PIC18F46K40-E/P - 8-Bit 64MHz XLP MCU, 64KB Flash, 40-PDIP
MPN: PIC18F46K40-E/P ✓ Hoạt độngPIC18F46K40-E/P Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, program and data memory, and integrated peripherals. The PIC18F family uses Microchip's enhanced 8-bit RISC architecture with hardware multiply and a 16-bit instruction path, sitting between baseline PIC10/12/16 and the 16-bit PIC24/dsPIC families. Within Microchip's portfolio, the PIC18F46K40 belongs to the K40 sub-family, which adds the XLP (eXtreme Low Power) technology and 5V operation targeted at mains-powered and battery-aware general-purpose designs.
Key features of the PIC18F46K40-E/P include a 10-bit ADC with Computation (ADC2) oversampling, a 5-bit DAC, two comparators, multiple PWM/CCP/CWG peripherals, a Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and a CRC/SCAN memory scanner. Core Independent Peripherals such as CWG and CRC offload tasks from the CPU, while XLP technology delivers nanoWatt deep-sleep currents for battery-backed designs.
Architecturally, the device uses a Harvard bus with separate program Flash and data SRAM paths, an 8-level hardware stack, and a configurable instruction set with 49 base instructions plus hardware multiply. The 64MHz internal oscillator and the 31kHz low-power LFINTOSC give designers flexible clocking without external crystals, simplifying BOM and EMI footprint.
Typical applications include home appliance control, industrial sensor nodes, automotive body and lighting modules, USB-less human-interface panels, and low-power IoT edge controllers. Its 5V tolerance on digital I/O also makes it a fit for legacy 5V systems migrating away from older PIC16/PIC18 parts.
When designing with this device, allocate the 3720-byte SRAM carefully: the auto-addressed buffer and CAN/Ethernet stacks are common pitfalls. Use MPLAB X with XC8 and the Microchip Code Configurator (MCC) to auto-generate peripheral setup, and place a 100nF decoupling cap on each VDD/AVDD pin pair plus a 10uF bulk capacitor.
Bộ thay thế dễ dàng lắp đặt cho PIC18F46K40-E/P — 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 PIC18F46K40-E/P (cùng hình factor và footprint) — khác nhau ở Package, Program Memory (Flash), ADC, Operating Temperature, DAC.
PIC18F46K40-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46K42-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45Q43-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F46K40-E/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit RISC, enhanced) |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data SRAM | 3720 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Clock | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V |
| ADC | 10-bit ADC2 with Computation, up to 35 channels |
| DAC | 5-bit, 1 channel |
| Comparators | 2 |
| PWM / CCP / CWG | Multiple PWM, 3 CCP, 1 CWG |
| Hardware Limit Timer (HLT) | Yes |
| Windowed WDT | Yes (WWDT) |
| CRC / Memory SCAN | Yes |
| I/O Pins | 36 |
| Hộp | 40-pin PDIP (through-hole) |
| Kiểu lắp đặt | Through-Hole |
| Temperature Grade (E suffix) | -40C to +125C (Extended Industrial) |
| Trạng thái RoHS | Compliant |
| Lead-Free / MSL | Lead-free, MSL 1 |
Cấu hình chân PIC18F46K40-E/P
| Chân 1 | RE3/MCLR — Master Clear (Reset) input, also digital input only on RE3 |
| Chân 2 | RA0 — PORTA bit 0, analog/digital I/O |
| Chân 3 | RA1 — PORTA bit 1, analog/digital I/O |
| Chân 4 | RA2 — PORTA bit 2, analog/digital I/O |
| Chân 5 | RA3 — PORTA bit 3, analog/digital I/O |
| Chân 6 | RA4 — PORTA bit 4, analog/digital I/O |
| Chân 7 | RA5 — PORTA bit 5, analog/digital I/O |
| Chân 8 | RA6 — PORTA bit 6, analog/digital I/O |
| Chân 9 | RA7 — PORTA bit 7, analog/digital I/O |
| Chân 10 | RE0 — PORTE bit 0, analog/digital I/O |
| Chân 11 | RE1 — PORTE bit 1, analog/digital I/O |
| Chân 12 | RE2 — PORTE bit 2, analog/digital I/O |
| Chân 13 | AVDD — Analog supply voltage |
| Chân 14 | AVSS — Analog ground |
| Chân 15 | OSC1/CLKIN — External clock input or crystal connection |
| Chân 16 | OSC2/CLKOUT — External clock output or crystal connection |
| Chân 17 | RC0 — PORTC bit 0, analog/digital I/O |
| Chân 18 | RC1 — PORTC bit 1, analog/digital I/O |
| Chân 19 | RC2 — PORTC bit 2, analog/digital I/O |
| Chân 20 | RC3 — PORTC bit 3, analog/digital I/O |
| Chân 21 | RC4 — PORTC bit 4, analog/digital I/O |
| Chân 22 | RC5 — PORTC bit 5, analog/digital I/O |
| Chân 23 | RC6 — PORTC bit 6, analog/digital I/O |
| Chân 24 | RC7 — PORTC bit 7, analog/digital I/O |
| Chân 25 | RB0 — PORTB bit 0, analog/digital I/O |
| Chân 26 | RB1 — PORTB bit 1, analog/digital I/O |
| Chân 27 | RB2 — PORTB bit 2, analog/digital I/O |
| Chân 28 | RB3 — PORTB bit 3, analog/digital I/O |
| Chân 29 | RB4 — PORTB bit 4, analog/digital I/O |
| Chân 30 | RB5 — PORTB bit 5, analog/digital I/O |
| Chân 31 | RB6 — PORTB bit 6, analog/digital I/O, ICSCLK |
| Chân 32 | RB7 — PORTB bit 7, analog/digital I/O, ICSDAT |
| Chân 33 | VSS — Ground reference |
| Chân 34 | VDD — Positive supply voltage |
| Chân 35 | RD0 — PORTD bit 0, digital I/O |
| Chân 36 | RD1 — PORTD bit 1, digital I/O |
| Chân 37 | RD2 — PORTD bit 2, digital I/O |
| Chân 38 | RD3 — PORTD bit 3, digital I/O |
| Chân 39 | RD4 — PORTD bit 4, digital I/O |
| Chân 40 | RD5/RD6/RD7 — PORTD bits 5-7, digital I/O |
Ứng dụng tiêu biểu
PIC18F46K40-E/P phù hợp cho 6 Áp dụngs: Home Appliance Control, Industrial Sensor Nodes, Automotive Body & Lighting Modules, Human-Machine Interface Panels, Battery-Backed IoT Edge Nodes, Legacy 5V System Migration.
Home Appliance Control
The PIC18F46K40-E/P fits washing-machine, dishwasher, and microwave control boards because its 64MHz PIC18 core runs motor-control PWM loops while XLP deep-sleep keeps standby consumption under 1uA. The 5V-tolerant I/O directly drives triac and relay drivers without level shifters, and the 64KB Flash hosts a state-machine plus UART bootloader for service updates.
Được đề xuất
Industrial Sensor Nodes
With 64KB Flash and 3720 bytes SRAM, the PIC18F46K40-E/P runs Modbus RTU or IO-Link-like protocols on 4-20mA loops. The 10-bit ADC2 with Computation performs oversampling for thermocouple or strain-gauge conditioning, while the Hardware Limit Timer (HLT) trips a safety shutdown without CPU intervention. Industrial -40C to +125C rating supports factory-floor deployment.
Được đề xuất
Automotive Body & Lighting Modules
The PIC18F46K40-E/P drives LED arrays and body controllers via PWM, CWG, and CCP peripherals with deterministic 64MHz timing. The Extended -40C to +125C temperature grade handles under-dash environments, while the CRC/SCAN block validates firmware at boot for ASIL-conscious subsystems. Multiple PWM channels enable sequential LED indicators and RGB ambience lighting.
Được đề xuất
Human-Machine Interface Panels
The PIC18F46K40-E/P drives 7-segment, character LCD, and small TFT panels through PWM-driven LED backlights and software-driven segment scanning. The 36 I/O pins directly interface keypad matrices up to 4x4, while the 5-bit DAC generates audio feedback tones. The 64KB Flash accommodates bitmapped font tables and multilingual menu trees.
Được đề xuất
Battery-Backed IoT Edge Nodes
XLP nanoWatt technology makes the PIC18F46K40-E/P suitable for battery-powered edge sensors that wake on interrupt, sample an analog channel with ADC2, transmit over UART, and return to deep-sleep. The Windowed Watchdog (WWDT) detects firmware lockups without external components, while EEPROM stores calibration and threshold values across power cycles.
Được đề xuất
Legacy 5V System Migration
The PIC18F46K40-E/P's 5V-tolerant digital I/O and 2.3V to 5.5V supply allow direct replacement of legacy PIC16F877A, PIC18F4520, and PIC18F4620 boards without reworking the 5V rail. The CWG and PWM block upgrade motor and power-supply control loops, while the 64KB Flash accommodates a modern firmware image with bootloader. This preserves existing 5V analog signal chains.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F46K40-E/P — 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 | PIC18F46K40-I/P | PIC18F46K42-I/P | PIC18F45Q43-I/P | PIC18F46K40-I/PT |
|---|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 44-pin TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB | 64 KB | 64 KB | 32 KB (note: lower than this part) | 64 KB |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| XLP nanoWatt Sleep | Yes | Yes | Yes | Yes (lower) | Yes |
Bảo phân biệt quan trọng
- Extended -40C to +125C temperature grade (vsPIC18F46K40-I/P)
- 64KB Flash vs 32KB on Q43 family (vsPIC18F45Q43-I/P)
- Through-hole PDIP for prototype and field service (vsPIC18F46K40-I/PT)
Ghi chú thiết kế
Place a 100nF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin pair (pins 13/14 and 33/34 on the 40-pin PDIP). Add a single 10uF bulk capacitor near the device to handle HFINTOSC bursts during 64MHz operation. Do not assume the internal LDO is sufficient - external decoupling is mandatory per the K40 datasheet layout guidelines.
Estimated: the 3720-byte SRAM is shared between the stack, the auto-allocated buffer, and user variables. A typical Modbus RTU stack consumes 800-1000 bytes, leaving 2700+ bytes for application - but careless malloc or large printf buffers can quickly exhaust this. Use the MPLAB X linker's stack-usage analysis to verify call depth fits the 8-level hardware stack.
Route the ICSPDAT (RB7) and ICSCLK (RB6) lines to the ICSP header with no series resistors and short traces to avoid ICD 4 programmer communication failures. Place the MCLR pull-up (typically 10kohm) close to pin 1 with a 100nF cap to ground for debounce. Keep analog traces (RA0-RA5) away from PWM signals to minimize ADC2 crosstalk.
Thông tin tuân thủ
RoHS and lead-free confirmed by Microchip product page. AEC-Q100 not qualified - this is a general-purpose MCU, not an automotive-qualified part. Halogen-free status not explicitly stated in the provided data.
