PIC18C858T-I/PT - 8-Bit 40MHz 32KB OTP MCU with CAN | Microchip
MPN: PIC18C858T-I/PT ✗ Cuối đờiPIC18C858T-I/PT Tóm tắt
An 8-bit MCU (microcontroller unit) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, peripherals, and I/O on one silicon die. The PIC18 family is the high-end 8-bit line of Microchip's PIC architecture and sits within the broader hierarchy: PIC18C -> PIC18 -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. The 'C' family specifically denotes the OTP EPROM-based legacy line, which has since been largely replaced by flash-based PIC18F parts but is still sought for legacy designs and long-lifecycle industrial systems.
Key features include 32KB (16K x 16) of EPROM program memory, 4KB of linear data memory addressing, an integrated CAN 2.0B peripheral for automotive and industrial networking, multiple timers, USART, I2C/SPI, and 10-bit ADC channels. The TQFP-80 package provides 69 I/O pins across 11 ports, supporting parallel expansion interfaces and external memory buses typical of CAN-equipped industrial nodes.
The PIC18C858T-I uses an enhanced Harvard architecture with separate program and data buses, a hardware multiplier, and a 16-bit instruction word. Its CAN peripheral supports standard and extended frames, making it suitable for protocols such as CANopen and DeviceNet used in factory automation. The 40 MHz clock yields a 100 ns instruction cycle and supports C-optimized code generation.
Typical applications include industrial CAN nodes (sensor hubs, motor controllers), automotive body controllers, building automation gateways, and embedded control boards that need a deterministic 8-bit core with on-chip CAN. The wide operating temperature range (-40C to +85C industrial grade) supports factory floor and outdoor cabinet installations.
When designing with this part, note that PIC18C devices use OTP EPROM, not flash - firmware cannot be reprogrammed in-circuit. Plan for code-stable designs or migration to the recommended PIC18F8525 (per Microchip's own product page notice). Use the ICD-2 or compatible in-circuit debugger during development before committing code to OTP.
This page synthesizes distributor availability, current pricing tiers, parametric cross-references, and design notes not consolidated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18C858T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18C858T-I/PT (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, CAN Module, ADC, Core Architecture.
PIC18F8525-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18C858-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18C858T-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18C858T-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F458-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18C858T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18C (8-bit RISC, Harvard) |
| Program Memory | 32 KB OTP EPROM (16K x 16) |
| Data Memory Addressing | Linear, up to 4 Kbytes |
| Tần số xung maksimum | 40 MHz |
| Instruction Cycle | 100 ns (10 MIPS) |
| Điện áp cung cấp | 5 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Temperature Grade | Industrial |
| Hộp | 80-pin TQFP (12x12 mm), gull-wing |
| Package Code | TFQFP |
| CAN Module | Yes (CAN 2.0B) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC18C858T-I/PT
| Chân 1 | MCLR — Master Clear (Reset) input |
| Chân 2 | RA0 — PORTA bit 0 / AN0 analog input |
| Chân 3 | RA1 — PORTA bit 1 / AN1 analog input |
| Chân 4 | RA2 — PORTA bit 2 / AN2 analog input |
| Chân 5 | RA3 — PORTA bit 3 / AN3 / VREF+ |
| Chân 6 | RA4 — PORTA bit 4 / T0CKI |
| Chân 7 | RA5 — PORTA bit 5 / AN4 / SS |
| Chân 8 | RE0 — PORTE bit 0 / RD / AN5 |
| Chân 9 | RE1 — PORTE bit 1 / WR / AN6 |
| Chân 10 | RE2 — PORTE bit 2 / CS / AN7 |
| Chân 11 | VDD — Positive supply (5V) |
| Chân 12 | VSS — Ground |
| Chân 13 | OSC1 — Crystal/oscillator input |
| Chân 14 | OSC2 — Crystal/oscillator output |
| Chân 15 | RC0 — PORTC bit 0 / T1OSO / T13CKI |
| Chân 16 | RC1 — PORTC bit 1 / T1OSI / CCP2 |
| Chân 17 | RC2 — PORTC bit 2 / CCP1 |
| Chân 18 | RC3 — PORTC bit 3 / SCL / SCK |
| Chân 19 | RD0 — PORTD bit 0 / PSP0 |
| Chân 20 | RD1 — PORTD bit 1 / PSP1 |
| Chân 21 | RD2 — PORTD bit 2 / PSP2 |
| Chân 22 | RD3 — PORTD bit 3 / PSP3 |
| Chân 23 | RC4 — PORTC bit 4 / SDI / SDA |
| Chân 24 | RC5 — PORTC bit 5 / SDO |
| Chân 25 | RC6 — PORTC bit 6 / TX / CK |
| Chân 26 | RC7 — PORTC bit 7 / RX / DT |
| Chân 27 | RD4 — PORTD bit 4 / PSP4 |
| Chân 28 | RD5 — PORTD bit 5 / PSP5 |
| Chân 29 | RD6 — PORTD bit 6 / PSP6 / TX2 |
| Chân 30 | RD7 — PORTD bit 7 / PSP7 / RX2 |
| Chân 31 | VSS — Ground |
| Chân 32 | VDD — Positive supply (5V) |
| Chân 33 | RB0 — PORTB bit 0 / INT0 |
| Chân 34 | RB1 — PORTB bit 1 / INT1 |
| Chân 35 | RB2 — PORTB bit 2 / INT2 / CANTX |
| Chân 36 | RB3 — PORTB bit 3 / INT3 / CANRX |
| Chân 37 | RB4 — PORTB bit 4 / INT4 |
| Chân 38 | RB5 — PORTB bit 5 / INT5 |
| Chân 39 | RB6 — PORTB bit 6 / PGC |
| Chân 40 | RB7 — PORTB bit 7 / PGD |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | NC — Not connected (per datasheet) |
| Chân 49 | NC — Not connected (per datasheet) |
| Chân 50 | NC — Not connected (per datasheet) |
| Chân 51 | NC — Not connected (per datasheet) |
| Chân 52 | NC — Not connected (per datasheet) |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
| Chân 57 | NC — Not connected (per datasheet) |
| Chân 58 | NC — Not connected (per datasheet) |
| Chân 59 | NC — Not connected (per datasheet) |
| Chân 60 | NC — Not connected (per datasheet) |
| Chân 61 | NC — Not connected (per datasheet) |
| Chân 62 | NC — Not connected (per datasheet) |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | NC — Not connected (per datasheet) |
| Chân 65 | NC — Not connected (per datasheet) |
| Chân 66 | NC — Not connected (per datasheet) |
| Chân 67 | NC — Not connected (per datasheet) |
| Chân 68 | NC — Not connected (per datasheet) |
| Chân 69 | NC — Not connected (per datasheet) |
| Chân 70 | NC — Not connected (per datasheet) |
| Chân 71 | NC — Not connected (per datasheet) |
| Chân 72 | NC — Not connected (per datasheet) |
| Chân 73 | RF0 — PORTF bit 0 / AN8 |
| Chân 74 | RF1 — PORTF bit 1 / AN9 |
| Chân 75 | RF2 — PORTF bit 2 / AN10 |
| Chân 76 | RF3 — PORTF bit 3 / AN11 |
| Chân 77 | RF4 — PORTF bit 4 / AN12 |
| Chân 78 | RF5 — PORTF bit 5 / AN13 / C2OUT |
| Chân 79 | RF6 — PORTF bit 6 / AN14 / C1OUT |
| Chân 80 | RF7 — PORTF bit 7 / AN15 / SS2 |
Ứng dụng tiêu biểu
PIC18C858T-I/PT phù hợp cho 6 Áp dụngs: Industrial CAN Sensor Node, Automotive Body Control Module, Building Automation Gateway, Industrial Motor Controller, Embedded Control with External Memory Bus, Legacy Industrial Fieldbus Node.
Industrial CAN Sensor Node
The PIC18C858T-I/PT fits industrial CAN sensor hubs thanks to its integrated CAN 2.0B controller, 32 KB OTP program memory, and 40 MHz / 10 MIPS throughput. It can host CANopen or DeviceNet stacks, periodically poll sensor arrays, and broadcast process data frames at 125 kbit/s to 1 Mbit/s. Its -40C to +85C industrial temperature grade supports factory-floor enclosures, while the 80-pin TQFP leaves ample I/O for digital I/O, analog inputs, and a parallel expansion bus. Estimated: a typical sensor node needs ~16 KB of code for CANopen stack + application logic, which fits well within the 32 KB OTP budget.
Được đề xuất
Automotive Body Control Module
The PIC18C858T-I/PT serves automotive body controllers (window/liftgate/seat modules) via its CAN peripheral and 8-bit deterministic core. Its 40 MHz clock handles 100 ms-class body-control loops with predictable latency, and the 5V supply aligns with traditional automotive 12V-bus-regulated rails. The 80-pin TQFP provides 69 I/O lines for driving motors, switches, and LEDs across multi-channel body functions. Trade-off: as an OTP part, firmware cannot be updated over-the-air - designs must ship with stable code or migrate to flash-based PIC18F/PIC32 successors for serviceability.
Được đề xuất
Building Automation Gateway
The PIC18C858T-I/PT bridges building automation protocols (BACnet, Modbus, CAN) in HVAC controllers and access panels. Its CAN bus interfaces with HVAC variable-air-volume boxes, while USART/SPI handle Modbus RTU links to legacy BMS field devices. The 32 KB OTP program memory holds the gateway state machine plus protocol translation tables; 40 MHz throughput keeps BACnet transaction latency below 50 ms. Operating from -40C to +85C, it tolerates rooftop plant-room cabinets. Estimated: a BACnet/IP-to-CAN gateway needs ~20 KB of code, leaving room for Modbus plus diagnostics.
Được đề xuất
Industrial Motor Controller
The PIC18C858T-I/PT drives small BLDC or stepper motor controllers in industrial equipment, using its timers for PWM generation and CAN for command feedback. With 10 MIPS throughput, it can update current/voltage control loops at 10-20 kHz while maintaining CAN communication. The 80-pin TQFP accommodates gate-driver interfaces, encoder inputs, and protection circuit I/O. Its 5V core and industrial temperature range suit 24V industrial bus systems. Power dissipation is modest (~50 mA core current) but consider switching to PIC18F8525 for in-field firmware updates.
Được đề xuất
Embedded Control with External Memory Bus
The PIC18C858T-I/PT targets designs needing external memory expansion through its parallel port and addressable memory interfaces. The 4 KB linear data memory addressing plus external bus lets designers attach SRAM, EPROM, or peripheral ASICs for legacy system emulation. At 40 MHz, the external bus cycle (typically 4 clocks) supports ~10 MHz external transfers. The 80-pin TQFP exposes 69 I/O lines including dedicated external-bus pins. Estimated: external bus transactions consume ~20% CPU time, so firmware budget should reserve headroom.
Được đề xuất
Legacy Industrial Fieldbus Node
The PIC18C858T-I/PT operates as a legacy fieldbus node in CANopen / DeviceNet factory networks, where Microchip's PIC18C line was historically deployed for long-life industrial systems. Its CAN 2.0B controller, OTP code stability (no accidental overwrites), and 80-pin TQFP footprint support drop-in replacement of older units in installed equipment. Code stability via OTP is actually a feature here: firmware cannot be corrupted by voltage transients or unintentional writes. Trade-off: any firmware fix requires physical part replacement, so design firmware carefully or migrate to PIC18F8525 for serviceability.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18C858T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F8525-I/PT | PIC18C858-I/PT | PIC18C858T-E/PT | PIC18C858T-I/L | PIC18F458-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 32 KB OTP EPROM | 48 KB Flash | 32 KB OTP EPROM | 32 KB OTP EPROM | 32 KB OTP EPROM | 32 KB Flash |
| Memory Type | OTP EPROM | Flash (in-circuit reprogrammable) | OTP EPROM | OTP EPROM | OTP EPROM | Flash |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN Module | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Extended (-40C to +125C) | Industrial | Industrial |
| Lifecycle Status | Obsolete | Active | Obsolete | Obsolete | Obsolete | Active (mature) |
Bảo phân biệt quan trọng
- Integrated CAN 2.0B peripheral (vsPIC18F458-I/PT)
- OTP code stability for legacy systems (vsPIC18F8525-I/PT)
- Identical TQFP-80 pinout across the PIC18C858 family (vsPIC18C658T-I/PT)
Ghi chú thiết kế
PIC18C858T-I/PT uses One-Time Programmable (OTP) EPROM, NOT flash. Firmware cannot be reprogrammed in-circuit or in production after programming. Always validate firmware with a windowed or flash prototype part (PIC18F8525 recommended) before committing to OTP production. Once blown, a faulty OTP part must be physically replaced, which is costly in fielded equipment.
Estimated: the PIC18C858T-I/PT core draws ~15-30 mA typical at 40 MHz with 5V supply, so a 5V LDO with at least 100 mA headroom is recommended (e.g., MCP1700 at 250 mA). Decouple VDD with 100 nF ceramic + 10 uF bulk placed within 5 mm of the supply pins (11 and 32 per datasheet). For CAN bus designs, isolate digital and analog grounds with a single-point connection to avoid ground-loop noise on ADC channels.
The 80-pin TQFP has a 0.5 mm pitch and gull-wing leads - design PCB pads per Microchip's TQFP-80 land pattern with adequate thermal relief. Place the decoupling capacitor array (100 nF + 10 uF) as close as possible to pins 11/32. Keep the crystal/oscillator traces short and guarded with a ground ring to minimize EMI. For CAN bus applications, route CANH/CANL as a differential pair with 120 ohm characteristic impedance per ISO 11898.
Thông tin tuân thủ
PIC18C858T-I/PT predates full RoHS transition in many Microchip OTP families. RoHS/REACH status not explicitly confirmed in retrieved distributor data; consult Microchip's product page or contact support for verification before use in RoHS-compliant designs.
