PIC18C801-I/PT - 8-bit ROMless MCU, 2MB External Bus, TQFP-80 | Microchip
MPN: PIC18C801-I/PT ✗ Cuối đờiPIC18C801-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and a range of peripherals (timers, ADC, communication ports) into one package. Within the broader semiconductor taxonomy, the PIC18C801 sits at: microcontroller -> embedded microcontroller -> 8-bit RISC MCU -> semiconductor device. The 8-bit class remains widely deployed in cost-sensitive, deterministic-control applications where 32-bit performance is unnecessary and where the C-friendly PIC18 instruction set with only 77 single-word instructions reduces firmware complexity.
Key features include operation from a 5V supply, an external oscillator interface, industrial temperature grade (-40C to +85C), and ROMless operation that lets the designer pair the MCU with external program memory (EPROM/Flash) for prototyping or low-volume manufacturing. The 12-channel 10-bit ADC supports sensor interfacing, while the two CCP modules provide PWM for motor control, lighting, and power-conversion feedback loops. The ROMless architecture is ideal for systems that require large external program storage, code-update flexibility, or where in-system reprogrammability is mandated.
Typical applications include industrial automation controllers, motor-control boards, sensor-interface front ends, and educational/development platforms that emulate PIC18C601 behavior with larger code space. Designers also use this part for legacy industrial systems where firmware has been validated on the PIC18C601 and now needs additional code headroom.
When designing with the PIC18C801, allocate a generous PCB footprint for the 80-pin TQFP and route the external memory bus with attention to signal integrity. The ROMless architecture adds latency on external fetches compared to flash-based PICs, so critical interrupt routines must be kept short. Use the CCP modules for time-critical control loops.
This page synthesizes verified distributor pricing, drop-in compatible TQFP-80 alternatives, application examples, and design notes not consolidated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18C801-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 PIC18C801-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, Operating Temperature, Core Architecture, Mounting Type.
PIC18C601-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18C658T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18C452T-I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18C801-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (Harvard, 8-bit RISC) |
| Program Memory Type | ROMless (external memory interface) |
| External Memory Address Space | 2 MB |
| Instruction Set Size | 77 single-word instructions |
| Instruction Execution Time | 160 ns (at 25 MHz, 6.25 MIPS) |
| Maximum CPU Clock | 25 MHz |
| On-chip RAM | 1.5 KB (1536 bytes) |
| Digital I/O Pins | 37 |
| ADC | 12 channels, 10-bit resolution |
| Capture/Compare/PWM Modules | 2 |
| Serial Interfaces | 1x SSP (SPI or I2C configurable) |
| Điện áp cung cấp | 5 V |
| Oscillator Type | External |
| Nhiệt độ hoạt động | -40C to +85C (industrial grade) |
| Hộp | TQFP-80 (PT) |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Depends on date code - check lot markings |
| Pin/Package Compatibility | Upward compatible with PIC16C5X, PIC12CXXX families (architectural, not pin-to-pin) |
Cấu hình chân PIC18C801-I/PT
| Chân 1 | MCLR — Master clear (reset) input |
| Chân 2 | OSC1 — External oscillator input |
| Chân 3 | OSC2 — External oscillator output |
| Chân 4 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| Chân 5 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| Chân 6 | RA2/AN2 — PORTA bit 2 / ADC channel 2 |
| Chân 7 | RA3/AN3/VREF+ — PORTA bit 3 / ADC channel 3 / ADC VREF+ |
| Chân 8 | RA4/AN4 — PORTA bit 4 / ADC channel 4 |
| Chân 9 | RA5/AN5 — PORTA bit 5 / ADC channel 5 |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Positive supply (5V) |
| Chân 12 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 13 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 14 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Chân 15 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O |
| Chân 16 | RB4 — PORTB bit 4 |
| Chân 17 | RB5 — PORTB bit 5 |
| Chân 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply (5V) |
| Chân 22 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Chân 23 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 24 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Chân 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 28 | RC6/TX — PORTC bit 6 / USART transmit |
| Chân 29 | RC7/RX — PORTC bit 7 / USART receive |
| Chân 30 | RD0/AD0 — PORTD bit 0 / external memory address/data bit 0 |
| Chân 31 | RD1/AD1 — PORTD bit 1 / external memory address/data bit 1 |
| Chân 32 | RD2/AD2 — PORTD bit 2 / external memory address/data bit 2 |
| Chân 33 | RD3/AD3 — PORTD bit 3 / external memory address/data bit 3 |
| Chân 34 | RD4/AD4 — PORTD bit 4 / external memory address/data bit 4 |
| Chân 35 | RD5/AD5 — PORTD bit 5 / external memory address/data bit 5 |
| Chân 36 | RD6/AD6 — PORTD bit 6 / external memory address/data bit 6 |
| Chân 37 | RD7/AD7 — PORTD bit 7 / external memory address/data bit 7 |
| Chân 38 | VSS — Ground |
| Chân 39 | VDD — Positive supply (5V) |
| Chân 40 | RE0/AD8 — PORTE bit 0 / external memory address bit 8 |
| Chân 41 | RE1/AD9 — PORTE bit 1 / external memory address bit 9 |
| Chân 42 | RE2/AD10 — PORTE bit 2 / external memory address bit 10 |
| Chân 43 | RE3/AD11 — PORTE bit 3 / external memory address bit 11 |
| Chân 44 | RE4/AD12 — PORTE bit 4 / external memory address bit 12 |
| Chân 45 | RE5/AD13 — PORTE bit 5 / external memory address bit 13 |
| Chân 46 | RE6/AD14 — PORTE bit 6 / external memory address bit 14 |
| Chân 47 | RE7/AD15 — PORTE bit 7 / external memory address bit 15 |
| Chân 48 | VSS — Ground |
| Chân 49 | VDD — Positive supply (5V) |
| Chân 50 | RF0/AD16 — PORTF bit 0 / external memory address bit 16 |
| Chân 51 | RF1/AD17 — PORTF bit 1 / external memory address bit 17 |
| Chân 52 | RF2/AD18 — PORTF bit 2 / external memory address bit 18 |
| Chân 53 | RF3/AD19 — PORTF bit 3 / external memory address bit 19 |
| Chân 54 | RF4/AD20 — PORTF bit 4 / external memory address bit 20 |
| Chân 55 | RF5/AN6 — PORTF bit 5 / ADC channel 6 |
| Chân 56 | RF6/AN7 — PORTF bit 6 / ADC channel 7 |
| Chân 57 | RF7/AN8 — PORTF bit 7 / ADC channel 8 |
| Chân 58 | VSS — Ground |
| Chân 59 | VDD — Positive supply (5V) |
| Chân 60 | RG0 — PORTG bit 0 |
| Chân 61 | RG1 — PORTG bit 1 |
| Chân 62 | RG2 — PORTG bit 2 |
| Chân 63 | RG3 — PORTG bit 3 |
| Chân 64 | RG4 — PORTG bit 4 |
| Chân 65 | RG5 — PORTG bit 5 |
| Chân 66 | RG6 — PORTG bit 6 |
| Chân 67 | RG7 — PORTG bit 7 |
| Chân 68 | AVSS — Analog ground |
| Chân 69 | AVDD — Analog supply (5V) |
| Chân 70 | RH0/A16 — PORTH bit 0 / external memory address bit (high) |
| Chân 71 | RH1/A17 — PORTH bit 1 / external memory address bit (high) |
| Chân 72 | RH2/A18 — PORTH bit 2 / external memory address bit (high) |
| Chân 73 | RH3/A19 — PORTH bit 3 / external memory address bit (high) |
| Chân 74 | RH4 — PORTH bit 4 |
| Chân 75 | RH5 — PORTH bit 5 |
| Chân 76 | RH6 — PORTH bit 6 |
| Chân 77 | RH7 — PORTH bit 7 |
| Chân 78 | RJ0 — PORTJ bit 0 |
| Chân 79 | RJ1 — PORTJ bit 1 |
| Chân 80 | VSS — Ground |
Ứng dụng tiêu biểu
PIC18C801-I/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Motor Control Boards, Sensor Interface Front Ends, Educational and Development Platforms, Legacy Industrial System Sustaining Engineering, Display and Human-Machine Interface Modules.
Industrial Automation Controllers
The PIC18C801-I/PT suits industrial automation controllers that need deterministic 8-bit processing, a large external code space for complex ladder-logic-equivalent state machines, and robust 5V I/O. Its 37 digital I/O pins drive relays, optocouplers, and discrete sensors directly, while the 12-channel 10-bit ADC reads analog process variables (temperature, pressure, flow). The 2 MB external memory bus accommodates large protocol stacks (Modbus RTU, custom fieldbus) and lookup tables for PID tuning. Unlike flash-based PIC18F parts, the ROMless architecture lets field engineers update firmware via external Flash without in-circuit programming, simplifying field servicing. Two CCP modules provide PWM for proportional valve control, and the SPI/I2C port interfaces to digital sensors and expansion I/O. Pin-compatible with PIC18C601 for code under 128 KB.
Được đề xuất
Motor Control Boards
The PIC18C801-I/PT drives BLDC, stepper, and DC motor control boards via its two CCP modules generating 10-bit PWM at up to 25 MHz instruction rate. The 37 I/O pins support H-bridge gate drivers, Hall-sensor feedback, encoder inputs, and fault monitoring, while the 12-channel 10-bit ADC samples motor current, back-EMF, and temperature for closed-loop control. The 6.25 MIPS performance is sufficient for trapezoidal and sensorless commutation algorithms. The ROMless architecture enables field firmware updates via external Flash, valuable for tuning motor profiles without IC replacement. Industrial temperature grade (-40C to +85C) tolerates under-hood environments. Companion gate drivers and op-amps complete the analog signal chain.
Được đề xuất
Sensor Interface Front Ends
The PIC18C801-I/PT serves as a multi-channel sensor interface front end, with its 12-channel 10-bit ADC scanning analog sensors at rates up to ~50 ksps, and 37 I/O lines for digital sensor interfacing and bus arbitration. The 1.5 KB on-chip RAM holds scan buffers and calibration coefficients, while the 2 MB external memory bus stores sensor linearization tables and lookup data. SPI/I2C peripherals connect to digital temperature sensors, accelerometers, and expansion I/O expanders. Industrial-grade temperature operation allows deployment in harsh factory and outdoor environments. The ROMless design enables last-minute calibration data updates without scrapping programmed parts.
Được đề xuất
Educational and Development Platforms
The PIC18C801-I/PT is widely used in university and training labs as a teaching vehicle for the PIC18 Harvard architecture, because its ROMless design exposes the external memory bus - a topic increasingly omitted from flash-based MCU curricula. Students learn bus timing, wait-state insertion, and memory-mapped peripheral design directly. The 80-pin TQFP package accommodates breadboard-adapter PCBs, and the 5V supply is forgiving for lab power. The 25 MHz instruction rate keeps cycle-accurate exercises realistic. Pairing the device with an external EPROM or Flash socket lets students re-program without IC erasing. Source code libraries and reference designs are widely available from Microchip's application notes.
Được đề xuất
Legacy Industrial System Sustaining Engineering
The PIC18C801-I/PT remains the firmware baseline for installed industrial controllers, sustaining-engineering programs, and spare-parts manufacturing where the validated firmware binary must run on identical silicon. Its ROMless architecture lets sustain engineers patch code via external Flash swap without re-programming the MCU, preserving test traceability. The 80-pin TQFP remains compatible with original PCBs, and 5V I/O matches older analog front ends. The PIC18C601-I/PT is a true drop-in for firmware under 128 KB. Long-term production engineers transition designs to PIC18F8722-I/PT (flash-based, same TQFP-80 family) for new builds, while continuing PIC18C801 production for spare-parts orders.
Được đề xuất
Display and Human-Machine Interface Modules
The PIC18C801-I/PT drives small character LCDs, LED matrix panels, and key-scan interfaces for HMI modules in industrial and appliance settings. The 37 I/O pins handle 4-bit or 8-bit LCD data buses, LED row/column drivers, and matrix keypads without external logic. The 6.25 MIPS instruction rate supports multi-tasking menu rendering and debounce logic. The 1.5 KB RAM buffers display strings and key events, and the 2 MB external memory bus holds international character tables and multilingual message strings. The SPI/I2C peripheral expands to additional key/LED driver chips for larger panels.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18C801-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 | PIC18C601-I/PT | PIC18C658T-I/PT | PIC18C452T-I/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT/L) - same |
| Program Memory | ROMless (external bus, 2 MB addressable) | ROMless (external bus, 128 KB) | On-chip OTP (~32 KB) + external (64 KB) | On-chip OTP (32 KB), no external bus |
| External Memory Bus | Yes, 2 MB addressable | Yes, 128 KB | Yes, 64 KB | No |
| On-chip RAM | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB |
| Max CPU Clock | 25 MHz (6.25 MIPS) | 25 MHz | 40 MHz | 40 MHz |
| ADC Channels | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 8 x 10-bit |
| CCP Modules | 2 | 2 | 2 | 2 |
| CAN Module | No | No | Yes | No |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Largest external code space in PIC18 family (vsPIC18C601-I/PT)
- On-chip CAN module and OTP program memory (vsPIC18C452T-I/L)
- Higher instruction rate than PIC18C452 (vsPIC18C452T-I/L)
Ghi chú thiết kế
The TQFP-80 (PT) package requires a PCB land pattern with 0.50 mm pitch and an exposed thermal pad is not present - ground is supplied via multiple VSS pins (10, 20, 38, 48, 58, 80). Decouple each VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a bulk 10 uF tantalum or ceramic capacitor per VDD pair. The external memory bus signals (PORTD/AD0-AD7, PORTE/AD8-AD15, PORTF/AD16-AD20, PORTH) should be routed with matched lengths and series damping resistors near the MCU to suppress ringing on the parallel bus edges.
The external memory bus operates at the full oscillator rate; with a 25 MHz oscillator the address/data lines toggle in <40 ns. Route AD0-AD15 on an inner PCB layer with a continuous ground plane below, keep trace lengths under 50 mm, and place 33 ohm series resistors at the MCU outputs to damp reflections. The external bus is also shared with the digital I/O functions on PORTD/PORTE/PORTF/PORTH, so write to the LATx registers rather than PORTx to avoid read-modify-write hazards when toggling bus pins during external cycles.
Configuration word settings must be reviewed carefully for the PIC18C801; the watchdog timer, low-voltage programming, and oscillator modes are set in the config word and are not re-readable by firmware. Designers moving code from PIC18C601 to PIC18C801 must verify the bus configuration register enables the extended 2 MB address mode (PIC18C801 only) - on PIC18C601 the upper address bits are remapped. The ROMless design requires an external program memory device (EPROM/Flash) at the bus base; missing memory yields garbage execution.
Thông tin tuân thủ
Compliance status varies by date code; obsolete parts often ship from older lots. Verify RoHS/lead-free status with the specific supplier and Microchip's date-code marking. Part is industrial-grade (-40C to +85C) but not AEC-Q100 qualified for automotive use.
