PIC18F452-E/L - 8-bit PIC MCU, 32KB Flash, 40MHz, 44-PLCC | Microchip
MPN: PIC18F452-E/L ✓ فعالPIC18F452-E/L نمای کلی
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals such as timers, ADCs, and communication interfaces into one IC. The PIC18F family sits at the upper end of Microchip's 8-bit portfolio, with an enhanced instruction set, hardware multiplier, and 16-bit-wide instruction words that double throughput versus the baseline PIC16 architecture. Within the broader taxonomy, the PIC18F452 belongs to the PIC18F45x sub-family, sharing pinout and code compatibility with PIC18F242/442/252/452 devices in 28- and 40/44-pin packages.
Key features of the PIC18F452-E/L include self-programmability for in-application firmware upgrades, an ICD (In-Circuit Debugger) interface for development, nanoWatt Technology power management with multiple idle and sleep modes, and code protection via configuration bits. The 40MHz clock provides 10 MIPS execution, while the 8-channel 10-bit ADC supports up to 8 analog inputs for sensor acquisition. The two CCP modules deliver flexible PWM, capture, and compare functions for motor control or timing applications.
Typical applications span industrial control systems, HVAC equipment, automotive body electronics, sensor signal conditioning, and embedded control panels. The wide 4.2V-5.5V supply tolerance and robust peripheral set make it well suited to 5V legacy designs that require deterministic real-time response without resorting to a 32-bit core.
Design consideration: choose the PIC18F452-I/L variant for room-temperature-only designs to reduce cost; choose PIC18F452-E/L when industrial temperature tolerance is required. Existing PIC18F452 PCB layouts can be reused if the MCU package footprint matches.
This page synthesizes distributor pricing, drop-in replacement alternatives, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای PIC18F452-E/L — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18F452-E/L (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Timers, Core Architecture, Operating Temperature, Mounting Type.
PIC18F452-I/L
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F452T-E/L
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F458-E/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F448-E/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F442-I/L
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18C452-I/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F452-E/L حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | 8-bit PIC18 RISC |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| I/O Pins | 34 |
| Analog-to-Digital Converter | 8 channels, 10-bit resolution |
| Capture/Compare/PWM Modules | 2 (CCP) |
| Timers | 1 x 8-bit, 3 x 16-bit |
| Serial Interfaces | MSSP (SPI / I2C), USART |
| بسته‌بندی | 44-PLCC (J-Lead), 16.59 x 16.59 mm |
| نوع نصب | Surface Mount (PLCC socket compatible) |
| Self-Programming | Yes (Flash program memory) |
| In-Circuit Debug (ICD) | Yes |
| Power-Saving Technology | nanoWatt Technology (idle/sleep modes) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC18F452-E/L
| پین 1 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC negative reference |
| پین 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC positive reference |
| پین 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| پین 4 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| پین 5 | RE0/RD/AN5 — Port E bit 0 / RD signal / Analog input 5 (parallel slave port) |
| پین 6 | RE1/WR/AN6 — Port E bit 1 / WR signal / Analog input 6 |
| پین 7 | RE2/CS/AN7 — Port E bit 2 / CS signal / Analog input 7 |
| پین 8 | VDD — Positive supply voltage |
| پین 9 | VSS — Ground reference |
| پین 10 | OSC1/CLKI/RA7 — Oscillator input / external clock in / Port A bit 7 |
| پین 11 | OSC2/CLKO/RA6 — Oscillator output / clock out / Port A bit 6 |
| پین 12 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| پین 13 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| پین 14 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| پین 15 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| پین 16 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| پین 17 | RC5/SDO — Port C bit 5 / SPI data out |
| پین 18 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| پین 19 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| پین 20 | VSS — Ground reference |
| پین 21 | VDD — Positive supply voltage |
| پین 22 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| پین 23 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| پین 24 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| پین 25 | RB3/CCP2 — Port B bit 3 / CCP2 output (alternate) |
| پین 26 | RB4 — Port B bit 4 |
| پین 27 | RB5 — Port B bit 5 |
| پین 28 | RB6/PGC — Port B bit 6 / ICSP clock |
| پین 29 | RB7/PGD — Port B bit 7 / ICSP data |
| پین 30 | VSS — Ground reference |
| پین 31 | VDD — Positive supply voltage |
| پین 32 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| پین 33 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| پین 34 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| پین 35 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| پین 36 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| پین 37 | RD5/PSP5 — Port D bit 5 / Parallel slave port bit 5 |
| پین 38 | RD6/PSP6 — Port D bit 6 / Parallel slave port bit 6 |
| پین 39 | RD7/PSP7 — Port D bit 7 / Parallel slave port bit 7 |
| پین 40 | VSS — Ground reference |
| پین 41 | VDD — Positive supply voltage |
| پین 42 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| پین 43 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| پین 44 | MCLR/VPP/RE3 — Master clear / programming voltage / Port E bit 3 |
کاربردهای معمول
PIC18F452-E/L مناسب است برای 6 کاربردs: Industrial Motor Control, HVAC Control Panels, Automotive Body Electronics, Sensor Signal Conditioning, Embedded Control Panels and HMIs, Legacy 5V Industrial Systems.
Industrial Motor Control
The PIC18F452-E/L is well suited to industrial motor control systems where deterministic PWM and robust 5 V tolerance are required. Its two CCP modules deliver complementary or independent PWM channels at up to 40 MHz core speed, enabling precise duty-cycle control for brushed DC, stepper, or small BLDC drives. The 8-channel 10-bit ADC samples current and voltage feedback at rates sufficient for closed-loop current limiting, while the extended -40 C to +125 C temperature grade handles cabinet-mounted drives in factory environments. Pair with an external gate driver such as the MCP14A0154 or IRS2003 for a complete motor stage.
پیشنهادی
HVAC Control Panels
HVAC controllers demand reliable analog sensing, multi-channel PWM for damper and valve actuation, and serial links for panel networking. The PIC18F452-E/L provides 8 ADC channels for temperature, humidity, and pressure sensors, two CCP modules for actuator control, and both MSSP (SPI/I2C) and USART for sensor expansion and Modbus/RS-485 communications. nanoWatt Technology idle and sleep modes keep standby power low in zone controllers. Extended temperature tolerance ensures reliable operation in plenum or attic-mounted enclosures.
پیشنهادی
Automotive Body Electronics
Although not AEC-Q100 qualified, the PIC18F452-E/L is widely used in body-electronics ECUs for window lifters, seat controllers, mirror adjustment, and interior lighting. The 32 KB Flash supports layered body-control firmware with diagnostics, while the 10-bit ADC reads switch positions and current sense. The 40 MHz core handles LIN slave or K-line protocol stacks. Pair the PIC18F452-E/L with a LIN transceiver like MCP2003B and a CAN module (PIC18F458-E/L) for gateway body modules.
پیشنهادی
Sensor Signal Conditioning
Multi-channel sensor front-ends require deterministic sampling and averaging to extract low-level analog signals. The PIC18F452-E/L's 10-bit ADC and flexible TMR0/TMR1 timers allow precise acquisition sequences with averaging in firmware, while the 16-bit-wide instructions execute DSP-like routines efficiently. The MSSP port connects to SPI ADC front-ends for higher-resolution systems. The 44-PLCC footprint is compact for sensor-hub PCBs and accepts IC sockets for lab rework.
پیشنهادی
Embedded Control Panels and HMIs
Control panels and HMIs integrate keypads, LCDs, status LEDs, and serial backhaul. The PIC18F452-E/L's 34 I/O lines drive character LCDs (4-bit or 8-bit mode), 4x4 matrix keypads via port-change interrupts, and several LED indicators. The USART connects to RS-232 or RS-485 backhaul, while the MSSP drives SPI peripherals such as EEPROM or RTC modules. Self-programming allows firmware updates via field service without disassembling the panel.
پیشنهادی
Legacy 5V Industrial Systems
Many 5 V industrial designs require drop-in 8-bit controllers with proven long-term firmware libraries. The PIC18F452-E/L preserves the 44-PLCC footprint and PIC18 instruction set, enabling board reuse when migrating from PIC16 or PIC17 systems. Its 4.2-5.5 V supply range tolerates loosely regulated 5 V rails commonly found in legacy plants. For designs needing more code space, the PIC18F4525-I/PT family offers a 48 KB Flash upgrade with code compatibility.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F452-E/L — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F452-I/L | PIC18F458-E/L | PIC18F448-E/L | PIC18F442-I/L | PIC18C452-I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | ROM (no Flash) |
| RAM | 1536 B | 1536 B | 1536 B | 768 B | 768 B | 1536 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | None (ROM part) |
| Maximum CPU Speed | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN 2.0B Controller | No | No | Yes | Yes | No | No |
| Temperature Grade | Extended (-40C to +125C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| ADC Channels | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit |
تفاوت‌های کلیدی
- Extended industrial temperature grade with 32 KB Flash in PLCC-44 (در مقابلPIC18F452-I/L)
- Adds CAN 2.0B controller with same Flash/RAM footprint (در مقابلPIC18F448-E/L)
- Self-programming Flash supports in-field firmware upgrades (در مقابلPIC18C452-I/L)
یادداشت‌های طراحی
Decouple the PIC18F452-E/L with a 100 nF ceramic capacitor as close as possible to each VDD/VSS pin pair (pins 8/9, 20/21, 30/31, 40/41) and add a single 10 uF bulk capacitor near the device. For battery-backed applications, the VDD/VSS pairs near Port B (pins 30/31) are critical because Port B interrupts can wake the MCU; clean power here reduces spurious wake events. nanoWatt Technology sleep modes draw less than 1 uA typically but only with stable VDD, so the bulk cap also supports deep-sleep entry.
Route the 40 MHz crystal traces (OSC1/OSC2, pins 10/11) as short as possible and guard them with a ground pour to minimize EMI. Place a 4-layer stack-up with a continuous ground plane beneath the MCU; for 2-layer boards, flood the area under the IC with ground copper tied back to the common ground. Keep the MCLR/VPP line (pin 44) short and decoupled with a 10-100 nF capacitor to VDD to avoid spurious resets in noisy environments.
The ICD/ICSP pins RB6/PGC (pin 28) and RB7/PGD (pin 29) are also general-purpose I/O. Avoid tying these to hard-pulled-up loads (LEDs to VDD) that prevent in-circuit programming; add a series resistor or jumper to isolate them during debug. Configuration bits must be set correctly for the oscillator mode (HS for high-speed crystal, XT for lower frequencies) or the MCU will fail to start. Always check the FAILSAFE Clock Monitor and WDT settings during bring-up.
The 10-bit ADC accuracy depends on clean VREF. Decouple the VREF+/- pins (RA2/RA3, pins 1/2) with 0.1 uF + 10 uF, and use a low-impedance reference source (MCP1501 or similar) instead of VDD for production designs. Acquire multiple samples and average in firmware when input source impedance exceeds 2.5 kohm to minimize ADC conversion errors. For 44-PLCC sockets, ensure the socket has low contact resistance and minimal parasitic capacitance on ADC pins.
اطلاعات انطباق
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; not recommended for safety-critical automotive under-hood applications. For automotive body electronics use cases, the part's extended temperature grade is often acceptable but formal AEC-Q100 qualification is absent.
