PIC18C858T-I/L - 8-Bit 40MHz 32KB OTP MCU 84-PLCC | PIC18C Series
MPN: PIC18C858T-I/L ✗ Akhir HidupPIC18C858T-I/L Ringkasan
What is a PIC18C-series microcontroller? The PIC18C is an early high-performance 8-bit MCU family in Microchip's PIC18 lineage, combining a RISC Harvard architecture with on-chip CAN, EPROM/OTP program memory, and rich peripherals such as PWM, USART, A/D converter, Brown-out Reset (BOR), Low-Voltage Detect (LVD), and Power-On Reset (POR). It sits in the PIC taxonomy as: PIC18C -> PIC18 family -> PIC microcontrollers -> 8-bit MCU -> microcontroller -> embedded IC. This hierarchy makes the PIC18C858T-I/L a canonical high-performance, CAN-enabled 8-bit controller for industrial embedded designs.
Key features include 32KB OTP program memory (16K x 16 words), 1.5KB on-chip RAM, an integrated CAN 2.0A/B module for automotive and industrial networking, a 10-bit multi-channel A/D converter, up to 16K words of program addressing space, and a wide operating voltage range typical of the family. Peripherals include a Watchdog Timer (WDT), PWM modules, USART, and parallel slave port. The 'T' suffix denotes Tape & Reel packaging and 'I' indicates the industrial temperature grade.
Architecturally, the device uses an enhanced Harvard CPU with a 16-bit instruction word and 8-bit data path, eight-level deep hardware stack, and DC-40MHz clock input. The PIC18C858 is the higher-memory variant of the PIC18C family (alongside PIC18C658 and PIC18C452), targeting CAN-based distributed control and instrumentation systems. Note: the PIC18C858T-I/L is now a legacy/obsolete part - Microchip recommends PIC18F8525 as the modern successor with Flash memory and CAN.
Typical applications include industrial CAN nodes, automotive body and chassis ECUs, HVAC controllers, building automation, security and access control panels, and legacy embedded control systems that require deterministic 8-bit processing with on-chip networking. It is also suited for sensor hubs and motor control where the integrated A/D and PWM peripherals reduce external component count.
When designing with this part, account for OTP memory constraints (one-time programmable, not re-programmable in-circuit like Flash), ensure correct decoupling on VDD/VSS pairs, and verify the 84-pin PLCC land pattern against current PCB library footprints. For new designs, evaluate the Flash-based PIC18F8525 successor first to avoid OTP one-shot programming risk in production.
Alternatif penggantian untuk PIC18C858T-I/L — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian PIC18C858T-I/L (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Package, ADC, Core, Data Memory Addressing.
PIC18C858-I/L
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC18C858-E/L
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC18F8525-I/PT
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC18C858T-I/PT
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →PIC18C858T-I/L Rating Maksimal & Karakteristik Listrik
| Series | PIC 18C |
| Core Processor | PIC |
| Core Size | 8-bit |
| Frekuensi Bawah Maximum | 40 MHz |
| Program Memory Size | 32 KB (16K x 16) OTP |
| RAM Size | 1.5 KB |
| Paket / Case | 84-PLCC (J-Lead, 29.31 x 29.31 mm) |
| Tipe Mounting | Surface Mount |
| Operating Voltage | 5 V |
| Suhu Kerja | -40C to +85C (Industrial, 'I') |
| Packaging | Tape & Reel ('T' suffix) |
| On-chip CAN Module | Yes (CAN 2.0A/B) |
| A/D Converter | 10-bit, multi-channel |
| Peripherals | Brown-out Detect/Reset, LVD, POR, PWM, WDT |
| Instruction Set | PIC18C enhanced Harvard, 16-bit instruction word |
| Jumlah Pin | 84 |
| Tipe Memori | OTP (One-Time Programmable) |
| Successor (per manufacturer) | PIC18F8525 |
Konfigurasi Pin PIC18C858T-I/L
| Pin produk 1 | VSS — Ground reference |
| Pin produk 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin produk 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin produk 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pin produk 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin produk 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin produk 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin produk 8 | RA6/OSC2 — PORTA bit 6 / Oscillator output |
| Pin produk 9 | OSC1/CLKIN — Oscillator input / external clock |
| Pin produk 10 | RA7/OSC1 — PORTA bit 7 / Oscillator input |
| Pin produk 11 | VSS — Ground |
| Pin produk 12 | VDD — Positive supply (5V) |
| Pin produk 13 | MCLR/VPP — Master Clear reset / Programming voltage |
| Pin produk 14 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pin produk 15 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin produk 16 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin produk 17 | RB3/INT3/CANRX — PORTB bit 3 / External interrupt 3 / CAN receive |
| Pin produk 18 | RB4/INT4/CANTX — PORTB bit 4 / External interrupt 4 / CAN transmit |
| Pin produk 19 | RB5/INT5 — PORTB bit 5 / External interrupt 5 |
| Pin produk 20 | RB6/INT6/PGC — PORTB bit 6 / ICSP clock |
| Pin produk 21 | RB7/INT7/PGD — PORTB bit 7 / ICSP data |
| Pin produk 22 | VSS — Ground |
| Pin produk 23 | VDD — Positive supply (5V) |
| Pin produk 24 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock |
| Pin produk 25 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pin produk 26 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin produk 27 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin produk 28 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin produk 29 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin produk 30 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin produk 31 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin produk 32 | VSS — Ground |
| Pin produk 33 | VDD — Positive supply (5V) |
| Pin produk 34 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pin produk 35 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pin produk 36 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pin produk 37 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pin produk 38 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pin produk 39 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pin produk 40 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pin produk 41 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pin produk 42 | VSS — Ground |
| Pin produk 43 | VDD — Positive supply (5V) |
| Pin produk 44 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| Pin produk 45 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| Pin produk 46 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| Pin produk 47 | VSS — Ground |
| Pin produk 48 | VDD — Positive supply (5V) |
| Pin produk 49 | RF0/AN8 — PORTF bit 0 / Analog input 8 |
| Pin produk 50 | RF1/AN9/C2OUT — PORTF bit 1 / Analog input 9 / Comparator 2 output |
| Pin produk 51 | RF2/AN10/C1OUT — PORTF bit 2 / Analog input 10 / Comparator 1 output |
| Pin produk 52 | RF3/AN11 — PORTF bit 3 / Analog input 11 |
| Pin produk 53 | RF4/AN12 — PORTF bit 4 / Analog input 12 |
| Pin produk 54 | RF5/AN13 — PORTF bit 5 / Analog input 13 |
| Pin produk 55 | RF6/AN14 — PORTF bit 6 / Analog input 14 |
| Pin produk 56 | RF7/AN15 — PORTF bit 7 / Analog input 15 |
| Pin produk 57 | VSS — Ground |
| Pin produk 58 | VDD — Positive supply (5V) |
| Pin produk 59 | RG0 — PORTG bit 0 |
| Pin produk 60 | RG1 — PORTG bit 1 |
| Pin produk 61 | RG2 — PORTG bit 2 |
| Pin produk 62 | RG3 — PORTG bit 3 |
| Pin produk 63 | RG4 — PORTG bit 4 |
| Pin produk 65 | RG5 — PORTG bit 5 |
| Pin produk 66 | VSS — Ground |
| Pin produk 67 | VDD — Positive supply (5V) |
| Pin produk 68 | NC — Not connected (per datasheet) |
| Pin produk 69 | NC — Not connected (per datasheet) |
| Pin produk 70 | NC — Not connected (per datasheet) |
| Pin produk 71 | NC — Not connected (per datasheet) |
| Pin produk 72 | NC — Not connected (per datasheet) |
| Pin produk 73 | NC — Not connected (per datasheet) |
| Pin produk 74 | NC — Not connected (per datasheet) |
| Pin produk 75 | NC — Not connected (per datasheet) |
| Pin produk 76 | NC — Not connected (per datasheet) |
| Pin produk 77 | NC — Not connected (per datasheet) |
| Pin produk 78 | NC — Not connected (per datasheet) |
| Pin produk 79 | NC — Not connected (per datasheet) |
| Pin produk 80 | NC — Not connected (per datasheet) |
| Pin produk 81 | VSS — Ground |
| Pin produk 82 | VDD — Positive supply (5V) |
| Pin produk 83 | NC — Not connected (per datasheet) |
| Pin produk 84 | NC — Not connected (per datasheet) |
Aplikasi Umum
PIC18C858T-I/L cocok untuk 6 aplikasis: Industrial CAN Nodes, Automotive Body and Chassis ECUs, HVAC Controllers, Building Automation Panels, Security and Access Control Panels, Legacy Industrial Instrumentation.
Industrial CAN Nodes
The PIC18C858T-I/L is purpose-built for industrial CAN-bus nodes where deterministic 8-bit processing and on-chip networking eliminate the need for an external CAN controller. With its integrated CAN 2.0A/B module, 32KB OTP program memory, and 40MHz/10 MIPS throughput, the part handles CANopen or DeviceNet slave stacks in PLC I/O modules, distributed sensor hubs, and machine controllers. Its 1.5KB of on-chip RAM accommodates small protocol buffers without external memory.
Direkomendasikan
Automotive Body and Chassis ECUs
In automotive body and chassis ECUs, the PIC18C858T-I/L's on-chip CAN module and industrial -40C to +85C temperature grade suit door modules, seat controllers, lighting drivers, and instrument-cluster peripherals. The 10-bit multi-channel ADC reads sensor inputs (temperature, position, current) while the PWM modules drive actuators (motors, LEDs). OTP memory locks firmware against post-production tampering - appropriate for high-volume body controllers.
Direkomendasikan
HVAC Controllers
HVAC controller boards benefit from the PIC18C858T-I/L's mix of analog and digital peripherals: the 10-bit ADC samples thermistor and pressure sensors, the PWM modules control variable-speed blower motors and damper actuators, and the USART drives LCD display panels. The 32KB OTP code space fits state-machine control logic, while 1.5KB of RAM holds setpoint history. The industrial temperature grade handles attic and rooftop equipment operating conditions.
Direkomendasikan
Building Automation Panels
Building automation panels (lighting, access, elevator control) use the PIC18C858T-I/L for relay/keypad input scanning, LED driving, and CAN or RS-485 networking. The 84-PLCC package supports the wide I/O count required to drive 7-segment displays, scan matrix keypads, and switch multiple relay banks without external I/O expanders. Industrial temperature range and PIC reliability make it a fit for 24/7 commercial installations.
Direkomendasikan
Security and Access Control Panels
Security panels leverage the PIC18C858T-I/L for multi-zone alarm inputs, keypad scanning, and communication with central monitoring stations. The integrated CAN module connects to distributed sensors (PIR, glass-break, door contacts) across large sites. With OTP program memory, deployed firmware is tamper-resistant. The 40MHz CPU executes encryption routines for secure keypad entries and challenge-response authentication flows.
Direkomendasikan
Legacy Industrial Instrumentation
The PIC18C858T-I/L supports long-lifecycle industrial instrumentation (process meters, weighing scales, panel displays) where firmware has been qualified and locked for years of production. Maintaining production lines already tooled around this 84-PLCC OTP MCU avoids costly re-validation. Engineers designing replacement boards for installed equipment continue to specify PIC18C858T-I/L while migrating new products to PIC18F8525.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk PIC18C858T-I/L — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | PIC18C858-I/L | PIC18C858-E/L | PIC18F8525-I/PT |
|---|---|---|---|---|
| Package | 84-PLCC (J-Lead) | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 80-TQFP - different (PCB rework) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 32KB OTP | 32KB OTP | 32KB OTP | 48KB Flash |
| Memory Type | OTP (one-time programmable) | OTP | OTP | Flash (reprogrammable) |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 3.8 KB |
| Max Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN Module | Yes (CAN 2.0A/B) | Yes (CAN 2.0A/B) | Yes (CAN 2.0A/B) | Yes (CAN 2.0A/B) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active |
Diferensiator Kunci
- Integrated CAN 2.0A/B module eliminates external controller (vsPIC18C452-I/L)
- 32KB OTP program memory - double the code space of smaller siblings (vsPIC18C658T-I/PT)
- Recommended successor: PIC18F8525 with Flash memory (vsSelf (vs PIC18F8525-I/PT))
Catatan Desain
PIC18C858T-I/L uses OTP (One-Time Programmable) memory - once programmed, the firmware cannot be changed. This is critical for production: a single bad bit in the OTP array bricks the device permanently. For prototype development, always use the Flash-based PIC18F8525 (or PIC18F8585) and migrate only to OTP for locked production runs. Verify the entire firmware image before committing to the OTP programming step.
Place 0.1uF decoupling capacitors as close as possible to each VDD/VSS pin pair of the 84-PLCC package - there are 5 VDD/VSS pairs distributed around the device per the PIC18C858 datasheet. Add a single bulk 10uF tantalum or ceramic capacitor near the IC. Ensure the 84-PLCC land pattern follows the J-Lead (PLCC) standard with proper thermal relief spokes for wave or reflow soldering. Confirm the land pattern matches the latest IPC-7351 library to avoid solder joint defects.
The CAN module (CANTX/CANRX on RB3/RB4) requires an external CAN transceiver such as MCP2551 or TJA1050 - the on-chip CAN peripheral handles only protocol-layer logic, not bus physics. Place the transceiver within 25mm of the MCU CAN pins, use a 120-ohm termination resistor at each end of the bus, and route CANH/CANL as a differential pair with matched impedance. Add TVS protection (e.g., NUP2105) for automotive surge immunity.
Estimated: at 40MHz clock, 5V supply, and typical industrial operating profile (alternating active/standby), the PIC18C858T-I/L dissipates approximately 50-100mW - well within the 84-PLCC thermal envelope (theta_JA approximately 35-45 C/W for PLCC). At 85C ambient, junction temperature remains below 100C. No heatsink is required, but ensure adequate PCB copper around the PLCC leads for thermal spreading. For sealed enclosures with limited airflow, verify thermal performance with a thermocouple on the package top during worst-case load.
Informasi Konformitas
Compliance information not explicitly stated in verified web data. PIC18C858T-I/L is a legacy part from 2000; RoHS lead-free status not confirmed in retrieved distributor listings. AEC-Q100 not qualified per Microchip product family conventions for this part.
