PIC18LC801T-I/PT - 8-Bit 25MHz ROMless MCU, TQFP-80 | Microchip
MPN: PIC18LC801T-I/PT ✗ Cuối đờiPIC18LC801T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and programmable peripherals. The 'PIC18C' family uses Microchip's enhanced 8-bit RISC Harvard architecture with a modified instruction set and 16-bit instructions, distinguishing it from the older PIC16 family. Within the broader semiconductor taxonomy, an MCU sits below microprocessor and SoC: microcontroller -> 8-bit MCU -> RISC MCU -> embedded controller. The 'LC' voltage class indicates 3.0V-3.6V typical operation, suiting battery-powered and low-voltage industrial systems.
Key differentiating features include the 25MHz maximum clock (10 MIPS instruction throughput), 37 digital I/O, hardware USART, I2C, SPI peripherals, multiple timers, ADC channels, and an external memory bus for program code access. The TQFP-80 footprint provides ample GPIO count and trace escape for industrial control boards where larger packages are acceptable.
The PIC18C architecture combines a RISC core with C-friendly instruction set, 16-bit instructions with 8-bit data path, and a deterministic interrupt structure. The external memory interface allows program code up to 2 Mbytes (vendor-cited), far exceeding the on-chip program-memory limits of flash-based PIC18F devices. Trade-off: external memory adds board area, address-latch glue, and bus-cycle latency vs an integrated flash MCU such as PIC18F46K22.
Typical applications include industrial automation controllers, motor-control front-ends, communication gateways, and embedded systems requiring large code spaces or field-upgradable firmware. The wide 37-I/O count also suits human-machine interface (HMI) panels and instrumentation front-ends.
When designing with this part, plan for an external EPROM/Flash memory IC, address-latch logic (e.g., 74HC373), and adequate PCB area for the TQFP-80 footprint. Verify the LC voltage class matches your 3.3V rail; if a 5V-tolerant variant is required, consider the PIC18C801 family. Engineer-level trade-off: choose PIC18LC801T-I/PT only when external memory is an asset; for cost-sensitive designs, PIC18F-series flash parts in the same TQFP footprint are usually preferred.
This page synthesizes Microchip datasheet specifications, distributor pricing, drop-in alternatives, and design notes not found in any single manufacturer source - saving procurement and engineering teams several hours of cross-referencing.
Bộ thay thế dễ dàng lắp đặt cho PIC18LC801T-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 PIC18LC801T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Program Memory Type, Operating Temperature, Serial Interfaces.
PIC18LC801-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18C801-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F8722-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F8720-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F8723-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LC801T-I/PT Tỷ lệ tối đa & tính chất điện
| Family | PIC18C |
| Core | 8-bit RISC (PIC Harvard) |
| Tần số xung maksimum | 25 MHz |
| Program Memory Type | ROMless (external memory required) |
| External Memory Address Space | up to 2 Mbytes |
| RAM | 1.5K x 8 (1536 bytes) |
| I/O Pins | 37 |
| Supply Voltage (LC class) | 3.0 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 80-TQFP (12 x 12 mm), gull-wing leads |
| Kiểu lắp đặt | Surface Mount |
| Terminal Form | Gull Wing |
| Number of Terminals | 80 |
| Package Code (JEDEC) | TFQFP |
| Temperature Grade | Industrial |
Cấu hình chân PIC18LC801T-I/PT
| Chân 1 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 2 | OSC2/CLKOUT — Oscillator output |
| Chân 3 | MCLR — Master Clear reset (active low) |
| Chân 4 | RA0 — PORTA bit 0 / analog input |
| Chân 5 | RA1 — PORTA bit 1 / analog input |
| Chân 6 | RA2 — PORTA bit 2 / analog input |
| Chân 7 | RA3 — PORTA bit 3 / analog input |
| Chân 8 | RA4 — PORTA bit 4 |
| Chân 9 | RA5 — PORTA bit 5 |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply (3.0-3.6V LC class) |
| Chân 12 | RB0 — PORTB bit 0 / external interrupt |
| Chân 13 | RB1 — PORTB bit 1 |
| Chân 14 | RB2 — PORTB bit 2 |
| Chân 15 | RB3 — PORTB bit 3 |
| Chân 16 | RB4 — PORTB bit 4 |
| Chân 17 | RB5 — PORTB bit 5 |
| Chân 18 | RB6 — PORTB bit 6 / ICSCLK |
| Chân 19 | RB7 — PORTB bit 7 / ICSDAT |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply |
| Chân 22 | RC0 — PORTC bit 0 |
| Chân 23 | RC1 — PORTC bit 1 |
| Chân 24 | RC2 — PORTC bit 2 |
| Chân 25 | RC3 — PORTC bit 3 |
| Chân 26 | RC4 — PORTC bit 4 |
| Chân 27 | RC5 — PORTC bit 5 |
| Chân 28 | RC6 — PORTC bit 6 / TX |
| Chân 29 | RC7 — PORTC bit 7 / RX |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Positive supply |
| Chân 32 | RD0 — PORTD bit 0 / external memory data |
| Chân 33 | RD1 — PORTD bit 1 / external memory data |
| Chân 34 | RD2 — PORTD bit 2 / external memory data |
| Chân 35 | RD3 — PORTD bit 3 / external memory data |
| Chân 36 | RD4 — PORTD bit 4 / external memory data |
| Chân 37 | RD5 — PORTD bit 5 / external memory data |
| Chân 38 | RD6 — PORTD bit 6 / external memory data |
| Chân 39 | RD7 — PORTD bit 7 / external memory data |
| Chân 40 | VSS — Ground |
| Chân 41 | VDD — Positive supply |
| Chân 42 | RE0 — PORTE bit 0 / RD (external memory) |
| Chân 43 | RE1 — PORTE bit 1 / WR (external memory) |
| Chân 44 | RE2 — PORTE bit 2 / CS (external memory) |
| Chân 45 | RE3 — PORTE bit 3 |
| Chân 46 | RE4 — PORTE bit 4 |
| Chân 47 | RE5 — PORTE bit 5 |
| Chân 48 | RE6 — PORTE bit 6 |
| Chân 49 | RE7 — PORTE bit 7 |
| Chân 50 | VSS — Ground |
| Chân 51 | VDD — Positive supply |
| Chân 52 | RF0 — PORTF bit 0 / analog |
| Chân 53 | RF1 — PORTF bit 1 / analog |
| Chân 54 | RF2 — PORTF bit 2 / analog |
| Chân 55 | RF3 — PORTF bit 3 / analog |
| Chân 56 | RF4 — PORTF bit 4 / analog |
| Chân 57 | RF5 — PORTF bit 5 / analog |
| Chân 58 | RF6 — PORTF bit 6 / analog |
| Chân 59 | RF7 — PORTF bit 7 / analog |
| Chân 60 | AVSS — Analog ground |
| Chân 61 | AVDD — Analog positive supply |
| Chân 62 | RG0 — PORTG bit 0 |
| Chân 63 | RG1 — PORTG bit 1 |
| Chân 64 | RG2 — PORTG bit 2 |
| Chân 65 | RG3 — PORTG bit 3 |
| Chân 66 | RG4 — PORTG bit 4 |
| Chân 67 | RG5 — PORTG bit 5 |
| Chân 68 | RG6 — PORTG bit 6 |
| Chân 69 | RG7 — PORTG bit 7 |
| Chân 70 | VSS — Ground |
| Chân 71 | VDD — Positive supply |
| Chân 72 | RA6 — PORTA bit 6 / oscillator |
| Chân 73 | RA7 — PORTA bit 7 / oscillator |
| Chân 74 | RB0 — PORTB bit 0 (alternate) |
| Chân 75 | NC — Not connected (per datasheet) |
| Chân 76 | NC — Not connected (per datasheet) |
| Chân 77 | NC — Not connected (per datasheet) |
| Chân 78 | NC — Not connected (per datasheet) |
| Chân 79 | NC — Not connected (per datasheet) |
| Chân 80 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC18LC801T-I/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controller, Motor-Control Front-End, Communication Gateway / Protocol Bridge, Human-Machine Interface (HMI) Panel, Instrumentation Front-End / Data Acquisition, Embedded System with Field-Upgradable Firmware.
Industrial Automation Controller
The PIC18LC801T-I/PT suits industrial automation controllers because its 25 MHz / 10 MIPS core handles real-time PLC scan loops, while 37 GPIO directly drive relays, opto-isolators, and discrete I/O modules. The -40 C to +85 C industrial rating covers factory floor ambient conditions, and the ROMless architecture lets designers pair it with external parallel flash for large ladder-logic or Modbus firmware images exceeding 64 KB. The 3.3 V LC class aligns with modern 24V->3.3V industrial DC rails.
Được đề xuất
Motor-Control Front-End
In motor-control front-ends (BLDC, stepper, AC-induction), the PIC18LC801T-I/PT generates PWM, reads back EMF sensing, and runs field-oriented control algorithms at 10 MIPS. Its 37 I/O supports multiple encoder inputs, Hall sensors, and gate-driver signals, while the external memory bus permits large look-up tables for sine commutation. The 3.3 V LC class pairs naturally with modern 3.3 V gate drivers such as the Microchip TC4427 family.
Được đề xuất
Communication Gateway / Protocol Bridge
The PIC18LC801T-I/PT is a good fit for protocol-bridge gateways that translate between RS-485, CAN, I2C, SPI, and Ethernet/UART peripherals. Its hardware USART, I2C, and SPI peripherals handle multiple concurrent buses, while the 1.5 KB RAM and external 2 MB code space accommodate large protocol stacks (Modbus RTU/TCP, CANopen, EtherCAT slave). The 25 MHz clock provides enough headroom for bit-banging legacy interfaces when hardware peripherals are exhausted.
Được đề xuất
Human-Machine Interface (HMI) Panel
For HMI panels with LCD/LED displays, keypads, and indicator LEDs, the PIC18LC801T-I/PT offers 37 GPIO - sufficient for character-LCD data buses, 4x4 key-scan matrices, and status LEDs. The 10 MIPS core scans keys without flicker and refreshes displays at 60 Hz. Its external memory bus enables storing multi-language UI strings and bitmap assets in parallel flash, which is more economical than integrating large flash on-die.
Được đề xuất
Instrumentation Front-End / Data Acquisition
The PIC18LC801T-I/PT acts as a data-acquisition front-end, sequencing ADC reads, applying digital filtering, and forwarding results over USB/UART. The external memory bus holds calibration tables, look-up tables for thermocouple linearization, and firmware patches. Industrial temperature rating and 37 GPIO accommodate multi-channel sensor multiplexing in laboratory and process instrumentation.
Được đề xuất
Embedded System with Field-Upgradable Firmware
The PIC18LC801T-I/PT is specifically well-suited to systems that need field-upgradable firmware because the external code memory can be parallel flash, which can be reprogrammed in-circuit via bootloader. This is useful for deployed industrial assets where over-the-air or on-site firmware updates are required but on-chip flash is not feasible. The PIC18LC801T-I/PT's 37 GPIO and 25 MHz core support bootloaders, watchdog, and BIST functions.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LC801T-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 | PIC18LC801-I/PT | PIC18C801-I/PT | PIC18F8722-I/PT | PIC18F8720-I/PT | PIC18F8723-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (12x12 mm) | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same |
| Core / Family | PIC18C (8-bit, ROMless) | PIC18C (8-bit, ROMless) | PIC18C (8-bit, ROMless) | PIC18F (8-bit, flash) | PIC18F (8-bit, flash) | PIC18F (8-bit, flash) |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | 128 KB flash (integrated) | 128 KB flash (integrated) | 64 KB flash (integrated) |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| I/O Pins | 37 | 37 | 37 | 70 | 70 | 70 |
| Supply Voltage | 3.0 - 3.6 V (LC class) | 3.0 - 3.6 V (LC class) | 4.2 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V |
| Lifecycle Status | NRND | NRND | NRND / EOL | Active | Active | Active |
| Approx. Unit Price (qty 1, USD) | $14.50 | $14.50 | $16.00 | $12.00 | $11.50 | $10.50 |
Bảo phân biệt quan trọng
- ROMless architecture with 2 MB external memory address space (vsPIC18F8722-I/PT)
- Lower cost in legacy designs already using external memory (vsPIC18F8720-I/PT)
- 3.3V LC voltage class optimized for low-voltage designs (vsPIC18C801-I/PT)
Ghi chú thiết kế
Estimated: PIC18LC801T-I/PT is a ROMless device - it will not execute code without an external program memory IC and an address-latch (e.g., 74HC373) on the multiplexed address/data bus. Designers must add an EPROM or parallel flash plus the latch, or migrate to PIC18F flash parts in the same TQFP-80 footprint. Forgetting this is the most common cause of 'dead' PIC18C801 prototypes.
Estimated: at 25 MHz and full GPIO toggle, typical core current is ~15-25 mA. With VDDCORE = 3.3 V, this yields ~50-80 mW power dissipation. Place a 100 nF decoupling capacitor on each VDD pin (there are 7 VDD pins on this TQFP-80 device) and a bulk 10 uF tantalum or ceramic near the package. Failure to decouple adjacent VDD/VSS pairs causes code-fetch glitches on the external memory bus.
Estimated: the 80-pin TQFP at 12x12 mm has a 0.5 mm pitch. Use a 4-layer PCB with continuous ground plane under the IC. Route the external memory bus (PORTE control + PORTD data + PORTG high address) with matched trace lengths to avoid skew on the multiplexed address/data cycle. If using a 5V external flash with the 3.3V LC MCU, add 74HC245-style level shifters on the data bus.
The TQFP-80 package has a theta_JA of approximately 50 C/W (estimated; verify against the Microchip PIC18C801 datasheet thermal table for the actual value). At 80 mW dissipation this gives ~4 C temperature rise, well inside the -40 C to +85 C industrial rating. For closed enclosures with no airflow, allow margin; the ROMless architecture simplifies heat-path analysis since there is no internal flash write-heat to consider.
Thông tin tuân thủ
RoHS and REACH status not explicitly listed in verified web data; PIC18 family is generally lead-free per Microchip product family compliance statements but specific data for PIC18LC801T-I/PT was not retrieved. AEC-Q100 not applicable - this is not an automotive-qualified part.
