microchip
MPN: PIC18F4458-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.87 | $7.87 |
| 10 | $7.09 | $70.90 |
| 100 | $5.94 | $594.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.62 | $4,620.00 |
PIC18F4458-I/P Overview
Background: An 8-bit microcontroller (MCU) is a single-chip computer optimized for byte-oriented control tasks in embedded systems. Within the MCU taxonomy, PIC18F devices sit above base-line PIC16 parts, providing enhanced 16-bit wide instruction paths, hardware multiplier, C-friendly architecture, and richer peripherals while retaining the classic PIC RISC design. The PIC18F4458 belongs to the PIC18F4550 family of Full-Speed USB microcontrollers, distinguished from PIC18F-K-series parts by its USB SIE and nanoWatt features aimed at connected, battery-aware products.
Key differentiating features include a USB 2.0 Full-Speed (12 Mbit/s) Serial Interface Engine, three independent serial ports (USB, I2C, SPI up to 10 Mbit/s), an EUSART for asynchronous/synchronous RS-232/RS-485 communications, a 10-channel 12-bit ADC, two analog comparators, and a hardware master/slave PSP. The device supports operating voltages of 2.0V to 5.5V and provides self-programmability for bootloader firmware updates.
The architecture combines a Harvard RISC core with a 16-bit instruction word and 8-bit data path, an 8 x 8 hardware multiplier for math acceleration, and a 31-level hardware stack that supports high-level language compilers (MPLAB C18). nanoWatt features include multiple idle/sleep modes, ultra-low-power wake-up on change, and a real-time clock with dedicated low-power oscillator.
Typical applications include Full-Speed USB peripherals (HID, CDC, vendor-class), industrial sensor hubs, low-power data loggers, and embedded control nodes requiring USB connectivity. Design considerations include provision for a 20 MHz external crystal when USB accuracy is required, decoupling on AVDD/VUSB rails, and MCLR pull-up for reliable reset behavior.
Drop-in alternatives for PIC18F4458-I/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F4458-I/P (same form factor and footprint) — differing in Core, Operating Temperature, Package, Timers, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F4550-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4455-I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC18F4450-I/P
✅ Drop-In✓ In Stock
$6.05 / Unit
View Datasheet →PIC18F4420-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4320-I/P
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC18F4458-I/P Maximum Ratings & Electrical Characteristics
| Core | PIC18F 8-bit Harvard RISC |
| Instruction Set Width | 16-bit |
| Data Path | 8-bit |
| Max CPU Frequency | 48 MHz |
| Program Memory (Flash) | 24 KB (12K x 16 words) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| I/O Pins | 34 (40-pin PDIP) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| ADC | 10-channel, 12-bit |
| USB | USB 2.0 Full-Speed (12 Mbit/s) SIE |
| Serial Interfaces | USB, EUSART, I2C, SPI (up to 10 Mbit/s) |
| Comparators | 2 analog comparators |
| Timers | 1 x 8-bit, 3 x 16-bit |
| Package | 40-pin PDIP (0.600", 15.24 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +85C (Industrial, -I suffix) |
| Programming | ICSP via PGC/PGD, self-programmable |
| RoHS Status | Compliant |
PIC18F4458-I/P Pin Configuration
| Pin 1 | RB0/INT0/FLT0/AN12 — PORTB bit 0, external interrupt 0, ECCP fault input, analog input 12 |
| Pin 2 | RB1/INT1/AN10 — PORTB bit 1, external interrupt 1, analog input 10 |
| Pin 3 | RB2/INT2/AN8 — PORTB bit 2, external interrupt 2, analog input 8 |
| Pin 4 | RB3/AN9/CCP2 — PORTB bit 3, analog input 9, ECCP2 capture/compare/PWM |
| Pin 5 | RB4/AN11/KBI0 — PORTB bit 4, analog input 11, interrupt-on-change |
| Pin 6 | RB5/KBI1/PGM — PORTB bit 5, interrupt-on-change, low-voltage ICSP |
| Pin 7 | RB6/KBI2/PGC — PORTB bit 6, interrupt-on-change, ICSP clock |
| Pin 8 | RB7/KBI3/PGD — PORTB bit 7, interrupt-on-change, ICSP data |
| Pin 9 | VSS — Logic ground |
| Pin 10 | VDD — Logic power supply (2.0V to 5.5V) |
| Pin 11 | VSS — Logic ground (return pair for VDD) |
| Pin 12 | RA0/AN0 — PORTA bit 0, analog input 0 |
| Pin 13 | RA1/AN1 — PORTA bit 1, analog input 1 |
| Pin 14 | RA2/AN2/VREF- — PORTA bit 2, analog input 2, ADC VREF- |
| Pin 15 | RA3/AN3/VREF+ — PORTA bit 3, analog input 3, ADC VREF+ |
| Pin 16 | RA4/T0CKI/C1OUT — PORTA bit 4, Timer0 clock input, comparator 1 output |
| Pin 17 | RA5/AN4/SS1/HLVDIN/C2OUT — PORTA bit 5, analog input 4, SPI1 slave select, HLVD input, comparator 2 output |
| Pin 18 | RC0/T1OSO/T1CKI — PORTC bit 0, Timer1 oscillator output, Timer1 clock input |
| Pin 19 | RC1/T1OSI/CCP2/UOE — PORTC bit 1, Timer1 oscillator input, ECCP2, USB OE |
| Pin 20 | RC2/CCP1/P1A — PORTC bit 2, ECCP1, PWM output A |
| Pin 21 | RC4/D-/VM — PORTC bit 4, USB D-, USB VM monitor |
| Pin 22 | RC5/D+/VP — PORTC bit 5, USB D+, USB VP monitor |
| Pin 23 | RC6/TX1/CK1 — PORTC bit 6, EUSART1 TX, EUSART1 clock |
| Pin 24 | RC7/RX1/DT1 — PORTC bit 7, EUSART1 RX, EUSART1 data |
| Pin 25 | RD0/SPP0 — PORTD bit 0, Streaming Parallel Port data 0 |
| Pin 26 | RD1/SPP1 — PORTD bit 1, Streaming Parallel Port data 1 |
| Pin 27 | RD2/SPP2 — PORTD bit 2, Streaming Parallel Port data 2 |
| Pin 28 | RD3/SPP3 — PORTD bit 3, Streaming Parallel Port data 3 |
| Pin 29 | RD4/SPP4 — PORTD bit 4, Streaming Parallel Port data 4 |
| Pin 30 | RD5/SPP5/P1B — PORTD bit 5, Streaming Parallel Port data 5, PWM output B |
| Pin 31 | RD6/SPP6/P1C — PORTD bit 6, Streaming Parallel Port data 6, PWM output C |
| Pin 32 | RD7/SPP7/P1D — PORTD bit 7, Streaming Parallel Port data 7, PWM output D |
| Pin 33 | VUSB — USB internal 3.3V regulator output (bypass cap required) |
| Pin 34 | AVDD — Analog power supply |
| Pin 35 | AVSS — Analog ground |
| Pin 36 | RE0/RD/AN5 — PORTE bit 0, Parallel Slave Port read, analog input 5 |
| Pin 37 | RE1/WR/AN6 — PORTE bit 1, Parallel Slave Port write, analog input 6 |
| Pin 38 | RE2/CS/AN7 — PORTE bit 2, Parallel Slave Port chip select, analog input 7 |
| Pin 39 | OSC1/CLKI/RA7 — External crystal input, external clock input, PORTA bit 7 |
| Pin 40 | OSC2/CLKO/RA6 — External crystal output, clock output, PORTA bit 6 |
Typical Applications
PIC18F4458-I/P is suitable for 6 applications: Full-Speed USB HID Peripherals, USB CDC Virtual COM Port Bridge, Industrial Sensor Hub with USB Logging, Embedded Bootloader / Field-Upgradable Appliance, Low-Power Data Logger with USB Dump, USB Educational Development Board.
Full-Speed USB HID Peripherals
The PIC18F4458-I/P is ideal for Full-Speed USB HID peripherals such as keyboards, mice, game controllers, and custom input devices because its integrated USB 2.0 SIE handles 12 Mbit/s framing without an external PHY. With 24 KB Flash and 2 KB SRAM, the device comfortably fits the HID bootloader, HID descriptor table, and a small matrix-scan or vendor report handler. Its 48 MHz core provides the throughput to maintain 1000 Hz polling while servicing ADC and GPIO scan in parallel.
Recommended
USB CDC Virtual COM Port Bridge
The PIC18F4458-I/P excels in USB CDC virtual COM port bridges used to replace legacy RS-232 ports on embedded systems, because the integrated USB SIE and EUSART can run concurrently. Its 48 MHz core and 2 KB SRAM sustain full-duplex USB-to-UART throughput without dropped bytes, while the 12-bit ADC enables the bridge to also report supply voltage or temperature over the same CDC interface. Engineers can re-use the same firmware skeleton for both USB and serial-only products, simply commenting out the USB stack for the latter.
Recommended
Industrial Sensor Hub with USB Logging
For industrial sensor hubs that stream ADC readings to a host PC, the PIC18F4458-I/P combines a 10-channel 12-bit ADC with USB CDC for plug-and-play data logging. Its 48 MHz core runs background averaging while the USB endpoint delivers 1 kHz report streams, and its nanoWatt sleep modes drop the quiescent current below 1 uA when the host is offline. The 40-pin PDIP package simplifies through-hole assembly in ruggedized industrial enclosures and provides ample I/O for I2C, SPI, and analog sensor multiplexing.
Recommended
Embedded Bootloader / Field-Upgradable Appliance
The PIC18F4458-I/P supports bootloader-based field upgrades via ICSP and self-programmable Flash, allowing products to receive firmware updates over USB from a host PC without opening the enclosure. Its 24 KB Flash reserves 8 KB for the bootloader while leaving 16 KB for application code, and the 2 KB SRAM supports modular firmware loading. The 40-pin PDIP package is convenient for both prototype development with through-hole headers and small-batch production.
Recommended
Low-Power Data Logger with USB Dump
The PIC18F4458-I/P suits battery-powered data loggers that wake periodically, sample sensors, store to EEPROM, and dump logs to a USB host on demand. Its nanoWatt sleep modes cut quiescent current to under 1 uA, the 256-byte EEPROM holds configuration and calibration, and the USB SIE enables instant log retrieval without removing the SD card. Engineers can extend the design with an external I2C FRAM for high-density logging while the PIC handles USB and timing.
Recommended
USB Educational Development Board
The PIC18F4458-I/P is a strong choice for USB-focused educational development boards because the 40-pin PDIP form factor fits standard solderless breadboards and through-hole perfboard, removing the need for soldering reflow equipment. Its full USB stack plus 12-bit ADC and three serial ports give students a complete peripheral set to learn embedded protocols. Microchip's MPLAB X IDE and XC8 compiler are free, lowering the educational adoption cost.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F4458-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F4550-I/P | PIC18F4455-I/P | PIC18F4450-I/P | PIC18F4420-I/P | PIC18F4320-I/P |
|---|---|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 24 KB | 32 KB | 24 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1.5 KB | 768 B | 512 B |
| USB SIE | USB 2.0 Full-Speed (12 Mbit/s) | USB 2.0 Full-Speed (12 Mbit/s) | USB 2.0 Full-Speed (12 Mbit/s) device-only | USB 2.0 Full-Speed (12 Mbit/s) | No USB | No USB |
| ADC Resolution | 12-bit, 10-channel | 12-bit, 13-channel | 12-bit, 10-channel | 10-bit, 8-channel | 10-bit, 8-channel | 10-bit, 8-channel |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
Key Differentiators
- Integrated USB 2.0 Full-Speed SIE without external PHY (vs PIC18F4320-I/P)
- Higher-resolution 12-bit ADC vs 10-bit siblings (vs PIC18F4450-I/P)
- 24 KB Flash balances bootloader and application code (vs PIC18F4550-I/P)
Design Notes
USB signaling on PIC18F4458 requires a 48 MHz clock with sufficient accuracy; using the internal HF-INTOSC with the active clock tuning against the USB SOF packets is acceptable but a 20 MHz external crystal with HSPLL is recommended for jitter-sensitive hosts. Decoupling the VUSB pin with a 220 nF capacitor and placing VUSB near a regulated 5V source is mandatory - omitting it causes USB enumeration failures.
For USB operation the part requires VDD >= 4.0V (per USB 2.0 spec); at lower voltages USB must be disabled in firmware. For non-USB applications the part operates from 2.0V to 5.5V. nanoWatt sleep currents drop below 1 uA when the system clock is gated and peripherals disabled, but peripherals connected to I/O pins must be tri-stated to prevent leakage through protection diodes.
Place a 100 nF decoupling capacitor on each VDD/AVDD pair within 3 mm of the pins, and add a bulk 10 uF tantalum or ceramic near the IC. The 40-pin PDIP package has long leads that introduce inductive loops at high current transients; star-ground VSS, AVSS, and USB ground returns to a single point. MCLR should pull up through a 10 kohm resistor to VDD for reliable reset unless programming through ICSP is the primary mode.
Compliance Information
RoHS and lead-free compliant per Microchip product page; not AEC-Q100 qualified (consumer/industrial grade).
