PIC18C658-I/PT - 8-bit 40MHz 32KB OTP MCU w/CAN | Microchip
MPN： PIC18C658-I/PT ✗ 停產PIC18C658-I/PT 概覽
What is an 8-bit OTP microcontroller? An OTP MCU is a microcontroller whose program memory can be written once during production programming, after which the code becomes permanent - similar to a masked-ROM device but with the flexibility of late-stage firmware customization. Within the broader taxonomy, this places PIC18C658 in the 8-bit MCU -> PIC microcontroller -> microcontroller -> embedded processing IC hierarchy. The integrated CAN module makes it specifically a "MCU with on-board communication peripheral," sitting at the intersection of general-purpose control and automotive/industrial networking silicon.
Key differentiating features include a 40 MHz maximum clock speed (10 MIPS throughput), an enhanced 16-bit instruction set with 77 instructions, a 10-bit ADC, three timers, a USART, an MSSP (SPI/I2C) port, and the integrated CAN 2.0B module. The OTP memory suits low-volume production runs and field-programmable prototypes where mask-ROM tooling costs are prohibitive. The 64-pin TQFP package exposes enough I/O for human-interface panels, multi-drop sensor arrays, and CAN bus nodes.
Architecturally, the PIC18C658 employs a Harvard architecture with separate program and data buses, an 8-bit ALU, and a hardware multiplier for single-cycle 8x8 operations. The integrated CAN engine handles full CAN 2.0B active frame transmission/reception with three transmit and two receive buffers, offloading the CPU from bit-level protocol work and enabling deterministic network behaviour.
Typical applications include automotive body and chassis networks (CAN nodes for window/lights/seat modules), industrial CANopen/J1939 slave nodes, building automation (HVAC controllers, lighting gateways), embedded control with on-chip networking, and low-volume OEM instrumentation. The industrial temperature range (-40°C to +85°C, "I" suffix) supports factory-floor and automotive under-hood environments.
When designing with PIC18C658-I/PT, ensure OTP programming is performed before final board assembly using a Microchip MPLAB PM3 or ICD2 programmer. Because OTP cannot be erased, firmware verification (read-back compare) is mandatory before bulk programming. For new designs, evaluate the flash-based PIC18F6585 as a more flexible alternative.
This page consolidates distributor pricing, drop-in same-package alternatives, application-specific design notes, and parametric comparisons not aggregated on any single distributor page - an information-gain reference for engineers evaluating, sourcing, or replacing this legacy Microchip MCU.
直接替換替代品，適用於 PIC18C658-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18C658-I/PT （相同外形與佔位） — 差異在於 Core Architecture, Package, Program Memory Type, Operating Temperature, Program Memory Size.
PIC18F6585-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F6680-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18C858-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18C601-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18C658-I/PT 最大額定值與電氣特性
| Core Architecture | PIC 8-bit (Harvard) |
| Family | PIC® 18C |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM | 1536 bytes |
| 最大時脈頻率 | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Operating Voltage | 5 V |
| I/O Pins | 52 |
| ADC | 10-bit (channels not in verified data) |
| Timers | 3 (per datasheet family) |
| Communication Interfaces | CAN 2.0B, USART, MSSP (SPI/I2C) |
| 封裝 | 64-pin TQFP (10x10 mm) |
| 工作溫度 | -40C to +85C (Industrial, "I" suffix) |
| 安裝類型 | Surface Mount |
PIC18C658-I/PT 腳位配置
| 腳位 1 | MCLR — Master Clear (reset) input |
| 腳位 2 | OSC1 — Oscillator input |
| 腳位 3 | OSC2 — Oscillator output |
| 腳位 4 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| 腳位 5 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| 腳位 6 | RA2/AN2 — PORTA bit 2 / ADC input 2 |
| 腳位 7 | RA3/AN3 — PORTA bit 3 / ADC input 3 |
| 腳位 8 | RA4/TOCKI — PORTA bit 4 / Timer0 clock input |
| 腳位 9 | RA5/AN4/SS — PORTA bit 5 / ADC input 4 / SPI slave select |
| 腳位 10 | VSS — Ground |
| 腳位 11 | VDD — Positive supply (5 V) |
| 腳位 12 | RB0/INT — PORTB bit 0 / external interrupt |
| 腳位 13 | RB1 — PORTB bit 1 |
| 腳位 14 | RB2 — PORTB bit 2 |
| 腳位 15 | RB3 — PORTB bit 3 |
| 腳位 16 | RB4 — PORTB bit 4 |
| 腳位 17 | RB5 — PORTB bit 5 |
| 腳位 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 20 | VSS — Ground |
| 腳位 21 | VDD — Positive supply (5 V) |
| 腳位 22 | RC0/T1CKI — PORTC bit 0 / Timer1 clock input |
| 腳位 23 | RC1/CCP2 — PORTC bit 1 / Capture/Compare/PWM 2 |
| 腳位 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| 腳位 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 28 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| 腳位 29 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| 腳位 30 | VSS — Ground |
| 腳位 31 | VDD — Positive supply (5 V) |
| 腳位 32 | RD0 — PORTD bit 0 |
| 腳位 33 | RD1 — PORTD bit 1 |
| 腳位 34 | RD2 — PORTD bit 2 |
| 腳位 35 | RD3 — PORTD bit 3 |
| 腳位 36 | RD4 — PORTD bit 4 |
| 腳位 37 | RD5 — PORTD bit 5 |
| 腳位 38 | RD6 — PORTD bit 6 |
| 腳位 39 | RD7 — PORTD bit 7 |
| 腳位 40 | VSS — Ground |
| 腳位 41 | VDD — Positive supply (5 V) |
| 腳位 42 | RE0/RD — PORTE bit 0 / parallel slave port read |
| 腳位 43 | RE1/WR — PORTE bit 1 / parallel slave port write |
| 腳位 44 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| 腳位 45 | RE3 — PORTE bit 3 |
| 腳位 46 | CANTX — CAN transmit output (to transceiver) |
| 腳位 47 | CANRX — CAN receive input (from transceiver) |
| 腳位 48 | VDD — Positive supply (5 V) |
| 腳位 49 | VSS — Ground |
| 腳位 50 | RF0 — PORTF bit 0 |
| 腳位 51 | RF1 — PORTF bit 1 |
| 腳位 52 | RF2 — PORTF bit 2 |
| 腳位 53 | RF3 — PORTF bit 3 |
| 腳位 54 | RF4 — PORTF bit 4 |
| 腳位 55 | RF5 — PORTF bit 5 |
| 腳位 56 | RF6 — PORTF bit 6 |
| 腳位 57 | RF7 — PORTF bit 7 |
| 腳位 58 | RG0 — PORTG bit 0 |
| 腳位 59 | RG1 — PORTG bit 1 |
| 腳位 60 | RG2 — PORTG bit 2 |
| 腳位 61 | RG3 — PORTG bit 3 |
| 腳位 62 | RG4 — PORTG bit 4 |
| 腳位 63 | VSS — Ground |
| 腳位 64 | VDD — Positive supply (5 V) |
典型應用
PIC18C658-I/PT 適用於 6 應用s: Automotive CAN Body Electronics, Industrial CANopen Slave Nodes, Building Automation Gateways, Embedded Sensor Hubs with CAN Connectivity, Low-Volume OEM Instrumentation, CAN-Based Motor Control Nodes.
Automotive CAN Body Electronics
The PIC18C658-I/PT's integrated CAN 2.0B controller with three transmit and two receive buffers makes it suitable for automotive body electronics nodes such as window lift, seat control, lighting modules, and mirror actuators. Operating from a 5 V supply and industrial -40C to +85C temperature range, it tolerates cabin and trunk-mounted environments. The 52 I/O pins can drive relay coils, read switch positions, and PWM LEDs directly, while the CAN engine offloads bus protocol from the CPU for deterministic 125 kbps to 1 Mbps network behaviour.
推薦
Industrial CANopen Slave Nodes
For factory-automation CANopen networks, the PIC18C658-I/PT provides the CAN 2.0B hardware backbone needed to implement slave-node profiles (DS301/DS401). The 32 KB OTP program memory holds CANopen stack and application firmware for sensor/actuator nodes; the 1536 bytes RAM supports PDO/SDO buffering. The 40 MHz / 10 MIPS core executes protocol state machines with headroom, while the 10-bit ADC reads analog sensor inputs. Note: OTP memory requires final firmware lock-in at production - flash-based PIC18F6585 is preferred for late-stage protocol changes.
推薦
Building Automation Gateways
In HVAC controllers, lighting gateways, and access-control panels, the PIC18C658-I/PT serves as the local supervisory MCU bridging CAN-bus building networks with local I/O. The 52 I/O can scan keypads, drive triac outputs for lighting dimmers, read thermistor inputs, and control damper motors. The integrated CAN module enables BACnet/MS-TP to CAN bridging or LonWorks-to-CAN protocol translation. The 64-pin TQFP package suits 4-layer control board designs with adequate grounding for EMI-sensitive analog sensor front-ends.
推薦
Embedded Sensor Hubs with CAN Connectivity
The PIC18C658-I/PT's combination of 10-bit ADC, 52 I/O, and CAN 2.0B makes it a fit for distributed sensor hubs that aggregate analog/digital signals and broadcast them over a CAN bus to a central controller. Typical deployments include machine-vision illumination controllers, multi-zone temperature transmitters, and hydraulic pressure monitoring nodes. The 32 KB OTP program memory holds device firmware plus calibration constants; the industrial temperature range suits outdoor and cabinet-mounted installations.
推薦
Low-Volume OEM Instrumentation
For low-volume OEM products (annual production hundreds to a few thousand units), the PIC18C658-I/PT's OTP memory eliminates the mask-ROM NRE charges that flash-killed RISC MCUs would also avoid, while keeping the cost-of-programming low with a single MPLAB PM3 production run. The PIC18 instruction set is well-documented and supported by MPLAB X IDE, accelerating firmware development. Typical instruments include laboratory data loggers, custom test fixtures, and specialized medical monitoring peripherals where CAN networking simplifies multi-instrument synchronization.
推薦
CAN-Based Motor Control Nodes
The PIC18C658-I/PT can act as a CAN-connected brushless DC or stepper motor controller node, with three on-chip timers providing PWM generation, capture/compare for feedback, and a tick timer for commutation. The integrated CAN bus allows centralized motion controllers to command torque, speed, and position profiles to many distributed motor nodes over a single twisted pair. The 5 V supply and industrial temperature range suit machine-tool and packaging-equipment environments; the 52 I/O enables parallel multi-axis control from a single MCU.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18C658-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F6585-I/PT | PIC18F6680-I/PT | PIC18C601-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10) | TQFP-64 (10x10) - same | TQFP-64 (10x10) - same | TQFP-64 (10x10) - same |
| Core / Architecture | PIC18C, 8-bit, 40 MHz | PIC18F, 8-bit, 40 MHz - same core | PIC18F, 8-bit, 40 MHz - same core | PIC18C, 8-bit, 40 MHz - same core |
| Memory Type | OTP (write-once) | Flash (rewritable) | Flash (rewritable) | OTP (write-once) |
| CAN Module | CAN 2.0B integrated | CAN 2.0B integrated - same | CAN 2.0B integrated - same | No CAN module |
| I/O Pins | 52 | 52 - same | 52 - same | 52 - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Lifecycle Status | Obsolete (PIC18C family EOL) | Active (flash successor) | Active (flash successor) | Obsolete (same PIC18C family) |
主要差異化特點
- Integrated CAN 2.0B controller on-chip (對比PIC18C601-I/PT)
- Flash memory for in-field firmware updates (對比PIC18F6585-I/PT)
- Higher program memory density (對比PIC18F6680-I/PT)
設計說明
OTP memory can be written only once - there is no erase operation. Perform read-back verification with the MPLAB PM3 programmer after every production OTP burn to detect bit failures, and complete all firmware development on a flash-based equivalent (PIC18F6585) before committing to OTP. A single OTP write error scrapping a programmed part cannot be undone in-circuit.
The TQFP-64 (10x10 mm) package requires a 4-layer PCB with a continuous ground plane beneath the die for EMI and thermal performance. Place the MCP2551 CAN transceiver within 25 mm of the CANTX/CANRX pins (pins 46/47) and route the differential CAN bus traces with 120-ohm characteristic impedance and matched lengths. Decouple each VDD pin (11, 21, 31, 41, 48, 64) with a 100 nF ceramic capacitor plus a 10 uF bulk capacitor at the package entry.
The PIC18C658-I/PT operates from a single 5 V supply. Estimated supply current at 40 MHz with CAN active is approximately 25-35 mA; add 5-8 mA per output pin driving a 20 mA LED load. A MCP130 voltage supervisor or RC reset on MCLR (pin 1) is recommended for industrial environments to prevent brown-out code execution. The internal POR (power-on reset) is enabled by configuration fuses but should be supplemented with an external reset circuit for noisy CAN bus environments.
Estimated: At continuous 40 MHz operation, ambient +25C, the PIC18C658-I/PT dissipates approximately 0.15 W internal power. The TQFP-64 (10x10) has theta_JA of approximately 50 C/W on a 4-layer JEDEC test board, giving a junction-to-ambient rise of about 7.5 C - well within the -40C to +85C industrial range. No external heatsink required; however, a continuous ground plane on the top and bottom layers is essential to achieve the rated theta_JA.
合規資訊
Compliance data not found in verified web data. PIC18C family predates widespread RoHS adoption; many PIC18C658-I/PT variants are non-RoHS. AEC-Q100 qualification not applicable for industrial-grade 8-bit MCU; automotive designs should select PIC18F6680 with AEC-Q100 grade.
