PIC18C858-I/PT - 8-bit 40MHz 32KB EPROM MCU w/ CAN | Microchip
MPN: PIC18C858-I/PT ✗ סוף ייצורPIC18C858-I/PT סקירה
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC18C family uses Microchip's enhanced 8-bit RISC architecture with C-compiler-optimized instruction set, linear program memory addressing up to 32 Kbytes, and linear data memory addressing up to 4 Kbytes, making it suitable for embedded control applications that need deterministic real-time response.
Key features of the PIC18C858-I/PT include a 10-bit Analog-to-Digital Converter (ADC) with multiple input channels, an integrated CAN 2.0B module for automotive and industrial networking, USART, MSSP (SPI/I2C), and capture/compare/PWM peripherals. Its 40MHz clock delivers up to 10 MIPS of processing throughput, and the 68 I/O pins give designers ample headroom for keypad, LCD, sensor, and actuator interfaces.
Architecturally, the PIC18C858 uses Harvard bus architecture with separate program and data paths, an 8-bit data path, and a 16-bit instruction word. This separation allows simultaneous instruction fetch and data access, eliminating the von Neumann bottleneck. The integrated CAN peripheral provides hardware message filtering and acceptance masks, freeing the CPU from bit-stuffing tasks.
Typical applications include industrial automation controllers, automotive body and chassis ECUs, CAN-based sensor networks, building automation gateways, and embedded control systems that benefit from the integrated CAN bus. The wide operating voltage range and industrial temperature grade also support process-control installations and HVAC controllers.
When designing with this device, remember that the PIC18C858 is built on EPROM (erasable programmable read-only memory) technology and is one-time programmable (OTP) in production. The part is marked Not Recommended for new designs by Microchip, so consider flash-based successors like the PIC18F8525 for new development. Engineers should verify the ICSP programming interface and oscillator startup timing during bring-up.
חלופות תחליף ישיר עבור PIC18C858-I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18C858-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Operating Temperature, ADC, Core Architecture, Program Memory Type.
PIC18C658-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F8525-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18C858T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18C858-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18C801-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18C858-I/PT דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | PIC 8-bit RISC |
| Core Clock Speed | 40 MHz (max) |
| Program Memory Type | EPROM (OTP) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1.5 KB |
| Data Memory Addressing | Up to 4 KB (linear) |
| I/O Pin Count | 68 |
| מתח אספקה | 4.2 V to 5.5 V |
| טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| מארז | 80-pin TQFP (PT) |
| סוג הרכבה | Surface Mount |
| ADC | 10-bit |
| CAN Module | Integrated CAN 2.0B |
| Peripherals | USART, MSSP (SPI/I2C), CCP/PWM |
תצורת פינים של PIC18C858-I/PT
| פין 1 | OSC1/CLKI — Oscillator input / external clock input |
| פין 2 | OSC2/CLKO — Oscillator output |
| פין 3 | MCLR/VPP — Master clear reset / programming voltage |
| פין 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| פין 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| פין 6 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| פין 7 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| פין 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| פין 9 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| פין 10 | VSS — Ground reference |
| פין 11 | VDD — Positive supply (4.2V-5.5V) |
| פין 12 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| פין 13 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| פין 14 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| פין 15 | RB3/INT3 — PORTB bit 3 / external interrupt 3 |
| פין 16 | RB4 — PORTB bit 4 |
| פין 17 | RB5 — PORTB bit 5 |
| פין 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| פין 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| פין 20 | VSS — Ground reference |
| פין 21 | VDD — Positive supply |
| פין 22 | RC0/T1CKI — PORTC bit 0 / Timer1 clock input |
| פין 23 | RC1/CCP2 — PORTC bit 1 / Capture/Compare/PWM 2 |
| פין 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| פין 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| פין 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| פין 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| פין 28 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| פין 29 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| פין 30 | RD0/PSP0 — PORTD bit 0 / parallel slave port data 0 |
| פין 31 | RD1/PSP1 — PORTD bit 1 / parallel slave port data 1 |
| פין 32 | RD2/PSP2 — PORTD bit 2 / parallel slave port data 2 |
| פין 33 | RD3/PSP3 — PORTD bit 3 / parallel slave port data 3 |
| פין 34 | RD4/PSP4 — PORTD bit 4 / parallel slave port data 4 |
| פין 35 | RD5/PSP5 — PORTD bit 5 / parallel slave port data 5 |
| פין 36 | RD6/PSP6 — PORTD bit 6 / parallel slave port data 6 |
| פין 37 | RD7/PSP7 — PORTD bit 7 / parallel slave port data 7 |
| פין 38 | VSS — Ground reference |
| פין 39 | VDD — Positive supply |
| פין 40 | RE0/RD — PORTE bit 0 / parallel slave port read |
| פין 41 | RE1/WR — PORTE bit 1 / parallel slave port write |
| פין 42 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| פין 43 | RF0 — PORTF bit 0 |
| פין 44 | RF1 — PORTF bit 1 |
| פין 45 | RF2 — PORTF bit 2 |
| פין 46 | RF3 — PORTF bit 3 |
| פין 47 | RF4 — PORTF bit 4 |
| פין 48 | RF5 — PORTF bit 5 |
| פין 49 | RF6 — PORTF bit 6 |
| פין 50 | RF7 — PORTF bit 7 |
| פין 51 | VSS — Ground reference |
| פין 52 | VDD — Positive supply |
| פין 53 | RG0 — PORTG bit 0 |
| פין 54 | RG1 — PORTG bit 1 |
| פין 55 | RG2 — PORTG bit 2 |
| פין 56 | RG3 — PORTG bit 3 |
| פין 57 | RG4 — PORTG bit 4 |
| פין 58 | AVDD — Analog positive supply |
| פין 59 | AVSS — Analog ground |
| פין 60 | CANTX — CAN bus transmit output |
| פין 61 | CANRX — CAN bus receive input |
| פין 62 | VSS — Ground reference |
| פין 63 | VDD — Positive supply |
| פין 64 | RH0 — PORTH bit 0 (external memory bus) |
| פין 65 | RH1 — PORTH bit 1 (external memory bus) |
| פין 66 | RH2 — PORTH bit 2 (external memory bus) |
| פין 67 | RH3 — PORTH bit 3 (external memory bus) |
| פין 68 | RH4 — PORTH bit 4 (external memory bus) |
| פין 69 | RH5 — PORTH bit 5 (external memory bus) |
| פין 70 | RH6 — PORTH bit 6 (external memory bus) |
| פין 71 | RH7 — PORTH bit 7 (external memory bus) |
| פין 72 | VSS — Ground reference |
| פין 73 | VDD — Positive supply |
| פין 74 | RJ0 — PORTJ bit 0 (external memory bus) |
| פין 75 | RJ1 — PORTJ bit 1 (external memory bus) |
| פין 76 | RJ2 — PORTJ bit 2 (external memory bus) |
| פין 77 | RJ3 — PORTJ bit 3 (external memory bus) |
| פין 78 | RJ4 — PORTJ bit 4 (external memory bus) |
| פין 79 | RJ5 — PORTJ bit 5 (external memory bus) |
| פין 80 | RJ6 — PORTJ bit 6 (external memory bus) |
יישומים טיפוסיים
PIC18C858-I/PT מתאים עבור 6 יישוםs: Industrial CAN Network Node, Automotive Body Control Module, Building Automation Gateway, Process Control Sensor Hub, HVAC Controller Board, Embedded CAN-to-Serial Bridge.
Industrial CAN Network Node
The PIC18C858-I/PT is purpose-built for industrial CAN network nodes thanks to its integrated CAN 2.0B module with hardware acceptance filtering. At 40MHz it delivers 10 MIPS, comfortably handling CAN 2.0B message processing at 1 Mbps alongside sensor sampling via the 10-bit ADC. The 68 I/O pins connect directly to digital sensors, opto-isolated inputs, and relay drivers typical of industrial control cabinets. Placed on a CAN bus backbone with a TJA1050 transceiver, it forms a slave node reading field sensors and broadcasting status frames. The 4.2-5.5V supply matches 5V industrial rails directly. Trade-off: EPROM requires pre-programmed parts - consider PIC18F8525 for field-updateable firmware.
מומלץ
Automotive Body Control Module
Automotive body control modules benefit from the PIC18C858-I/PT's combination of 32KB EPROM, integrated CAN, and 68 I/O pins. Window, mirror, lighting, and door-lock actuators can be driven directly through high-current I/O ports while CAN connectivity links the BCM to the vehicle bus. The 10-bit ADC reads switch and sensor inputs for debounced control decisions. Operating from a regulated 5V rail with industrial temperature rating, it suits under-dash automotive environments. The CAN hardware filtering offloads message routing from the CPU, leaving cycles for body-control logic. Note: For safety-critical systems requiring ASIL compliance, pair with an external watchdog and consider newer PIC18F variants with functional safety documentation.
מומלץ
Building Automation Gateway
Building automation gateways bridge HVAC, lighting, and security subsystems using the PIC18C858-I/PT's CAN module plus USART and MSSP peripherals. The 32KB EPROM stores gateway routing tables and protocol converters, while 1.5KB RAM handles message buffering. The 68 I/O pins drive status LEDs, keypads, and LCD displays common to building controllers. Running at 40MHz it converts between BACnet, Modbus, and CAN protocols in real time. The 5V supply matches typical building-automation backplane rails, and the -40C to +85C industrial range covers mechanical-room environments. Trade-off: EPROM programming requires a parallel programmer at production - the PIC18F8525-I/PT offers ICSP for in-the-field firmware updates.
מומלץ
Process Control Sensor Hub
Process control sensor hubs use the PIC18C858-I/PT to aggregate multiple analog and digital sensors and broadcast readings over CAN. The 10-bit ADC multiplexes across multiple process variables (temperature, pressure, flow), while the integrated CAN module transmits standardized frames to a central PLC. The 68 I/O pins accommodate digital sensor arrays plus HMI keypad input. At 10 MIPS the MCU handles linearization math, calibration lookups, and CAN protocol stack simultaneously. The 4.2-5.5V supply operates from a 5V regulated industrial rail. The wide temperature range supports outdoor and factory-floor deployments. Compared to a discrete ADC + microcontroller solution, this integrated part reduces BOM count and PCB footprint.
מומלץ
HVAC Controller Board
HVAC controller boards leverage the PIC18C858-I/PT for fan, compressor, and valve control loops. The CCP/PWM peripherals generate variable-speed drive signals for brushless DC fans, while the ADC reads temperature sensors from multiple zones. The integrated CAN bus links indoor units to the building management system. With 32KB of program memory, control loop firmware plus scheduling logic fits comfortably. The 1.5KB RAM handles setpoint storage and PID working variables. Operating from a 5V supply with industrial temperature grade, the MCU suits rooftop unit and air-handler installations. For new designs, migrate to PIC18F8525-I/PT to gain flash reprogrammability and field firmware updates.
מומלץ
Embedded CAN-to-Serial Bridge
A CAN-to-serial bridge application uses the PIC18C858-I/PT to convert between CAN 2.0B frames and RS-232/RS-485 serial traffic for legacy equipment integration. The CAN peripheral handles incoming automotive or industrial frames, while the USART drives the serial port at programmable baud rates. The MSSP peripheral can additionally support SPI-to-CAN bridging. With 68 I/O pins, status LEDs and configuration switches fit alongside the comms interfaces. The 32KB EPROM holds the protocol-conversion state machine and configuration tables. Operating at 40MHz the bridge sustains full-duplex serial plus 1 Mbps CAN without frame drops. Trade-off: For high-throughput bridging with multi-message buffering, the larger RAM on PIC18F8525 is preferable.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18C858-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC18C658-I/PT | PIC18F8525-I/PT | PIC18C858T-I/PT | PIC18C858-E/PT | PIC18C801-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Program Memory | 32 KB EPROM | 16 KB EPROM (-50%) | 32 KB Flash (same size, in-system programmable) | 32 KB EPROM (same) | 32 KB EPROM (same) | 0 KB (external memory only) |
| RAM Size | 1.5 KB | 1.5 KB (same) | 4 KB (+167%) | 1.5 KB (same) | 1.5 KB (same) | 1.5 KB (same) |
| Memory Type | EPROM (OTP) | EPROM (OTP) | Flash (in-system programmable) | EPROM (OTP) | EPROM (OTP) | External memory only |
| Core Clock Speed | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) |
| CAN Module | Yes (integrated CAN 2.0B) | Yes (integrated CAN 2.0B) | Yes (integrated CAN 2.0B) | Yes (integrated CAN 2.0B) | Yes (integrated CAN 2.0B) | No (external memory only) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) |
מבדילים עיקריים
- Integrated CAN 2.0B peripheral with hardware filtering (לעומתPIC18C801-I/PT)
- 32 KB EPROM program memory (לעומתPIC18C658-I/PT)
- Flash-based successor path with same peripherals (לעומתPIC18F8525-I/PT)
הערות תכנון
The PIC18C858-I/PT operates from a single 4.2V to 5.5V supply. Place a 100nF decoupling capacitor close to each VDD pin (multiple VDD pins on the TQFP-80 package) and a bulk 10uF tantalum or ceramic capacitor on the board supply rail. Use separate analog (AVDD) and digital (VDD) supplies tied together at a single point near the IC if the ADC is in use, with a ferrite bead to reduce digital switching noise coupling into analog measurements.
The PIC18C858 uses EPROM (OTP) memory, so firmware must be fully validated before production programming. Unlike flash-based PIC18F variants, there is no in-circuit reprogramming option. Engineers should prototype on a flash-based equivalent (e.g., PIC18F8525-I/PT) to avoid scrapping EPROM parts during firmware iteration. The part is also marked NRND (Not Recommended for new designs) by Microchip - verify the end product's lifecycle support window before committing to this part in long-life designs.
Route the CANRX and CANTX pins to the CAN transceiver (e.g., TJA1050) using a matched-impedance differential pair, keeping the traces short and away from switching nodes. Place the oscillator crystal as close to OSC1/OSC2 as possible with ground guard traces. The 80-pin TQFP package has a thermal pad - solder it to a ground copper pour for improved thermal dissipation, especially at 40MHz operation. Avoid running noisy digital signals parallel to analog inputs to minimize ADC crosstalk.
מידע על תאימות
RoHS, REACH, and lead-free status not explicitly provided in the verified web data. PIC18C858 is an older EPROM-based MCU (introduced ~1999), predating many modern compliance certifications. Marked NRND (Not Recommended for new designs) by Microchip as of 2026-09-26.
