PIC18C242T-E/SO - 8-bit 40MHz PIC MCU 16KB OTP SOIC-28 | Microchip
MPN: PIC18C242T-E/SO ✗ Cuối đờiPIC18C242T-E/SO Tóm tắt
An 8-bit microcontroller is a small single-chip computer that integrates a CPU, program memory, RAM, peripherals (timers, A/D, communication ports), and I/O on a single die. Within the taxonomy, PIC18C242 belongs to Microcontroller -> Embedded Controller -> Integrated Circuit -> Semiconductor. The PIC18 family uses a RISC Harvard architecture with separate program and data buses, enabling single-cycle instruction execution except for branch instructions that take two cycles.
Key features include 16 KB OTP program memory (8K x 16), 512 bytes of data RAM, eight priority levels for interrupts, a single-cycle hardware multiplier, and 10 MIPS peak throughput when driven by a 40 MHz oscillator. The 28-pin SOIC variant omits the Parallel Slave Port and reduces A/D input channels to 5 compared to 40-pin package variants.
Technical depth: The PIC18C242 combines a 16-bit instruction word for compact code density with an 8-bit data path, allowing efficient C compiler code generation while keeping peripheral registers byte-addressable. The single-cycle hardware 8x8 multiplier accelerates DSP routines such as FIR filters or closed-loop control math, while prioritized interrupts reduce latency for time-critical events.
Typical applications include industrial control (sensor interfaces, motor control subsystems), automotive body electronics and instrumentation, consumer appliance control boards, and embedded data acquisition front-ends. The extended temperature range makes it suitable for harsh-environment nodes.
When designing with this part, remember that OTP memory cannot be re-programmed - use it on production-intent boards where code is final, or evaluate Flash-based PIC18F242 alternatives such as the PIC18F2420 for prototyping. Decoupling VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin is essential.
This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the standalone Microchip datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18C242T-E/SO — 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 PIC18C242T-E/SO (cùng hình factor và footprint) — khác nhau ở Core Architecture, Operating Temperature, Package, ADC, RoHS Status.
PIC18C242T-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18C242-E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2420-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2520-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F242-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F14K22-I/SO
✅ Drop-In✗ Hết hàng
$1.52 / Đơn vị
Xem tài liệu →DSPIC33EV128GM004-E/P8
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18C242T-E/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC RISC, Harvard |
| Core Size | 8-bit |
| Tần số xung maksimum | 40 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| Data RAM | 512 bytes |
| Instruction Word Width | 16-bit |
| Bề rộng đường dữ liệu | 8-bit |
| Điện áp cung cấp | 5 V |
| Khoảng nhiệt độ hoạt động | -40C to +125C (Extended) |
| Hộp / Vỏ | 28-SOIC (0.295", 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Peak Throughput | 10 MIPS |
| Hardware Multiplier | 8x8 single-cycle |
| Interrupt Priority Levels | 8 |
| A/D Channels (28-pin variant) | 5 |
| Parallel Slave Port | Not implemented on 28-pin variant |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18C242T-E/SO
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / A/D VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / A/D VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Chân 8 | OSC2/CLKO — Oscillator output / clock output |
| Chân 9 | OSC1/CLKI — Oscillator input / external clock input |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| Chân 11 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply (5 V) |
| Chân 20 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Chân 21 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Chân 22 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Chân 23 | RB3/CCP2 — PORTB bit 3 / Capture/Compare/PWM 2 |
| Chân 24 | RB4 — PORTB bit 4 |
| Chân 25 | RB5/PGM — PORTB bit 5 / LVP programming |
| Chân 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 28 | VSS — Ground (second VSS pin for 28-SOIC) |
Ứng dụng tiêu biểu
PIC18C242T-E/SO phù hợp cho 6 Áp dụngs: Industrial Control Systems, Automotive Body Electronics, Consumer Appliance Control, Embedded Data Acquisition, HMI / Display Driver Boards, Motor Control Subsystems.
Industrial Control Systems
The PIC18C242T-E/SO fits industrial control boards thanks to its extended -40C to +125C operating range, 40 MHz core (10 MIPS), and 8 priority interrupt levels for deterministic response to sensor and actuator events. The single-cycle 8x8 hardware multiplier accelerates PID control math and signal conditioning for closed-loop regulators. Its 28-SOIC footprint with 5 A/D channels handles a typical 4-20 mA loop front-end plus discrete digital I/O for valve or relay control, making it a strong fit for PLC expansion modules, motor-driver front-ends, and process-instrumentation nodes operating near machinery heat sources.
Được đề xuất
Automotive Body Electronics
The PIC18C242T-E/SO suits automotive body and chassis subsystems such as instrument clusters, lighting controllers, and HVAC flap drivers where extended temperature tolerance and 5 V operation are required. Its 16 KB OTP memory holds calibration tables and lookup maps for sensor linearization, while the 8-level prioritized interrupt controller manages CAN, LIN, or PWM events with bounded latency. The 28-SOIC package is footprint-compatible with AEC-Q100 Flash alternatives like PIC18F2420-I/SO, easing long-term migration for OEMs facing PIC18C-series obsolescence.
Được đề xuất
Consumer Appliance Control
The PIC18C242T-E/SO is well-suited for consumer appliance controllers - washing machines, dishwashers, microwave ovens, and refrigerator user-interface boards - where its 16 KB OTP holds application code and the 40 MHz core drives display multiplexing and keypad scanning. The 5 A/D channels read temperature sensors (NTC), water level probes, and motor current sense, while the hardware multiplier computes RMS and PID values for motor speed regulation. Its 28-SOIC package suits automated SMT assembly lines common in high-volume appliance production.
Được đề xuất
Embedded Data Acquisition
The PIC18C242T-E/SO serves as a low-cost data-acquisition front-end for sensor arrays in HVAC, energy metering, and building automation. Its 5-channel 10-bit (typical for the family) A/D converter multiplexes multiple analog sensors with deterministic latency under interrupt control, while 512 bytes of RAM buffer sample bursts before UART/I2C transmission to a host. The single-cycle hardware multiplier enables on-the-fly RMS and average computations, reducing host bandwidth in distributed sensing networks.
Được đề xuất
HMI / Display Driver Boards
The PIC18C242T-E/SO is ideal for low-cost human-machine interface modules driving character LCDs, LED matrices, and 7-segment displays. Its 40 MHz core refreshes 16-character x 2-line LCDs at smooth update rates while servicing button inputs and rotary encoders through prioritized interrupts. The 28-SOIC package's generous I/O count (PORTA, B, C, D, E subsets) supports parallel LCD data buses plus keypad matrix scanning without external logic, simplifying BOM for vending, kiosk, and instrument front panels.
Được đề xuất
Motor Control Subsystems
The PIC18C242T-E/SO can be the supervisory MCU in BLDC, stepper, or DC-brushed motor controllers where its 40 MHz core generates PWM waveforms, handles Hall-sensor feedback, and runs current/torque control loops. The hardware 8x8 multiplier accelerates field-oriented control (FOC) math, while 5 A/D channels monitor back-EMF, current sense, and temperature. Its 28-SOIC footprint mates with half-bridge drivers like MCPWM companions in fan, pump, and small e-mobility applications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18C242T-E/SO — 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 | PIC18C242T-I/SO | PIC18C242-E/SO | PIC18F2420-I/SO | PIC18F2520-I/SO | PIC18F242-I/SO | PIC18F14K22-I/SO | DSPIC33EV128GM004-E/P8 |
|---|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (0.295", 7.50 mm) | 28-SOIC (0.295") | 28-SOIC (0.295") | 28-SOIC (0.295") | 28-SOIC (0.295") | 28-SOIC (0.295") | 28-SOIC (0.295") | 28-SOIC (variant) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | 8-bit PIC18 RISC | 8-bit PIC18 RISC | 8-bit PIC18 RISC | 8-bit PIC18 RISC | 8-bit PIC18 RISC | 8-bit PIC18 RISC | 8-bit PIC14 enhanced RISC | 16-bit dsPIC33 DSP |
| Program Memory Type | OTP (16 KB / 8K x 16) | OTP (16 KB) | OTP (16 KB) | Flash (16 KB) | Flash (32 KB) | Flash (16 KB) | Flash (16 KB) | Flash (128 KB) |
| Data RAM | 512 bytes | 512 bytes | 512 bytes | 768 bytes | 1536 bytes | 768 bytes | 512 bytes | 8 KB |
| Max Clock Frequency | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 64 MHz | 70 MIPS |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| Supply Voltage | 5 V | 5 V | 5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 1.8 - 5.5 V | 3.0 - 3.6 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Active | Active | Active | Active |
| Approx Unit Price (qty 1) | $12.45 | ~$11.50 | ~$13.10 | ~$3.80 | ~$4.50 | ~$3.95 | ~$2.10 | ~$3.20 |
Bảo phân biệt quan trọng
- Extended -40C to +125C operating temperature range (vsPIC18C242T-I/SO)
- OTP memory technology for high-volume production (vsPIC18F2420-I/SO)
- Single-cycle 8x8 hardware multiplier and 8-level interrupt priority (vsDSPIC33EV128GM004-E/P8)
- 28-SOIC package compatibility with PIC18F-series Flash drop-ins (vsPIC18F2520-I/SO)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 19) and a bulk 10 uF tantalum or ceramic at the board supply entry. The PIC18C242T-E/SO requires a stable 5 V rail; ripple above 50 mV can trigger brown-out resets or A/D reference drift. For noisy environments, add a ferrite bead in series with VDD and a 10 uF capacitor on the MCU side.
OTP memory cannot be erased or rewritten. Engineers accustomed to Flash-based PIC18F parts may accidentally program production code into OTP silicon and scrap boards. Always validate firmware on a PIC18F2420-I/SO (pin-compatible Flash part) before committing the OTP version to production. Estimated: about 70% of OTP-vs-Flash confusion arises from oversight in prototype-to-production handoff.
Route the ICSP pins (RB6/PGC = pin 26, RB7/PGD = pin 27, MCLR/VPP = pin 1) to a 5-pin in-circuit programming header. Keep the trace between MCLR and the ICSP header short (under 50 mm) and avoid sharing it with high-current switching signals. The 28-SOIC package's 0.295 inch (7.50 mm) body width provides ample clearance for hand-soldered prototype boards.
The PIC18C242's 28-SOIC variant exposes only 5 A/D channels (vs 8 on the 40-pin PIC18C442). If your design needs more analog inputs, add an external analog multiplexer (e.g., CD4051) or migrate to the 40-pin PIC18C442-I/SP. Add a 100 nF bypass cap on each AVDD reference pin and route analog traces away from PWM outputs to avoid coupling.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. PIC18C242T-E/SO is not AEC-Q100 qualified; for AEC-Q100 applications, choose PIC18F2420-I/SO with automotive grade qualification.
