PIC18F6621-E/PT - 8-Bit 25MHz 64KB Flash MCU 64-TQFP | Microchip
MPN: PIC18F6621-E/PT ✓ نشطPIC18F6621-E/PT نظرة عامة
A PIC18 microcontroller is an 8-bit Harvard-architecture MCU from Microchip's PIC (Peripheral Interface Controller) family. Within the broader taxonomy, PIC18 sits above PIC10/12/16 baseline devices and below 16-bit dsPIC and 32-bit PIC32 families, offering a balance of cost, performance, and code density. The PIC18F6621 belongs to the 64/80-pin high-performance sub-family that targets human-machine interface (HMI), automotive, and industrial control applications requiring large memory and many I/Os.
Key features include 64KB enhanced Flash with self-programmability, 3.8KB RAM, 1KB EEPROM, an internal 8 MHz RC oscillator (with PLL up to 40 MHz), 12-bit A/D converter (8 channels), two USART modules, MSSP (SPI/I2C), and capture/compare/PWM modules. The 64-pin TQFP package has a 10x10 mm body with 0.5 mm pitch, supporting surface-mount assembly on standard PCB processes. The device is engineered for demanding embedded systems that need robust 5V power supply tolerance and reliable operation across -40C to +125C.
Typical applications include industrial control panels, automotive body and instrument cluster modules, white goods and appliance controllers, medical device user interfaces, and HMI touch-screen boards. The extended memory and rich peripheral set also suit point-of-sale terminals and small graphical-display controllers.
When designing, ensure the 5V supply is well decoupled with 100 nF ceramic plus bulk capacitance placed close to VDD/AVDD/VSS pins. Program/debug is done via ICSP using the PGC/PGD pins - reserve these on the schematic for in-circuit programming access. The internal oscillator with PLL should be used only after verifying peripheral timing margin across the full temperature range.
بدائل مباشرة لـ PIC18F6621-E/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F6621-E/PT (نفس عامل الشكل والبصمة) — يختلف في Timers, Package, Core Architecture, Operating Temperature, MSL Level.
PIC18F6621-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6621T-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F6620T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6722-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6622-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6525T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6621-E/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18, 8-bit RISC, Harvard |
| أقصى تردد للساعة | 40 MHz (25 MHz per DigiKey listing) |
| Program Memory Type | Flash (enhanced, self-programmable) |
| Program Memory Size | 64 KB (32K x 16) |
| RAM Size | 3.8 KB |
| EEPROM Size | 1 KB |
| I/O Pins | 54 |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| نطاق درجة حرارة التشغيل | -40 C to +125 C (extended "E" grade) |
| A/D Converter | 12-bit, 8 channels |
| Communication Interfaces | 2x USART, MSSP (SPI/I2C) |
| Timers | Multiple 8/16-bit timers with CCP modules |
| Package Type | TQFP-64 (10x10 mm, 0.5 mm pitch) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| Lead-Free | Yes |
| ICSP Programming | Yes (PGC/PGD/PGM pins) |
تكوين أطراف PIC18F6621-E/PT
| دبوس 1 | MCLR/RE3 — Master Clear / digital I/O (input only on RE3) |
| دبوس 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| دبوس 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| دبوس 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| دبوس 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| دبوس 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| دبوس 8 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| دبوس 9 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| دبوس 10 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | OSC1/CLKI — Oscillator crystal input / external clock in |
| دبوس 14 | OSC2/CLKO — Oscillator crystal output / clock out |
| دبوس 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| دبوس 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| دبوس 17 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| دبوس 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| دبوس 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| دبوس 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| دبوس 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| دبوس 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| دبوس 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| دبوس 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| دبوس 25 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / USART1 clock |
| دبوس 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / USART1 data |
| دبوس 27 | PGC — ICSP programming clock |
| دبوس 28 | PGD — ICSP programming data |
| دبوس 29 | AVDD — Analog positive supply |
| دبوس 30 | AVSS — Analog ground |
| دبوس 31 | VSS — Ground reference |
| دبوس 32 | VDD — Positive supply voltage |
| دبوس 33 | RB3/CCP2 — PORTB bit 3 / CCP2 alternate |
| دبوس 34 | RB4 — PORTB bit 4 |
| دبوس 35 | RB5/PGM — PORTB bit 5 / low-voltage ICSP enable |
| دبوس 36 | RB6/PGC — PORTB bit 6 / alternate ICSP clock |
| دبوس 37 | RB7/PGD — PORTB bit 7 / alternate ICSP data |
| دبوس 38 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| دبوس 39 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| دبوس 40 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| دبوس 41 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| دبوس 42 | RE0/RD — PORTE bit 0 / parallel slave port read |
| دبوس 43 | RE1/WR — PORTE bit 1 / parallel slave port write |
| دبوس 44 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| دبوس 45 | RF0 — PORTF bit 0 |
| دبوس 46 | RF1/AN6/C2OUT — PORTF bit 1 / analog input 6 / comparator 2 output |
| دبوس 47 | RF2/AN7/C1OUT — PORTF bit 2 / analog input 7 / comparator 1 output |
| دبوس 48 | RF3/AN8 — PORTF bit 3 / analog input 8 |
| دبوس 49 | RF4/AN9 — PORTF bit 4 / analog input 9 |
| دبوس 50 | RF5/AN10/CVREF — PORTF bit 5 / analog input 10 / comparator VREF |
| دبوس 51 | RF6/AN11 — PORTF bit 6 / analog input 11 |
| دبوس 52 | RF7 — PORTF bit 7 |
| دبوس 53 | RG0 — PORTG bit 0 |
| دبوس 54 | RG1 — PORTG bit 1 |
| دبوس 55 | RG2 — PORTG bit 2 |
| دبوس 56 | RG3 — PORTG bit 3 |
| دبوس 57 | RG4 — PORTG bit 4 |
| دبوس 58 | RG5 — PORTG bit 5 |
| دبوس 59 | RA6 — PORTA bit 6 |
| دبوس 60 | RA7 — PORTA bit 7 |
| دبوس 61 | RC8 — PORTC bit 8 / enhanced CCP |
| دبوس 62 | RC9 — PORTC bit 9 / enhanced CCP |
| دبوس 63 | RC10 — PORTC bit 10 |
| دبوس 64 | RC11 — PORTC bit 11 |
التطبيقات النموذجية
PIC18F6621-E/PT مناسب لـ 6 التطبيقs: Industrial Control Panels, Automotive Body and Instrument Modules, White Goods and Appliance Controllers, Medical Device User Interfaces, Human-Machine Interface (HMI) Touch Panels, Point-of-Sale Terminals.
Industrial Control Panels
The PIC18F6621-E/PT suits industrial control panel applications because of its 54 I/O pins for keypads, LED indicators, and relay drivers, 64 KB Flash for ladder-logic and Modbus stacks, and extended -40C to +125C temperature grade for unconditioned factory-floor enclosures. Its 4.2-5.5V supply tolerance accepts noisy 24V-to-5V back-converter rails typical of PLC cabinets. The dual USART interfaces enable simultaneous RS-485 master and HMI display link. Compared to 3.3V-only PIC18F67J11, the 5V-native operation eliminates an LDO and reduces BOM cost.
موصى به
Automotive Body and Instrument Modules
The PIC18F6621-E/PT is appropriate for automotive body controllers and instrument cluster modules because of its -40C to +125C extended temperature grade covering under-hood and cabin extremes, plus 5V native supply compatible with 12V battery rails after regulation. The 12-bit ADC handles sensor inputs (temperature, fuel level, position), and the PWM modules drive motor and lighting loads. For instrument clusters, the 64 KB Flash stores graphics tables and CAN/LIN protocol stacks. The TQFP-64 package is automotive-vibration tolerant when properly PCB-anchored.
موصى به
White Goods and Appliance Controllers
The PIC18F6621-E/PT is well suited to white goods controllers (washing machines, dishwashers, refrigerators) because of its 5V tolerance, large I/O count for motor TRIAC drivers and user-interface key/LED matrices, and extended temperature range covering hot appliance interiors. The 64 KB Flash comfortably holds motor-control state machines and user-menu logic; the 3.8 KB RAM supports real-time display buffers. Compared to baseline PIC16F parts, the PIC18's 32 MIPS throughput simplifies sensor-fusion math for inverter compressor control.
موصى به
Medical Device User Interfaces
The PIC18F6621-E/PT supports medical device user-interface boards (infusion pump keypads, blood-pressure monitor displays, diagnostic readout panels) because of its deterministic 8-bit architecture, 64 KB Flash for IEC-62304 class B firmware, and extended temperature range for clinical environments. The 12-bit ADC reads sensor inputs with adequate resolution for trend monitoring. Note that full medical certification requires additional IEC-60601-1 system-level work beyond component choice. The 5V-tolerant I/O eases connection to legacy medical-rail peripherals.
موصى به
Human-Machine Interface (HMI) Touch Panels
The PIC18F6621-E/PT handles HMI touch-panel controller boards because of its 54 I/O count (driving segmented LCDs, key matrices, and UART-to-host), 64 KB Flash for menu logic, and dual USART for host-plus-debug channels. The 12-bit ADC reads resistive touch coordinates directly. Compared to PIC16F alternatives, the PIC18 instruction set accelerates GUI state-machine execution by ~3x. The TQFP-64 (10x10 mm) package fits behind mid-size (3-5 inch) display panels with adequate copper for thermal dissipation.
موصى به
Point-of-Sale Terminals
The PIC18F6621-E/PT is appropriate for point-of-sale (POS) terminal sub-controllers because of its dual USART (one for receipt printer, one for card reader), 64 KB Flash for transaction-log buffering, and reliable extended-temperature operation in retail environments. The I2C MSSP talks to EEPROM for transaction history. Compared to 3.3V-only PIC18F parts, the 5V operation interfaces directly with legacy 5V printer logic without level shifters. The TQFP-64 footprint is standard enough for easy PCB rework on field-deployed terminals.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F6621-E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F6621-I/PT | PIC18F6621T-I/PT | PIC18F6620T-I/PT | PIC18F6722-I/PT | PIC18F6622-I/PT | PIC18F6525T-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 64 KB | 64 KB - same | 64 KB - same | 32 KB (-50%) | 128 KB (+100%) | 128 KB (+100%) | 48 KB (-25%) |
| RAM | 3.8 KB | 3.8 KB - same | 3.8 KB - same | 2 KB (-47%) | 3.8 KB - same | 3.8 KB - same | 3.8 KB - same |
| EEPROM | 1 KB | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same |
| Max Clock Speed | 40 MHz | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
أبرز الفروقات
- Extended temperature grade -40C to +125C (مقابلPIC18F6621-I/PT)
- 5V-native operation (مقابلPIC18F67J11-I/PT)
- 54 I/O pins in TQFP-64 (مقابلPIC18F6620T-I/PT)
ملاحظات التصميم
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pin pair (pins 11/12 and 31/32). Add a 10 uF bulk tantalum or ceramic at the board supply entry. AVDD (pin 29) requires its own 100 nF decoupling close to the pin plus a ferrite bead or 10 ohm resistor to VDD to isolate analog from digital switching noise. Brown-out reset is enabled in configuration bits to ensure clean power-up; verify the BOR voltage threshold matches your supply tolerance.
Reserve the ICSP pins (PGC pin 27, PGD pin 28, MCLR pin 1, VDD, VSS) on a 5-pin 0.1-inch header or test pad for in-circuit programming access. The TQFP-64 (10x10 mm, 0.5 mm pitch) requires IPC-7351 nominal land patterns with 0.30 mm pad width and 0.20 mm pad-to-pad gap; ENIG surface finish is recommended over HASL for fine-pitch reliability. For automotive and high-vibration environments, use underfilled or corner-glued TQFP-64 packages per IPC-9701 standards.
Do not leave MCLR floating - it requires a 10 kohm pull-up to VDD. The PGM pin (RB5) must be pulled low or left NC for normal operation; only pull high to enable low-voltage ICSP. The internal 8 MHz RC oscillator with PLL gives 32 MHz (8 MIPS) but accuracy is only +/-2% - use an external crystal for CAN, USB, or Ethernet timing. Configuration bits must be set correctly to enable the watchdog timer, BOR, and oscillator mode or the MCU will fail to start.
Route the oscillator traces (OSC1/OSC2, pins 13/14) short and symmetric, guard-traced with ground, and keep them away from switching I/O and ADC inputs. The analog inputs AN0-AN11 share pins with digital I/O - if used as analog, the corresponding TRIS bit must be set to input. Place a 100 nF + 10 uF decoupling pair at AVSS/AVDD and route analog traces perpendicular to digital switching lines to minimize crosstalk.
معلومات الامتثال
RoHS compliant per DigiKey verified listing 2026-09-28. AEC-Q100 marked not_applicable - the -E grade temperature range (-40C to +125C) is automotive-compatible but Microchip does not certify PIC18F6621 as AEC-Q100 qualified at the component level. Check Microchip product page for any auto-qualified -Q1 variants.
